diff --git a/src/boot/init/io.cpp b/src/boot/init/io.cpp
index 82a2fcd096..624b70f871 100644
--- a/src/boot/init/io.cpp
+++ b/src/boot/init/io.cpp
@@ -1,6 +1,6 @@
 // Lean compiler output
 // Module: init.io
-// Imports: init.control.state init.control.except init.data.string.basic
+// Imports: init.control.state init.control.except init.data.string.basic init.fix
 #include "runtime/object.h"
 #include "runtime/apply.h"
 typedef lean::object obj;    typedef lean::usize  usize;
@@ -14,22 +14,26 @@ typedef lean::uint32 uint32; typedef lean::uint64 uint64;
 #pragma GCC diagnostic ignored "-Wunused-label"
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 #endif
-obj* l_io_prim_iterate___main___boxed(obj*, obj*);
-obj* l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4___boxed(obj*, obj*, obj*);
+obj* l_io_prim_iterate__aux___main___boxed(obj*, obj*);
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1(obj*, obj*, obj*, obj*);
 obj* l_io_fs_handle_mk___rarg(obj*, obj*, obj*, obj*, obj*, uint8, uint8);
 obj* l_io_fs_handle_is__eof___at_io_fs_handle_read__to__end___spec__1(obj*, obj*);
 obj* l_io_println___at_io_println_x_27___spec__1(obj*, obj*);
+obj* l_io_prim_iterate__aux___boxed(obj*, obj*);
 obj* l_from__eio(obj*, obj*);
 obj* l_io_print___boxed(obj*, obj*);
+obj* l_io_prim_iterate__aux___rarg(obj*, obj*, obj*, obj*);
 obj* l_id___boxed(obj*);
 obj* l_io_fs_handle_read__to__end___boxed(obj*, obj*);
 obj* l_io_prim_lift__eio___rarg___lambda__1(obj*, obj*, obj*, obj*);
 obj* l_string_has__to__string___boxed(obj*);
 extern "C" obj* lean_io_prim_handle_mk(obj*, uint8, uint8, obj*);
 obj* l_io_prim_handle_get__line___boxed(obj*, obj*);
+obj* l_io_prim_io__inhabited(obj*);
 obj* l_io_fs_handle_flush___rarg(obj*, obj*, obj*, obj*, obj*);
 obj* l_io_has__eval___boxed(obj*);
 extern obj* l_string_iterator_extract___main___closed__1;
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___boxed(obj*, obj*, obj*, obj*);
 obj* l_io_prim_handle_flush___boxed(obj*, obj*);
 obj* l_io_fs_handle_is__eof___rarg___lambda__1(obj*, obj*, obj*, obj*);
 obj* l_io_has__eval(obj*);
@@ -40,19 +44,18 @@ obj* l_io_fs_handle_get__line___at_io_fs_handle_read__to__end___spec__2___boxed(
 obj* l_io_has__eval___rarg(obj*, obj*, obj*);
 obj* l_eio__unit_has__eval___boxed(obj*);
 extern "C" obj* lean_io_prim_put_str(obj*, obj*);
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___rarg(obj*, obj*, obj*);
 obj* l_io_fs_handle_flush(obj*, obj*);
 obj* l_io_prim_lift__eio___rarg(obj*, obj*, obj*, obj*, obj*);
-obj* l_io_prim_iterate___main(obj*, obj*);
 obj* l_io_prim_get__line___boxed(obj*);
 obj* l_io_prim_handle_is__eof___boxed(obj*, obj*);
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg(obj*, obj*, obj*);
 obj* l_io_prim_handle_mk___boxed(obj*, obj*, obj*, obj*);
 obj* l_io_fs_read__file___rarg(obj*, obj*, obj*, obj*, obj*, uint8);
 obj* l_io_prim_lift__eio(obj*, obj*, obj*);
+obj* l_io_prim_io__inhabited___boxed(obj*);
 obj* l___private_init_io_12__put__str___at_io_println___spec__1(obj*, obj*);
 obj* l___private_init_io_12__put__str___at_io_println_x_27___spec__3(obj*, obj*);
 obj* l_io_fs_handle_mk___boxed(obj*, obj*);
-obj* l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3___boxed(obj*, obj*);
 obj* l_io_fs_handle_is__eof___at_io_fs_handle_read__to__end___spec__1___boxed(obj*, obj*);
 obj* l___private_init_io_12__put__str(obj*, obj*);
 obj* l_io_println_x_27___boxed(obj*, obj*);
@@ -70,34 +73,37 @@ obj* l_io_print___rarg(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l___private_init_io_12__put__str___rarg(obj*, obj*, obj*, obj*, obj*);
 obj* l_io_fs_read__file___boxed(obj*, obj*);
 obj* l_io_fs_handle_is__eof___boxed(obj*, obj*);
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1(obj*, obj*, obj*);
 obj* l_io_fs_read__file___rarg___lambda__2(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_io_fs_handle_read__to__end(obj*, obj*);
 obj* l_io_prim_put__str___boxed(obj*, obj*);
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___boxed(obj*, obj*, obj*);
 obj* l___private_init_io_12__put__str___boxed(obj*, obj*);
+obj* l_io_prim_iterate__eio___rarg___boxed(obj*, obj*, obj*, obj*);
 obj* l___private_init_io_12__put__str___at_io_println___spec__1___boxed(obj*, obj*);
 obj* l_io_prim_iterate__eio___boxed(obj*, obj*, obj*);
 obj* l_io_error_has__to__string;
+obj* l_io_prim_io__inhabited___rarg(obj*);
 obj* l_io_fs_read__file___rarg___lambda__3(obj*, obj*, obj*, obj*, obj*, obj*);
 extern "C" obj* lean_io_prim_handle_close(obj*, obj*);
 obj* l_io_lazy__pure___boxed(obj*);
+obj* l_io_prim_inhabited(obj*, obj*);
 obj* l_io_fs_handle_mk___at_io_fs_read__file___spec__1___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
-obj* l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4(obj*, obj*, obj*);
 obj* l_io_println___boxed(obj*, obj*);
 obj* l_io_fs_handle_mk___at_io_fs_read__file___spec__1(obj*, obj*);
-obj* l_io_prim_iterate(obj*, obj*);
-obj* l_io_prim_iterate___boxed(obj*, obj*);
-obj* l_io_prim_iterate__eio___rarg(obj*, obj*, obj*);
+obj* l_io_prim_iterate(obj*, obj*, obj*);
+obj* l_io_prim_iterate___boxed(obj*, obj*, obj*);
+obj* l_io_prim_iterate__eio___rarg(obj*, obj*, obj*, obj*);
 obj* l_has__repr_has__eval(obj*);
 obj* l_io_println___rarg___closed__1;
 obj* l_io_print(obj*, obj*);
 obj* l_io_fs_handle_is__eof(obj*, obj*);
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg___lambda__1(obj*, obj*, obj*);
+obj* l_io_prim_inhabited___rarg(obj*);
 obj* l_io_fs_handle_close___rarg(obj*, obj*, obj*, obj*, obj*);
 extern "C" obj* lean_io_prim_handle_flush(obj*, obj*);
 obj* l_io_fs_read__file___rarg___lambda__1(obj*, obj*, obj*);
 obj* l_io_monad;
 obj* l_io_println___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1___rarg(obj*, obj*);
 obj* l_id_monad___lambda__1___boxed(obj*, obj*, obj*, obj*);
 obj* l_state__t_monad___rarg(obj*);
 obj* l_eio__unit_has__eval(obj*);
@@ -105,13 +111,16 @@ obj* l_has__repr_has__eval___boxed(obj*);
 obj* l_eio_has__eval___rarg(obj*, obj*, obj*, obj*);
 extern "C" obj* lean_io_prim_get_line(obj*);
 obj* l_string_has__lift___boxed(obj*);
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1(obj*, obj*, obj*);
 obj* l_io_fs_handle_get__line___rarg(obj*, obj*, obj*, obj*, obj*);
 obj* l_eio__unit_has__eval___rarg(obj*, obj*, obj*);
+obj* l_io_prim_iterate__aux(obj*, obj*);
 extern "C" obj* lean_io_unsafe(obj*, obj*);
 obj* l_io_fs_read__file(obj*, obj*);
 obj* l___private_init_io_12__put__str___at_io_println___spec__1___rarg(obj*, obj*, obj*, obj*, obj*);
 obj* l_io_prim_lift__eio___boxed(obj*, obj*, obj*);
 obj* l_io_fs_handle_flush___boxed(obj*, obj*);
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1(obj*);
 extern "C" obj* lean_io_prim_handle_get_line(obj*, obj*);
 obj* l_unsafe__io___boxed(obj*, obj*);
 obj* l_io_lazy__pure(obj*);
@@ -119,9 +128,13 @@ obj* l_io_fs_handle_mk(obj*, obj*);
 obj* l_io_fs_read__file___rarg___lambda__1___boxed(obj*, obj*, obj*);
 obj* l_io_println_x_27(obj*, obj*);
 obj* l_io_lazy__pure___rarg(obj*, obj*);
+obj* l_io_error_inhabited;
 obj* l_io_fs_handle_read__to__end___rarg(obj*, obj*, obj*, obj*, obj*);
 obj* l_io_prim_handle_close___boxed(obj*, obj*);
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4(obj*, obj*);
 obj* l_id_bind___boxed(obj*, obj*);
+obj* l_io_prim_iterate__aux___main___rarg(obj*, obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1___boxed(obj*, obj*, obj*);
 obj* l_io_println(obj*, obj*);
 obj* l_io_print___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_timeit___boxed(obj*, obj*, obj*, obj*);
@@ -129,9 +142,11 @@ obj* l_io_print___at_io_println_x_27___spec__2(obj*, obj*);
 obj* l_io_fs_handle_mk___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 extern "C" obj* lean_io_timeit(obj*, obj*, obj*, obj*);
 obj* l_io_fs_handle_mk___at_io_fs_read__file___spec__1___rarg(obj*, obj*, obj*, obj*, obj*, uint8, uint8);
+obj* l_io_prim_inhabited___boxed(obj*, obj*);
 obj* l_io_fs_handle_close(obj*, obj*);
 obj* l_io_println___at_io_println_x_27___spec__1___boxed(obj*, obj*);
 obj* l_io__unit_has__eval(obj*, obj*);
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1___boxed(obj*);
 extern "C" obj* lean_io_prim_handle_is_eof(obj*, obj*);
 obj* l_eio_has__eval___boxed(obj*, obj*);
 obj* l_eio_has__eval___rarg___closed__1;
@@ -141,9 +156,9 @@ obj* l_io_fs_handle_get__line(obj*, obj*);
 obj* l_io_fs_handle_mk___at_io_fs_read__file___spec__1___boxed(obj*, obj*);
 obj* l_id_monad___lambda__3___boxed(obj*, obj*, obj*, obj*);
 obj* l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3(obj*, obj*);
+obj* l_io_prim_iterate__aux___main(obj*, obj*);
 obj* l_io_fs_read__file___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_io_prim_iterate__eio(obj*, obj*, obj*);
-obj* l_io_prim_iterate___main___rarg(obj*, obj*, obj*);
 obj* _init_l_io_monad() {
 _start:
 {
@@ -195,6 +210,14 @@ x_0 = lean::alloc_closure(reinterpret_cast<void*>(l_string_has__to__string___box
 return x_0;
 }
 }
+obj* _init_l_io_error_inhabited() {
+_start:
+{
+obj* x_0; 
+x_0 = lean::mk_string("");
+return x_0;
+}
+}
 obj* l_string_has__lift(obj* x_0) {
 _start:
 {
@@ -240,26 +263,24 @@ lean::dec(x_0);
 return x_1;
 }
 }
-obj* l_io_prim_iterate___main___rarg(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate__aux___main___rarg(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
 obj* x_4; obj* x_5; 
-lean::inc(x_1);
-x_4 = lean::apply_2(x_1, x_0, x_2);
+x_4 = lean::apply_2(x_0, x_2, x_3);
 x_5 = lean::cnstr_get(x_4, 0);
 lean::inc(x_5);
 if (lean::obj_tag(x_5) == 0)
 {
-obj* x_7; obj* x_10; 
+obj* x_7; obj* x_10; obj* x_13; 
 x_7 = lean::cnstr_get(x_4, 1);
 lean::inc(x_7);
 lean::dec(x_4);
 x_10 = lean::cnstr_get(x_5, 0);
 lean::inc(x_10);
 lean::dec(x_5);
-x_0 = x_10;
-x_2 = x_7;
-goto _start;
+x_13 = lean::apply_2(x_1, x_10, x_7);
+return x_13;
 }
 else
 {
@@ -288,187 +309,350 @@ return x_21;
 }
 }
 }
-obj* l_io_prim_iterate___main(obj* x_0, obj* x_1) {
+obj* l_io_prim_iterate__aux___main(obj* x_0, obj* x_1) {
 _start:
 {
 obj* x_2; 
-x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___main___rarg), 3, 0);
+x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___main___rarg), 4, 0);
 return x_2;
 }
 }
-obj* l_io_prim_iterate___main___boxed(obj* x_0, obj* x_1) {
+obj* l_io_prim_iterate__aux___main___boxed(obj* x_0, obj* x_1) {
 _start:
 {
 obj* x_2; 
-x_2 = l_io_prim_iterate___main(x_0, x_1);
+x_2 = l_io_prim_iterate__aux___main(x_0, x_1);
 lean::dec(x_0);
 lean::dec(x_1);
 return x_2;
 }
 }
+obj* l_io_prim_iterate__aux___rarg(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+_start:
+{
+obj* x_4; 
+x_4 = l_io_prim_iterate__aux___main___rarg(x_0, x_1, x_2, x_3);
+return x_4;
+}
+}
+obj* l_io_prim_iterate__aux(obj* x_0, obj* x_1) {
+_start:
+{
+obj* x_2; 
+x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___rarg), 4, 0);
+return x_2;
+}
+}
+obj* l_io_prim_iterate__aux___boxed(obj* x_0, obj* x_1) {
+_start:
+{
+obj* x_2; 
+x_2 = l_io_prim_iterate__aux(x_0, x_1);
+lean::dec(x_0);
+lean::dec(x_1);
+return x_2;
+}
+}
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1___rarg(obj* x_0, obj* x_1) {
+_start:
+{
+obj* x_2; 
+x_2 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_2, 0, x_0);
+lean::cnstr_set(x_2, 1, x_1);
+return x_2;
+}
+}
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = lean::alloc_closure(reinterpret_cast<void*>(l_state__t_pure___at_io_prim_io__inhabited___spec__1___rarg), 2, 0);
+return x_1;
+}
+}
+obj* l_io_prim_io__inhabited___rarg(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = lean::alloc_closure(reinterpret_cast<void*>(l_state__t_pure___at_io_prim_io__inhabited___spec__1___rarg), 2, 1);
+lean::closure_set(x_1, 0, x_0);
+return x_1;
+}
+}
+obj* l_io_prim_io__inhabited(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_io__inhabited___rarg), 1, 0);
+return x_1;
+}
+}
+obj* l_state__t_pure___at_io_prim_io__inhabited___spec__1___boxed(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = l_state__t_pure___at_io_prim_io__inhabited___spec__1(x_0);
+lean::dec(x_0);
+return x_1;
+}
+}
+obj* l_io_prim_io__inhabited___boxed(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = l_io_prim_io__inhabited(x_0);
+lean::dec(x_0);
+return x_1;
+}
+}
 obj* l_io_prim_iterate___rarg(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
+obj* x_3; obj* x_4; 
+x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___rarg), 4, 1);
+lean::closure_set(x_3, 0, x_1);
+x_4 = lean::fixpoint2(x_3, x_0, x_2);
+return x_4;
+}
+}
+obj* l_io_prim_iterate(obj* x_0, obj* x_1, obj* x_2) {
+_start:
+{
 obj* x_3; 
-x_3 = l_io_prim_iterate___main___rarg(x_0, x_1, x_2);
+x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___rarg), 3, 0);
 return x_3;
 }
 }
-obj* l_io_prim_iterate(obj* x_0, obj* x_1) {
+obj* l_io_prim_iterate___boxed(obj* x_0, obj* x_1, obj* x_2) {
+_start:
+{
+obj* x_3; 
+x_3 = l_io_prim_iterate(x_0, x_1, x_2);
+lean::dec(x_0);
+lean::dec(x_1);
+lean::dec(x_2);
+return x_3;
+}
+}
+obj* l_io_prim_inhabited___rarg(obj* x_0) {
+_start:
+{
+obj* x_1; 
+x_1 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_1, 0, x_0);
+return x_1;
+}
+}
+obj* l_io_prim_inhabited(obj* x_0, obj* x_1) {
 _start:
 {
 obj* x_2; 
-x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___rarg), 3, 0);
+x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_inhabited___rarg), 1, 0);
 return x_2;
 }
 }
-obj* l_io_prim_iterate___boxed(obj* x_0, obj* x_1) {
+obj* l_io_prim_inhabited___boxed(obj* x_0, obj* x_1) {
 _start:
 {
 obj* x_2; 
-x_2 = l_io_prim_iterate(x_0, x_1);
+x_2 = l_io_prim_inhabited(x_0, x_1);
 lean::dec(x_0);
 lean::dec(x_1);
 return x_2;
 }
 }
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___rarg(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg___lambda__1(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
-obj* x_4; obj* x_5; 
-lean::inc(x_0);
-x_4 = lean::apply_2(x_0, x_1, x_2);
-x_5 = lean::cnstr_get(x_4, 0);
-lean::inc(x_5);
-if (lean::obj_tag(x_5) == 0)
+obj* x_3; obj* x_4; 
+x_3 = lean::apply_2(x_0, x_1, x_2);
+x_4 = lean::cnstr_get(x_3, 0);
+lean::inc(x_4);
+if (lean::obj_tag(x_4) == 0)
 {
-obj* x_8; obj* x_10; obj* x_11; obj* x_13; obj* x_14; obj* x_15; 
-lean::dec(x_0);
-x_8 = lean::cnstr_get(x_4, 1);
+obj* x_6; obj* x_8; obj* x_9; obj* x_11; obj* x_12; obj* x_13; obj* x_14; 
+x_6 = lean::cnstr_get(x_3, 1);
+if (lean::is_exclusive(x_3)) {
+ lean::cnstr_release(x_3, 0);
+ x_8 = x_3;
+} else {
+ lean::inc(x_6);
+ lean::dec(x_3);
+ x_8 = lean::box(0);
+}
+x_9 = lean::cnstr_get(x_4, 0);
 if (lean::is_exclusive(x_4)) {
- lean::cnstr_release(x_4, 0);
- x_10 = x_4;
+ x_11 = x_4;
 } else {
- lean::inc(x_8);
+ lean::inc(x_9);
  lean::dec(x_4);
- x_10 = lean::box(0);
+ x_11 = lean::box(0);
 }
-x_11 = lean::cnstr_get(x_5, 0);
-if (lean::is_exclusive(x_5)) {
- x_13 = x_5;
+if (lean::is_scalar(x_11)) {
+ x_12 = lean::alloc_cnstr(0, 1, 0);
 } else {
- lean::inc(x_11);
- lean::dec(x_5);
- x_13 = lean::box(0);
+ x_12 = x_11;
 }
-if (lean::is_scalar(x_13)) {
- x_14 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_12, 0, x_9);
+x_13 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_13, 0, x_12);
+if (lean::is_scalar(x_8)) {
+ x_14 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_14 = x_13;
+ x_14 = x_8;
 }
-lean::cnstr_set(x_14, 0, x_11);
-if (lean::is_scalar(x_10)) {
- x_15 = lean::alloc_cnstr(0, 2, 0);
-} else {
- x_15 = x_10;
-}
-lean::cnstr_set(x_15, 0, x_14);
-lean::cnstr_set(x_15, 1, x_8);
-return x_15;
+lean::cnstr_set(x_14, 0, x_13);
+lean::cnstr_set(x_14, 1, x_6);
+return x_14;
 }
 else
 {
-obj* x_16; obj* x_18; 
-x_16 = lean::cnstr_get(x_5, 0);
-if (lean::is_exclusive(x_5)) {
- lean::cnstr_set(x_5, 0, lean::box(0));
- x_18 = x_5;
+obj* x_15; obj* x_17; 
+x_15 = lean::cnstr_get(x_4, 0);
+if (lean::is_exclusive(x_4)) {
+ lean::cnstr_set(x_4, 0, lean::box(0));
+ x_17 = x_4;
 } else {
- lean::inc(x_16);
- lean::dec(x_5);
- x_18 = lean::box(0);
+ lean::inc(x_15);
+ lean::dec(x_4);
+ x_17 = lean::box(0);
 }
-if (lean::obj_tag(x_16) == 0)
+if (lean::obj_tag(x_15) == 0)
 {
-obj* x_20; obj* x_23; 
-lean::dec(x_18);
-x_20 = lean::cnstr_get(x_4, 1);
-lean::inc(x_20);
-lean::dec(x_4);
-x_23 = lean::cnstr_get(x_16, 0);
-lean::inc(x_23);
-lean::dec(x_16);
-x_1 = x_23;
-x_2 = x_20;
-goto _start;
+obj* x_19; obj* x_21; obj* x_22; obj* x_24; obj* x_25; obj* x_26; 
+lean::dec(x_17);
+x_19 = lean::cnstr_get(x_3, 1);
+if (lean::is_exclusive(x_3)) {
+ lean::cnstr_release(x_3, 0);
+ x_21 = x_3;
+} else {
+ lean::inc(x_19);
+ lean::dec(x_3);
+ x_21 = lean::box(0);
+}
+x_22 = lean::cnstr_get(x_15, 0);
+if (lean::is_exclusive(x_15)) {
+ x_24 = x_15;
+} else {
+ lean::inc(x_22);
+ lean::dec(x_15);
+ x_24 = lean::box(0);
+}
+if (lean::is_scalar(x_24)) {
+ x_25 = lean::alloc_cnstr(0, 1, 0);
+} else {
+ x_25 = x_24;
+}
+lean::cnstr_set(x_25, 0, x_22);
+if (lean::is_scalar(x_21)) {
+ x_26 = lean::alloc_cnstr(0, 2, 0);
+} else {
+ x_26 = x_21;
+}
+lean::cnstr_set(x_26, 0, x_25);
+lean::cnstr_set(x_26, 1, x_19);
+return x_26;
 }
 else
 {
-obj* x_28; obj* x_30; obj* x_31; obj* x_34; obj* x_35; 
-lean::dec(x_0);
-x_28 = lean::cnstr_get(x_4, 1);
-if (lean::is_exclusive(x_4)) {
- lean::cnstr_release(x_4, 0);
- x_30 = x_4;
+obj* x_27; obj* x_29; obj* x_30; obj* x_32; obj* x_33; obj* x_34; obj* x_35; 
+x_27 = lean::cnstr_get(x_3, 1);
+if (lean::is_exclusive(x_3)) {
+ lean::cnstr_release(x_3, 0);
+ x_29 = x_3;
 } else {
- lean::inc(x_28);
- lean::dec(x_4);
- x_30 = lean::box(0);
+ lean::inc(x_27);
+ lean::dec(x_3);
+ x_29 = lean::box(0);
 }
-x_31 = lean::cnstr_get(x_16, 0);
-lean::inc(x_31);
-lean::dec(x_16);
-if (lean::is_scalar(x_18)) {
+x_30 = lean::cnstr_get(x_15, 0);
+if (lean::is_exclusive(x_15)) {
+ x_32 = x_15;
+} else {
+ lean::inc(x_30);
+ lean::dec(x_15);
+ x_32 = lean::box(0);
+}
+if (lean::is_scalar(x_17)) {
+ x_33 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_33 = x_17;
+}
+lean::cnstr_set(x_33, 0, x_30);
+if (lean::is_scalar(x_32)) {
  x_34 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_34 = x_18;
+ x_34 = x_32;
 }
-lean::cnstr_set(x_34, 0, x_31);
-if (lean::is_scalar(x_30)) {
+lean::cnstr_set(x_34, 0, x_33);
+if (lean::is_scalar(x_29)) {
  x_35 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_35 = x_30;
+ x_35 = x_29;
 }
 lean::cnstr_set(x_35, 0, x_34);
-lean::cnstr_set(x_35, 1, x_28);
+lean::cnstr_set(x_35, 1, x_27);
 return x_35;
 }
 }
 }
 }
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
-obj* x_3; 
-x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___rarg), 3, 0);
-return x_3;
+obj* x_3; obj* x_4; obj* x_5; 
+x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg___lambda__1), 3, 1);
+lean::closure_set(x_3, 0, x_1);
+x_4 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___rarg), 4, 1);
+lean::closure_set(x_4, 0, x_3);
+x_5 = lean::fixpoint2(x_4, x_0, x_2);
+return x_5;
 }
 }
-obj* l_io_prim_iterate__eio___rarg(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
-obj* x_3; 
-x_3 = l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___rarg(x_1, x_0, x_2);
-return x_3;
+obj* x_4; 
+x_4 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg), 3, 0);
+return x_4;
+}
+}
+obj* l_io_prim_iterate__eio___rarg(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+_start:
+{
+obj* x_4; 
+x_4 = l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___rarg(x_1, x_2, x_3);
+return x_4;
 }
 }
 obj* l_io_prim_iterate__eio(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
-x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__eio___rarg), 3, 0);
+x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__eio___rarg___boxed), 4, 0);
 return x_3;
 }
 }
-obj* l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1___boxed(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_prim_iterate__eio___spec__1___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
-obj* x_3; 
-x_3 = l_io_prim_iterate___main___at_io_prim_iterate__eio___spec__1(x_0, x_1, x_2);
+obj* x_4; 
+x_4 = l_io_prim_iterate___at_io_prim_iterate__eio___spec__1(x_0, x_1, x_2, x_3);
 lean::dec(x_0);
 lean::dec(x_1);
 lean::dec(x_2);
-return x_3;
+lean::dec(x_3);
+return x_4;
+}
+}
+obj* l_io_prim_iterate__eio___rarg___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+_start:
+{
+obj* x_4; 
+x_4 = l_io_prim_iterate__eio___rarg(x_0, x_1, x_2, x_3);
+lean::dec(x_0);
+return x_4;
 }
 }
 obj* l_io_prim_iterate__eio___boxed(obj* x_0, obj* x_1, obj* x_2) {
@@ -1160,7 +1344,7 @@ return x_20;
 }
 }
 }
-obj* l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; obj* x_4; obj* x_6; obj* x_7; 
@@ -1292,7 +1476,7 @@ lbl_5:
 {
 if (lean::obj_tag(x_3) == 0)
 {
-obj* x_51; obj* x_53; obj* x_54; obj* x_55; 
+obj* x_51; obj* x_53; obj* x_54; obj* x_55; obj* x_56; 
 x_51 = lean::cnstr_get(x_3, 0);
 if (lean::is_exclusive(x_3)) {
  x_53 = x_3;
@@ -1307,69 +1491,106 @@ if (lean::is_scalar(x_53)) {
  x_54 = x_53;
 }
 lean::cnstr_set(x_54, 0, x_51);
-x_55 = lean::alloc_cnstr(0, 2, 0);
+x_55 = lean::alloc_cnstr(1, 1, 0);
 lean::cnstr_set(x_55, 0, x_54);
-lean::cnstr_set(x_55, 1, x_4);
-return x_55;
+x_56 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_56, 0, x_55);
+lean::cnstr_set(x_56, 1, x_4);
+return x_56;
 }
 else
 {
-obj* x_56; obj* x_58; 
-x_56 = lean::cnstr_get(x_3, 0);
+obj* x_57; obj* x_59; 
+x_57 = lean::cnstr_get(x_3, 0);
 if (lean::is_exclusive(x_3)) {
  lean::cnstr_set(x_3, 0, lean::box(0));
- x_58 = x_3;
+ x_59 = x_3;
 } else {
- lean::inc(x_56);
+ lean::inc(x_57);
  lean::dec(x_3);
- x_58 = lean::box(0);
+ x_59 = lean::box(0);
 }
-if (lean::obj_tag(x_56) == 0)
+if (lean::obj_tag(x_57) == 0)
 {
-obj* x_60; 
-lean::dec(x_58);
-x_60 = lean::cnstr_get(x_56, 0);
-lean::inc(x_60);
-lean::dec(x_56);
-x_1 = x_60;
-x_2 = x_4;
-goto _start;
+obj* x_61; obj* x_63; obj* x_64; obj* x_65; 
+lean::dec(x_59);
+x_61 = lean::cnstr_get(x_57, 0);
+if (lean::is_exclusive(x_57)) {
+ x_63 = x_57;
+} else {
+ lean::inc(x_61);
+ lean::dec(x_57);
+ x_63 = lean::box(0);
+}
+if (lean::is_scalar(x_63)) {
+ x_64 = lean::alloc_cnstr(0, 1, 0);
+} else {
+ x_64 = x_63;
+}
+lean::cnstr_set(x_64, 0, x_61);
+x_65 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_65, 0, x_64);
+lean::cnstr_set(x_65, 1, x_4);
+return x_65;
 }
 else
 {
-obj* x_64; obj* x_67; obj* x_68; 
-x_64 = lean::cnstr_get(x_56, 0);
-lean::inc(x_64);
-lean::dec(x_56);
-if (lean::is_scalar(x_58)) {
- x_67 = lean::alloc_cnstr(1, 1, 0);
+obj* x_66; obj* x_68; obj* x_69; obj* x_70; obj* x_71; 
+x_66 = lean::cnstr_get(x_57, 0);
+if (lean::is_exclusive(x_57)) {
+ x_68 = x_57;
 } else {
- x_67 = x_58;
+ lean::inc(x_66);
+ lean::dec(x_57);
+ x_68 = lean::box(0);
 }
-lean::cnstr_set(x_67, 0, x_64);
-x_68 = lean::alloc_cnstr(0, 2, 0);
-lean::cnstr_set(x_68, 0, x_67);
-lean::cnstr_set(x_68, 1, x_4);
-return x_68;
+if (lean::is_scalar(x_59)) {
+ x_69 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_69 = x_59;
+}
+lean::cnstr_set(x_69, 0, x_66);
+if (lean::is_scalar(x_68)) {
+ x_70 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_70 = x_68;
+}
+lean::cnstr_set(x_70, 0, x_69);
+x_71 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_71, 0, x_70);
+lean::cnstr_set(x_71, 1, x_4);
+return x_71;
 }
 }
 }
 }
 }
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4(obj* x_0, obj* x_1) {
+_start:
+{
+obj* x_2; obj* x_3; obj* x_4; obj* x_5; 
+x_2 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1___boxed), 3, 1);
+lean::closure_set(x_2, 0, x_0);
+x_3 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___rarg), 4, 1);
+lean::closure_set(x_3, 0, x_2);
+x_4 = l_string_iterator_extract___main___closed__1;
+x_5 = lean::fixpoint2(x_3, x_4, x_1);
+return x_5;
+}
+}
 obj* l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3(obj* x_0, obj* x_1) {
 _start:
 {
-obj* x_2; obj* x_3; 
-x_2 = l_string_iterator_extract___main___closed__1;
-x_3 = l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4(x_0, x_2, x_1);
-return x_3;
+obj* x_2; 
+x_2 = l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4(x_0, x_1);
+return x_2;
 }
 }
 obj* l_io_fs_handle_read__to__end___rarg(obj* x_0, obj* x_1, obj* x_2, obj* x_3, obj* x_4) {
 _start:
 {
 obj* x_5; obj* x_6; obj* x_8; obj* x_9; obj* x_10; 
-x_5 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3___boxed), 2, 1);
+x_5 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3), 2, 1);
 lean::closure_set(x_5, 0, x_4);
 x_6 = lean::cnstr_get(x_3, 1);
 lean::inc(x_6);
@@ -1408,24 +1629,15 @@ lean::dec(x_0);
 return x_2;
 }
 }
-obj* l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4___boxed(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1___boxed(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
-x_3 = l_io_prim_iterate___main___at_io_fs_handle_read__to__end___spec__4(x_0, x_1, x_2);
+x_3 = l_io_prim_iterate___at_io_fs_handle_read__to__end___spec__4___lambda__1(x_0, x_1, x_2);
 lean::dec(x_0);
 return x_3;
 }
 }
-obj* l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3___boxed(obj* x_0, obj* x_1) {
-_start:
-{
-obj* x_2; 
-x_2 = l_io_prim_iterate__eio___at_io_fs_handle_read__to__end___spec__3(x_0, x_1);
-lean::dec(x_0);
-return x_2;
-}
-}
 obj* l_io_fs_handle_read__to__end___boxed(obj* x_0, obj* x_1) {
 _start:
 {
@@ -2023,6 +2235,7 @@ return x_1;
 void initialize_init_control_state();
 void initialize_init_control_except();
 void initialize_init_data_string_basic();
+void initialize_init_fix();
 static bool _G_initialized = false;
 void initialize_init_io() {
  if (_G_initialized) return;
@@ -2030,10 +2243,13 @@ void initialize_init_io() {
  initialize_init_control_state();
  initialize_init_control_except();
  initialize_init_data_string_basic();
+ initialize_init_fix();
  l_io_monad = _init_l_io_monad();
 lean::mark_persistent(l_io_monad);
  l_io_error_has__to__string = _init_l_io_error_has__to__string();
 lean::mark_persistent(l_io_error_has__to__string);
+ l_io_error_inhabited = _init_l_io_error_inhabited();
+lean::mark_persistent(l_io_error_inhabited);
  l_io_println___rarg___closed__1 = _init_l_io_println___rarg___closed__1();
 lean::mark_persistent(l_io_println___rarg___closed__1);
  l_eio_has__eval___rarg___closed__1 = _init_l_eio_has__eval___rarg___closed__1();
diff --git a/src/boot/init/lean/elaborator.cpp b/src/boot/init/lean/elaborator.cpp
index 448c4f46a9..472eb9d356 100644
--- a/src/boot/init/lean/elaborator.cpp
+++ b/src/boot/init/lean/elaborator.cpp
@@ -132,6 +132,7 @@ obj* l_rbnode_insert___at_lean_elaborator_ordered__rbmap_of__list___spec__3(obj*
 obj* l_list_filter___main___at_lean_elaborator_resolve__context___main___spec__3___boxed(obj*, obj*);
 obj* l_lean_elaborator_ordered__rbmap_empty___at_lean_elaborator_old__elab__command___spec__7(obj*);
 extern obj* l_lean_expander_error___rarg___lambda__1___closed__1;
+obj* l_lean_elaborator_process__command___lambda__1___closed__2;
 obj* l_lean_elaborator_notation_elaborate__aux___closed__1;
 obj* l_list_mmap___main___at_lean_elaborator_elab__def__like___spec__1___boxed(obj*, obj*, obj*, obj*);
 obj* l_lean_elaborator_mk__eqns___closed__2;
@@ -149,7 +150,6 @@ obj* l_lean_elaborator_to__pexpr___main___closed__31;
 obj* l_lean_elaborator_module_header_elaborate___boxed(obj*, obj*, obj*, obj*);
 obj* l_list_foldl___main___at_lean_elaborator_ordered__rbmap_of__list___spec__7___rarg(obj*, obj*, obj*);
 obj* l_lean_elaborator_register__notation__macro(obj*, obj*, obj*, obj*);
-obj* l_lean_elaborator_process__command___lambda__2___closed__2;
 obj* l_rbnode_insert___at_lean_elaborator_elaborators___spec__3(obj*, obj*, obj*, obj*);
 obj* l_lean_elaborator_preresolve___main___boxed(obj*, obj*, obj*, obj*);
 obj* l_list_foldl___main___at_lean_elaborator_include_elaborate___spec__1(obj*, obj*);
@@ -192,7 +192,6 @@ obj* l_list_mmap___main___at_lean_elaborator_declaration_elaborate___spec__2(obj
 obj* l_lean_elaborator_to__level___main___boxed(obj*, obj*, obj*, obj*);
 obj* l_rbnode_ins___main___at_lean_elaborator_elab__def__like___spec__7(obj*, obj*, obj*, obj*);
 obj* l_lean_elaborator_to__pexpr___main___closed__6;
-obj* l_lean_elaborator_process__command___lambda__1___boxed(obj*, obj*, obj*, obj*);
 obj* l_lean_elaborator_check_elaborate(obj*, obj*, obj*, obj*);
 obj* l_list_mmap___main___at_lean_elaborator_to__pexpr___main___spec__7___closed__2;
 obj* l_lean_elaborator_elaborator__m_monad;
@@ -357,7 +356,6 @@ obj* l_lean_elaborator_elaborator__m_monad__except;
 obj* l_lean_elaborator_command__parser__config_register__notation__tokens(obj*, obj*);
 obj* l_lean_elaborator_to__pexpr___main___closed__10;
 obj* l_lean_elaborator_ordered__rbmap_insert___at_lean_elaborator_variables_elaborate___spec__4(obj*, obj*, obj*);
-obj* l_lean_elaborator_process__command___lambda__2___closed__1;
 obj* l_lean_elaborator_end_elaborate___closed__2;
 uint8 l_list_foldr___main___at_lean_elaborator_is__open__namespace___main___spec__2(obj*, obj*);
 obj* l_lean_expander_error___at_lean_elaborator_current__scope___spec__1___rarg___boxed(obj*, obj*, obj*, obj*, obj*);
@@ -694,7 +692,6 @@ obj* l_dlist_singleton___rarg(obj*, obj*);
 extern obj* l_lean_expander_get__opt__type___main___closed__1;
 obj* l_list_mmap___main___at_lean_elaborator_preresolve___main___spec__1(obj*, obj*, obj*, obj*);
 extern obj* l_lean_parser_level_trailing_has__view;
-obj* l_lean_elaborator_process__command___lambda__2(obj*, obj*, obj*, obj*);
 obj* l_lean_parser_combinators_node___at_lean_parser_command_notation__spec_precedence__lit_parser___spec__1(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_list_append___rarg(obj*, obj*);
 obj* l_rbnode_insert___at_lean_elaborator_variables_elaborate___spec__6(obj*, obj*, obj*, obj*);
@@ -31512,31 +31509,11 @@ obj* _init_l_lean_elaborator_process__command___lambda__1___closed__1() {
 _start:
 {
 obj* x_0; 
-x_0 = lean::mk_string("elaborator.run: recursion depth exceeded");
-return x_0;
-}
-}
-obj* l_lean_elaborator_process__command___lambda__1(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
-_start:
-{
-obj* x_4; obj* x_5; obj* x_6; 
-x_4 = lean::alloc_cnstr(1, 1, 0);
-lean::cnstr_set(x_4, 0, x_0);
-x_5 = l_lean_elaborator_process__command___lambda__1___closed__1;
-x_6 = l_lean_expander_error___at_lean_elaborator_process__command___spec__1___rarg(x_4, x_5, x_2, x_3);
-lean::dec(x_4);
-return x_6;
-}
-}
-obj* _init_l_lean_elaborator_process__command___lambda__2___closed__1() {
-_start:
-{
-obj* x_0; 
 x_0 = lean::mk_string("not a command: ");
 return x_0;
 }
 }
-obj* _init_l_lean_elaborator_process__command___lambda__2___closed__2() {
+obj* _init_l_lean_elaborator_process__command___lambda__1___closed__2() {
 _start:
 {
 obj* x_0; 
@@ -31544,7 +31521,7 @@ x_0 = lean::mk_string("unknown command: ");
 return x_0;
 }
 }
-obj* l_lean_elaborator_process__command___lambda__2(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+obj* l_lean_elaborator_process__command___lambda__1(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
 obj* x_5; 
@@ -31559,7 +31536,7 @@ lean::cnstr_set(x_7, 0, x_1);
 x_8 = l_lean_parser_syntax_to__format___main(x_1);
 x_9 = lean::mk_nat_obj(80u);
 x_10 = l_lean_format_pretty(x_8, x_9);
-x_11 = l_lean_elaborator_process__command___lambda__2___closed__1;
+x_11 = l_lean_elaborator_process__command___lambda__1___closed__1;
 x_12 = lean::string_append(x_11, x_10);
 lean::dec(x_10);
 x_14 = l_lean_expander_error___at_lean_elaborator_process__command___spec__2___rarg(x_7, x_12, x_0, x_2, x_3);
@@ -31596,7 +31573,7 @@ if (lean::is_scalar(x_20)) {
 lean::cnstr_set(x_26, 0, x_1);
 x_27 = l_lean_name_to__string___closed__1;
 x_28 = l_lean_name_to__string__with__sep___main(x_27, x_21);
-x_29 = l_lean_elaborator_process__command___lambda__2___closed__2;
+x_29 = l_lean_elaborator_process__command___lambda__1___closed__2;
 x_30 = lean::string_append(x_29, x_28);
 lean::dec(x_28);
 x_32 = l_lean_expander_error___at_lean_elaborator_process__command___spec__2___rarg(x_26, x_30, x_0, x_2, x_3);
@@ -31659,14 +31636,14 @@ obj* _init_l_lean_elaborator_process__command___closed__1() {
 _start:
 {
 obj* x_0; 
-x_0 = lean::alloc_closure(reinterpret_cast<void*>(l_lean_elaborator_process__command___lambda__2), 4, 0);
+x_0 = lean::alloc_closure(reinterpret_cast<void*>(l_lean_elaborator_process__command___lambda__1), 4, 0);
 return x_0;
 }
 }
 obj* l_lean_elaborator_process__command(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
-obj* x_3; obj* x_5; obj* x_7; obj* x_9; obj* x_11; obj* x_13; obj* x_15; obj* x_17; obj* x_19; obj* x_21; obj* x_24; obj* x_35; obj* x_37; obj* x_38; obj* x_39; 
+obj* x_3; obj* x_5; obj* x_7; obj* x_9; obj* x_11; obj* x_13; obj* x_15; obj* x_17; obj* x_19; obj* x_21; obj* x_24; obj* x_35; obj* x_36; obj* x_37; 
 x_3 = lean::cnstr_get(x_1, 0);
 lean::inc(x_3);
 x_5 = lean::cnstr_get(x_1, 1);
@@ -31711,37 +31688,34 @@ lean::cnstr_set(x_35, 7, x_15);
 lean::cnstr_set(x_35, 8, x_17);
 lean::cnstr_set(x_35, 9, x_19);
 lean::cnstr_set(x_35, 10, x_21);
-lean::inc(x_2);
-x_37 = lean::alloc_closure(reinterpret_cast<void*>(l_lean_elaborator_process__command___lambda__1___boxed), 4, 1);
-lean::closure_set(x_37, 0, x_2);
-x_38 = l_lean_elaborator_process__command___closed__1;
-x_39 = lean::fixpoint3(x_38, x_2, x_0, x_35);
-if (lean::obj_tag(x_39) == 0)
+x_36 = l_lean_elaborator_process__command___closed__1;
+x_37 = lean::fixpoint3(x_36, x_2, x_0, x_35);
+if (lean::obj_tag(x_37) == 0)
 {
-obj* x_40; obj* x_43; obj* x_44; 
-x_40 = lean::cnstr_get(x_39, 0);
-lean::inc(x_40);
-lean::dec(x_39);
-x_43 = lean::alloc_cnstr(1, 2, 0);
-lean::cnstr_set(x_43, 0, x_40);
-lean::cnstr_set(x_43, 1, x_24);
-x_44 = lean::alloc_cnstr(0, 11, 0);
-lean::cnstr_set(x_44, 0, x_3);
-lean::cnstr_set(x_44, 1, x_5);
-lean::cnstr_set(x_44, 2, x_7);
-lean::cnstr_set(x_44, 3, x_9);
-lean::cnstr_set(x_44, 4, x_11);
-lean::cnstr_set(x_44, 5, x_43);
-lean::cnstr_set(x_44, 6, x_13);
-lean::cnstr_set(x_44, 7, x_15);
-lean::cnstr_set(x_44, 8, x_17);
-lean::cnstr_set(x_44, 9, x_19);
-lean::cnstr_set(x_44, 10, x_21);
-return x_44;
+obj* x_38; obj* x_41; obj* x_42; 
+x_38 = lean::cnstr_get(x_37, 0);
+lean::inc(x_38);
+lean::dec(x_37);
+x_41 = lean::alloc_cnstr(1, 2, 0);
+lean::cnstr_set(x_41, 0, x_38);
+lean::cnstr_set(x_41, 1, x_24);
+x_42 = lean::alloc_cnstr(0, 11, 0);
+lean::cnstr_set(x_42, 0, x_3);
+lean::cnstr_set(x_42, 1, x_5);
+lean::cnstr_set(x_42, 2, x_7);
+lean::cnstr_set(x_42, 3, x_9);
+lean::cnstr_set(x_42, 4, x_11);
+lean::cnstr_set(x_42, 5, x_41);
+lean::cnstr_set(x_42, 6, x_13);
+lean::cnstr_set(x_42, 7, x_15);
+lean::cnstr_set(x_42, 8, x_17);
+lean::cnstr_set(x_42, 9, x_19);
+lean::cnstr_set(x_42, 10, x_21);
+return x_42;
 }
 else
 {
-obj* x_55; obj* x_58; 
+obj* x_53; obj* x_56; 
 lean::dec(x_7);
 lean::dec(x_15);
 lean::dec(x_19);
@@ -31752,13 +31726,13 @@ lean::dec(x_5);
 lean::dec(x_9);
 lean::dec(x_3);
 lean::dec(x_21);
-x_55 = lean::cnstr_get(x_39, 0);
-lean::inc(x_55);
-lean::dec(x_39);
-x_58 = lean::cnstr_get(x_55, 1);
-lean::inc(x_58);
-lean::dec(x_55);
-return x_58;
+x_53 = lean::cnstr_get(x_37, 0);
+lean::inc(x_53);
+lean::dec(x_37);
+x_56 = lean::cnstr_get(x_53, 1);
+lean::inc(x_56);
+lean::dec(x_53);
+return x_56;
 }
 }
 }
@@ -31810,16 +31784,6 @@ lean::dec(x_1);
 return x_2;
 }
 }
-obj* l_lean_elaborator_process__command___lambda__1___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
-_start:
-{
-obj* x_4; 
-x_4 = l_lean_elaborator_process__command___lambda__1(x_0, x_1, x_2, x_3);
-lean::dec(x_1);
-lean::dec(x_3);
-return x_4;
-}
-}
 void initialize_init_lean_parser_module();
 void initialize_init_lean_expander();
 void initialize_init_lean_expr();
@@ -32100,10 +32064,8 @@ lean::mark_persistent(l_lean_elaborator_mk__state___closed__5);
 lean::mark_persistent(l_lean_elaborator_mk__state___closed__6);
  l_lean_elaborator_process__command___lambda__1___closed__1 = _init_l_lean_elaborator_process__command___lambda__1___closed__1();
 lean::mark_persistent(l_lean_elaborator_process__command___lambda__1___closed__1);
- l_lean_elaborator_process__command___lambda__2___closed__1 = _init_l_lean_elaborator_process__command___lambda__2___closed__1();
-lean::mark_persistent(l_lean_elaborator_process__command___lambda__2___closed__1);
- l_lean_elaborator_process__command___lambda__2___closed__2 = _init_l_lean_elaborator_process__command___lambda__2___closed__2();
-lean::mark_persistent(l_lean_elaborator_process__command___lambda__2___closed__2);
+ l_lean_elaborator_process__command___lambda__1___closed__2 = _init_l_lean_elaborator_process__command___lambda__1___closed__2();
+lean::mark_persistent(l_lean_elaborator_process__command___lambda__1___closed__2);
  l_lean_elaborator_process__command___closed__1 = _init_l_lean_elaborator_process__command___closed__1();
 lean::mark_persistent(l_lean_elaborator_process__command___closed__1);
 }
diff --git a/src/boot/init/lean/frontend.cpp b/src/boot/init/lean/frontend.cpp
index f4a281e07a..bdf564723d 100644
--- a/src/boot/init/lean/frontend.cpp
+++ b/src/boot/init/lean/frontend.cpp
@@ -15,13 +15,14 @@ typedef lean::uint32 uint32; typedef lean::uint64 uint64;
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 #endif
 obj* l___private_init_io_12__put__str___at_lean_process__file___spec__3___boxed(obj*, obj*);
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6(obj*, uint8, obj*, obj*, obj*, obj*, obj*);
+obj* l_io_prim_iterate__aux___rarg(obj*, obj*, obj*, obj*);
 obj* l_list_mmap_x_27___main___at_lean_run__frontend___spec__2(obj*, obj*, obj*);
 obj* l_lean_run__frontend___boxed(obj*, obj*, obj*, obj*, obj*);
 obj* l_lean_expander_expand(obj*, obj*);
 extern obj* l_lean_elaborator_notation_elaborate___closed__1;
 extern obj* l_string_iterator_extract___main___closed__1;
 obj* l_lean_parser_mk__token__trie(obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4(obj*, obj*, uint8, obj*, obj*, obj*, obj*);
 obj* l_lean_process__file___lambda__1___closed__6;
 obj* l___private_init_io_12__put__str___at_lean_process__file___spec__3(obj*, obj*);
 extern "C" obj* lean_io_prim_put_str(obj*, obj*);
@@ -33,19 +34,16 @@ extern obj* l_lean_expander_expand__bracketed__binder___main___closed__6;
 uint8 l_lean_parser_syntax_is__of__kind___main(obj*, obj*);
 obj* l_lean_parser_parse__command(obj*, obj*);
 obj* l_string_quote(obj*);
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2;
 extern obj* l_lean_expander_builtin__transformers;
 obj* l_lean_mk__config(obj*, obj*);
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3(obj*, obj*, obj*, obj*);
 obj* l_lean_process__file___lambda__1___closed__5;
 obj* l_lean_process__file___lambda__1___closed__8;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3;
 obj* lean_process_file(obj*, obj*, uint8, obj*);
 obj* l_lean_run__frontend(obj*, obj*, obj*, uint8, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 namespace lean {
 obj* string_append(obj*, obj*);
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_lean_process__file___lambda__1___closed__2;
 obj* l_list_mmap_x_27___main___at_lean_run__frontend___spec__1(obj*, obj*, obj*);
 obj* l_lean_kvmap_set__bool(obj*, obj*, uint8);
@@ -53,44 +51,49 @@ obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg(obj*, uint8
 obj* l_lean_process__file___closed__1;
 extern obj* l_lean_parser_term_builtin__trailing__parsers_lean_parser_has__tokens;
 extern obj* l_lean_parser_term_builtin__leading__parsers;
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3___boxed(obj*, obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1;
 obj* l_lean_process__file___lambda__1___closed__1;
 obj* l_lean_parser_tokens___rarg(obj*);
 extern obj* l_lean_parser_module_eoi;
 obj* l_io_println___at_lean_process__file___spec__1___boxed(obj*, obj*);
 extern obj* l_lean_format_be___main___closed__1;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2___boxed(obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1___boxed(obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2;
 obj* l_io_print___at_lean_process__file___spec__2___boxed(obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1(obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3(obj*, obj*, obj*, obj*);
 obj* l_io_println___at_lean_process__file___spec__1(obj*, obj*);
 extern obj* l_lean_options_mk;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1(obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1;
 obj* l_lean_process__file___lambda__1___boxed(obj*, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2___boxed(obj*, obj*, obj*);
 obj* l_lean_message_to__string(obj*);
 obj* l_lean_process__file___lambda__1___closed__7;
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3;
 obj* l_lean_file__map_from__string(obj*);
 extern obj* l_lean_parser_module_header_parser_lean_parser_has__tokens;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1___boxed(obj*, obj*, obj*);
 obj* l_lean_process__file___boxed(obj*, obj*, obj*, obj*);
 extern obj* l_lean_parser_term_builtin__leading__parsers_lean_parser_has__tokens;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1;
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_lean_parser_parse__header(obj*);
 obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5(obj*, obj*);
 extern obj* l_lean_parser_command_builtin__command__parsers;
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2(obj*, obj*, obj*);
 obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___boxed(obj*, obj*, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_list_mmap_x_27___main___at_lean_run__frontend___spec__1___closed__1;
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3___boxed(obj*, obj*, obj*, obj*);
 obj* l_lean_elaborator_mk__state(obj*, obj*);
 extern obj* l_lean_parser_command_builtin__command__parsers_lean_parser_has__tokens;
 extern obj* l_lean_parser_term_builtin__trailing__parsers;
 obj* l_nat_repr(obj*);
 obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___boxed(obj*, obj*);
-obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1;
 obj* l_lean_elaborator_process__command(obj*, obj*, obj*);
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2(obj*, obj*, obj*);
 obj* l_lean_process__file___lambda__1___closed__9;
 obj* l_io_print___at_lean_process__file___spec__2(obj*, obj*);
 obj* l_lean_file__map_to__position(obj*, obj*);
 obj* l_list_append___rarg(obj*, obj*);
 obj* l_lean_process__file___lambda__1(uint8, obj*, obj*);
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6(obj*, uint8, obj*, obj*, obj*, obj*, obj*, obj*);
 obj* l_lean_profileit__pure___rarg(obj*, obj*, obj*, obj*);
 obj* l_lean_process__file___lambda__1___closed__4;
 obj* l_list_mmap_x_27___main___at_lean_run__frontend___spec__3(obj*, obj*, obj*);
@@ -488,7 +491,7 @@ goto _start;
 }
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
@@ -496,7 +499,7 @@ x_3 = l_lean_parser_parse__command(x_0, x_1);
 return x_3;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
@@ -504,7 +507,7 @@ x_3 = l_lean_expander_expand(x_0, x_1);
 return x_3;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
 obj* x_4; 
@@ -512,7 +515,7 @@ x_4 = l_lean_elaborator_process__command(x_0, x_1, x_2);
 return x_4;
 }
 }
-obj* _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1() {
+obj* _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1() {
 _start:
 {
 obj* x_0; 
@@ -520,7 +523,7 @@ x_0 = lean::mk_string("parsing");
 return x_0;
 }
 }
-obj* _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2() {
+obj* _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2() {
 _start:
 {
 obj* x_0; 
@@ -528,7 +531,7 @@ x_0 = lean::mk_string("expanding");
 return x_0;
 }
 }
-obj* _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3() {
+obj* _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3() {
 _start:
 {
 obj* x_0; 
@@ -536,7 +539,7 @@ x_0 = lean::mk_string("elaborating");
 return x_0;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6(obj* x_0, uint8 x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4(obj* x_0, obj* x_1, uint8 x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6) {
 _start:
 {
 obj* x_7; obj* x_8; obj* x_10; obj* x_12; obj* x_14; obj* x_16; obj* x_19; obj* x_22; obj* x_25; obj* x_27; obj* x_30; obj* x_32; obj* x_35; obj* x_38; obj* x_41; obj* x_43; obj* x_46; obj* x_48; obj* x_49; obj* x_50; obj* x_51; obj* x_53; 
@@ -578,10 +581,10 @@ lean::inc(x_43);
 lean::dec(x_41);
 x_46 = l_lean_file__map_to__position(x_38, x_43);
 lean::inc(x_22);
-x_48 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1___boxed), 3, 2);
+x_48 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1___boxed), 3, 2);
 lean::closure_set(x_48, 0, x_22);
 lean::closure_set(x_48, 1, x_16);
-x_49 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1;
+x_49 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1;
 x_50 = l_lean_profileit__pure___rarg(x_49, x_46, x_48, x_6);
 x_51 = lean::cnstr_get(x_50, 0);
 lean::inc(x_51);
@@ -589,140 +592,143 @@ x_53 = lean::cnstr_get(x_51, 1);
 lean::inc(x_53);
 if (lean::obj_tag(x_53) == 0)
 {
-obj* x_59; obj* x_62; obj* x_65; obj* x_69; obj* x_70; 
+obj* x_60; obj* x_63; obj* x_66; obj* x_70; obj* x_71; 
 lean::dec(x_25);
+lean::dec(x_4);
 lean::dec(x_19);
 lean::dec(x_22);
 lean::dec(x_46);
-x_59 = lean::cnstr_get(x_50, 1);
-lean::inc(x_59);
+x_60 = lean::cnstr_get(x_50, 1);
+lean::inc(x_60);
 lean::dec(x_50);
-x_62 = lean::cnstr_get(x_51, 0);
-lean::inc(x_62);
+x_63 = lean::cnstr_get(x_51, 0);
+lean::inc(x_63);
 lean::dec(x_51);
-x_65 = lean::cnstr_get(x_53, 0);
-lean::inc(x_65);
+x_66 = lean::cnstr_get(x_53, 0);
+lean::inc(x_66);
 lean::dec(x_53);
 lean::inc(x_0);
-x_69 = lean::apply_2(x_0, x_65, x_59);
-x_70 = lean::cnstr_get(x_69, 0);
-lean::inc(x_70);
-if (lean::obj_tag(x_70) == 0)
+x_70 = lean::apply_2(x_0, x_66, x_60);
+x_71 = lean::cnstr_get(x_70, 0);
+lean::inc(x_71);
+if (lean::obj_tag(x_71) == 0)
 {
-obj* x_74; obj* x_77; obj* x_79; obj* x_80; 
+obj* x_78; obj* x_81; obj* x_83; obj* x_84; 
 lean::dec(x_27);
-lean::dec(x_62);
-x_74 = lean::cnstr_get(x_69, 1);
-lean::inc(x_74);
-lean::dec(x_69);
-x_77 = lean::cnstr_get(x_70, 0);
-if (lean::is_exclusive(x_70)) {
- x_79 = x_70;
-} else {
- lean::inc(x_77);
- lean::dec(x_70);
- x_79 = lean::box(0);
-}
-if (lean::is_scalar(x_79)) {
- x_80 = lean::alloc_cnstr(0, 1, 0);
-} else {
- x_80 = x_79;
-}
-lean::cnstr_set(x_80, 0, x_77);
-x_7 = x_80;
-x_8 = x_74;
-goto lbl_9;
-}
-else
-{
-obj* x_82; obj* x_87; obj* x_88; 
+lean::dec(x_1);
+lean::dec(x_3);
+lean::dec(x_0);
+lean::dec(x_63);
+x_78 = lean::cnstr_get(x_70, 1);
+lean::inc(x_78);
 lean::dec(x_70);
-x_82 = lean::cnstr_get(x_69, 1);
-lean::inc(x_82);
-lean::dec(x_69);
-lean::inc(x_2);
-lean::inc(x_0);
-x_87 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__2(x_0, x_2, x_82);
-x_88 = lean::cnstr_get(x_87, 0);
-lean::inc(x_88);
-if (lean::obj_tag(x_88) == 0)
+x_81 = lean::cnstr_get(x_71, 0);
+if (lean::is_exclusive(x_71)) {
+ x_83 = x_71;
+} else {
+ lean::inc(x_81);
+ lean::dec(x_71);
+ x_83 = lean::box(0);
+}
+if (lean::is_scalar(x_83)) {
+ x_84 = lean::alloc_cnstr(0, 1, 0);
+} else {
+ x_84 = x_83;
+}
+lean::cnstr_set(x_84, 0, x_81);
+x_7 = x_84;
+x_8 = x_78;
+goto lbl_9;
+}
+else
 {
-obj* x_92; obj* x_95; obj* x_97; obj* x_98; 
+obj* x_86; obj* x_89; obj* x_90; 
+lean::dec(x_71);
+x_86 = lean::cnstr_get(x_70, 1);
+lean::inc(x_86);
+lean::dec(x_70);
+x_89 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__2(x_0, x_1, x_86);
+x_90 = lean::cnstr_get(x_89, 0);
+lean::inc(x_90);
+if (lean::obj_tag(x_90) == 0)
+{
+obj* x_95; obj* x_98; obj* x_100; obj* x_101; 
 lean::dec(x_27);
-lean::dec(x_62);
-x_92 = lean::cnstr_get(x_87, 1);
-lean::inc(x_92);
-lean::dec(x_87);
-x_95 = lean::cnstr_get(x_88, 0);
-if (lean::is_exclusive(x_88)) {
- x_97 = x_88;
+lean::dec(x_3);
+lean::dec(x_63);
+x_95 = lean::cnstr_get(x_89, 1);
+lean::inc(x_95);
+lean::dec(x_89);
+x_98 = lean::cnstr_get(x_90, 0);
+if (lean::is_exclusive(x_90)) {
+ x_100 = x_90;
 } else {
- lean::inc(x_95);
- lean::dec(x_88);
- x_97 = lean::box(0);
+ lean::inc(x_98);
+ lean::dec(x_90);
+ x_100 = lean::box(0);
 }
-if (lean::is_scalar(x_97)) {
- x_98 = lean::alloc_cnstr(0, 1, 0);
+if (lean::is_scalar(x_100)) {
+ x_101 = lean::alloc_cnstr(0, 1, 0);
 } else {
- x_98 = x_97;
+ x_101 = x_100;
 }
-lean::cnstr_set(x_98, 0, x_95);
-x_7 = x_98;
-x_8 = x_92;
+lean::cnstr_set(x_101, 0, x_98);
+x_7 = x_101;
+x_8 = x_95;
 goto lbl_9;
 }
 else
 {
-obj* x_99; 
-if (lean::is_exclusive(x_88)) {
- lean::cnstr_release(x_88, 0);
- x_99 = x_88;
+obj* x_102; 
+if (lean::is_exclusive(x_90)) {
+ lean::cnstr_release(x_90, 0);
+ x_102 = x_90;
 } else {
- lean::dec(x_88);
- x_99 = lean::box(0);
+ lean::dec(x_90);
+ x_102 = lean::box(0);
 }
-if (x_1 == 0)
+if (x_2 == 0)
 {
-obj* x_102; obj* x_106; obj* x_107; obj* x_108; 
+obj* x_105; obj* x_108; obj* x_109; obj* x_110; 
 lean::dec(x_27);
-lean::dec(x_62);
-x_102 = lean::cnstr_get(x_87, 1);
-lean::inc(x_102);
-lean::dec(x_87);
-lean::inc(x_4);
-x_106 = l_list_reverse___rarg(x_4);
-x_107 = lean::alloc_cnstr(1, 1, 0);
-lean::cnstr_set(x_107, 0, x_106);
-if (lean::is_scalar(x_99)) {
- x_108 = lean::alloc_cnstr(1, 1, 0);
+lean::dec(x_63);
+x_105 = lean::cnstr_get(x_89, 1);
+lean::inc(x_105);
+lean::dec(x_89);
+x_108 = l_list_reverse___rarg(x_3);
+x_109 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_109, 0, x_108);
+if (lean::is_scalar(x_102)) {
+ x_110 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_108 = x_99;
+ x_110 = x_102;
 }
-lean::cnstr_set(x_108, 0, x_107);
-x_7 = x_108;
-x_8 = x_102;
+lean::cnstr_set(x_110, 0, x_109);
+x_7 = x_110;
+x_8 = x_105;
 goto lbl_9;
 }
 else
 {
-obj* x_109; obj* x_112; obj* x_113; obj* x_114; obj* x_115; 
-x_109 = lean::cnstr_get(x_87, 1);
-lean::inc(x_109);
-lean::dec(x_87);
-x_112 = lean::alloc_cnstr(1, 2, 0);
-lean::cnstr_set(x_112, 0, x_62);
-lean::cnstr_set(x_112, 1, x_27);
-x_113 = l_list_reverse___rarg(x_112);
-x_114 = lean::alloc_cnstr(1, 1, 0);
-lean::cnstr_set(x_114, 0, x_113);
-if (lean::is_scalar(x_99)) {
- x_115 = lean::alloc_cnstr(1, 1, 0);
+obj* x_112; obj* x_115; obj* x_116; obj* x_117; obj* x_118; 
+lean::dec(x_3);
+x_112 = lean::cnstr_get(x_89, 1);
+lean::inc(x_112);
+lean::dec(x_89);
+x_115 = lean::alloc_cnstr(1, 2, 0);
+lean::cnstr_set(x_115, 0, x_63);
+lean::cnstr_set(x_115, 1, x_27);
+x_116 = l_list_reverse___rarg(x_115);
+x_117 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_117, 0, x_116);
+if (lean::is_scalar(x_102)) {
+ x_118 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_115 = x_99;
+ x_118 = x_102;
 }
-lean::cnstr_set(x_115, 0, x_114);
-x_7 = x_115;
-x_8 = x_109;
+lean::cnstr_set(x_118, 0, x_117);
+x_7 = x_118;
+x_8 = x_112;
 goto lbl_9;
 }
 }
@@ -730,597 +736,600 @@ goto lbl_9;
 }
 else
 {
-obj* x_116; obj* x_119; obj* x_122; obj* x_125; obj* x_127; obj* x_129; obj* x_130; obj* x_132; obj* x_133; 
-x_116 = lean::cnstr_get(x_53, 0);
-lean::inc(x_116);
+obj* x_120; obj* x_123; obj* x_126; obj* x_129; obj* x_131; obj* x_133; obj* x_134; obj* x_136; obj* x_137; 
+lean::dec(x_1);
+x_120 = lean::cnstr_get(x_53, 0);
+lean::inc(x_120);
 lean::dec(x_53);
-x_119 = lean::cnstr_get(x_50, 1);
-lean::inc(x_119);
+x_123 = lean::cnstr_get(x_50, 1);
+lean::inc(x_123);
 lean::dec(x_50);
-x_122 = lean::cnstr_get(x_51, 0);
-lean::inc(x_122);
+x_126 = lean::cnstr_get(x_51, 0);
+lean::inc(x_126);
 lean::dec(x_51);
-x_125 = lean::cnstr_get(x_116, 0);
-x_127 = lean::cnstr_get(x_116, 1);
-if (lean::is_exclusive(x_116)) {
- lean::cnstr_set(x_116, 0, lean::box(0));
- lean::cnstr_set(x_116, 1, lean::box(0));
- x_129 = x_116;
+x_129 = lean::cnstr_get(x_120, 0);
+x_131 = lean::cnstr_get(x_120, 1);
+if (lean::is_exclusive(x_120)) {
+ lean::cnstr_set(x_120, 0, lean::box(0));
+ lean::cnstr_set(x_120, 1, lean::box(0));
+ x_133 = x_120;
 } else {
- lean::inc(x_125);
- lean::inc(x_127);
- lean::dec(x_116);
- x_129 = lean::box(0);
+ lean::inc(x_129);
+ lean::inc(x_131);
+ lean::dec(x_120);
+ x_133 = lean::box(0);
 }
-x_130 = l_list_reverse___rarg(x_127);
+x_134 = l_list_reverse___rarg(x_131);
 lean::inc(x_0);
-x_132 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__3(x_0, x_130, x_119);
-x_133 = lean::cnstr_get(x_132, 0);
-lean::inc(x_133);
-if (lean::obj_tag(x_133) == 0)
+x_136 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__3(x_0, x_134, x_123);
+x_137 = lean::cnstr_get(x_136, 0);
+lean::inc(x_137);
+if (lean::obj_tag(x_137) == 0)
 {
-obj* x_143; obj* x_146; obj* x_148; obj* x_149; 
+obj* x_150; obj* x_153; obj* x_155; obj* x_156; 
 lean::dec(x_25);
 lean::dec(x_27);
+lean::dec(x_4);
+lean::dec(x_3);
+lean::dec(x_0);
 lean::dec(x_19);
 lean::dec(x_22);
 lean::dec(x_46);
-lean::dec(x_122);
-lean::dec(x_125);
+lean::dec(x_126);
+lean::dec(x_133);
 lean::dec(x_129);
-x_143 = lean::cnstr_get(x_132, 1);
-lean::inc(x_143);
-lean::dec(x_132);
-x_146 = lean::cnstr_get(x_133, 0);
-if (lean::is_exclusive(x_133)) {
- x_148 = x_133;
+x_150 = lean::cnstr_get(x_136, 1);
+lean::inc(x_150);
+lean::dec(x_136);
+x_153 = lean::cnstr_get(x_137, 0);
+if (lean::is_exclusive(x_137)) {
+ x_155 = x_137;
 } else {
- lean::inc(x_146);
- lean::dec(x_133);
- x_148 = lean::box(0);
+ lean::inc(x_153);
+ lean::dec(x_137);
+ x_155 = lean::box(0);
 }
-if (lean::is_scalar(x_148)) {
- x_149 = lean::alloc_cnstr(0, 1, 0);
+if (lean::is_scalar(x_155)) {
+ x_156 = lean::alloc_cnstr(0, 1, 0);
 } else {
- x_149 = x_148;
+ x_156 = x_155;
 }
-lean::cnstr_set(x_149, 0, x_146);
-x_7 = x_149;
-x_8 = x_143;
+lean::cnstr_set(x_156, 0, x_153);
+x_7 = x_156;
+x_8 = x_150;
 goto lbl_9;
 }
 else
 {
-obj* x_150; obj* x_151; obj* x_153; obj* x_156; obj* x_157; obj* x_158; obj* x_159; 
-if (lean::is_exclusive(x_133)) {
- lean::cnstr_release(x_133, 0);
- x_150 = x_133;
+obj* x_157; obj* x_158; obj* x_160; obj* x_163; obj* x_164; obj* x_165; obj* x_166; 
+if (lean::is_exclusive(x_137)) {
+ lean::cnstr_release(x_137, 0);
+ x_157 = x_137;
 } else {
- lean::dec(x_133);
- x_150 = lean::box(0);
+ lean::dec(x_137);
+ x_157 = lean::box(0);
 }
-x_151 = lean::cnstr_get(x_132, 1);
-if (lean::is_exclusive(x_132)) {
- lean::cnstr_release(x_132, 0);
- lean::cnstr_set(x_132, 1, lean::box(0));
- x_153 = x_132;
+x_158 = lean::cnstr_get(x_136, 1);
+if (lean::is_exclusive(x_136)) {
+ lean::cnstr_release(x_136, 0);
+ lean::cnstr_set(x_136, 1, lean::box(0));
+ x_160 = x_136;
 } else {
- lean::inc(x_151);
- lean::dec(x_132);
- x_153 = lean::box(0);
+ lean::inc(x_158);
+ lean::dec(x_136);
+ x_160 = lean::box(0);
 }
 lean::inc(x_25);
-lean::inc(x_122);
-x_156 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2___boxed), 3, 2);
-lean::closure_set(x_156, 0, x_122);
-lean::closure_set(x_156, 1, x_25);
-x_157 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2;
-x_158 = l_lean_profileit__pure___rarg(x_157, x_46, x_156, x_151);
-x_159 = lean::cnstr_get(x_158, 0);
-lean::inc(x_159);
-if (lean::obj_tag(x_159) == 0)
+lean::inc(x_126);
+x_163 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2___boxed), 3, 2);
+lean::closure_set(x_163, 0, x_126);
+lean::closure_set(x_163, 1, x_25);
+x_164 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2;
+x_165 = l_lean_profileit__pure___rarg(x_164, x_46, x_163, x_158);
+x_166 = lean::cnstr_get(x_165, 0);
+lean::inc(x_166);
+if (lean::obj_tag(x_166) == 0)
 {
+lean::dec(x_4);
 lean::dec(x_46);
-lean::dec(x_150);
-if (x_1 == 0)
+lean::dec(x_157);
+if (x_2 == 0)
 {
-obj* x_165; obj* x_167; obj* x_168; obj* x_172; obj* x_173; 
+obj* x_173; obj* x_175; obj* x_176; obj* x_179; obj* x_180; 
 lean::dec(x_27);
-lean::dec(x_122);
-x_165 = lean::cnstr_get(x_158, 1);
-if (lean::is_exclusive(x_158)) {
- lean::cnstr_release(x_158, 0);
- lean::cnstr_set(x_158, 1, lean::box(0));
- x_167 = x_158;
+lean::dec(x_126);
+x_173 = lean::cnstr_get(x_165, 1);
+if (lean::is_exclusive(x_165)) {
+ lean::cnstr_release(x_165, 0);
+ lean::cnstr_set(x_165, 1, lean::box(0));
+ x_175 = x_165;
 } else {
- lean::inc(x_165);
- lean::dec(x_158);
- x_167 = lean::box(0);
+ lean::inc(x_173);
+ lean::dec(x_165);
+ x_175 = lean::box(0);
 }
-x_168 = lean::cnstr_get(x_159, 0);
-lean::inc(x_168);
-lean::dec(x_159);
-lean::inc(x_0);
-x_172 = lean::apply_2(x_0, x_168, x_165);
-x_173 = lean::cnstr_get(x_172, 0);
-lean::inc(x_173);
-if (lean::obj_tag(x_173) == 0)
+x_176 = lean::cnstr_get(x_166, 0);
+lean::inc(x_176);
+lean::dec(x_166);
+x_179 = lean::apply_2(x_0, x_176, x_173);
+x_180 = lean::cnstr_get(x_179, 0);
+lean::inc(x_180);
+if (lean::obj_tag(x_180) == 0)
 {
-obj* x_182; obj* x_185; obj* x_187; obj* x_188; 
+obj* x_190; obj* x_193; obj* x_195; obj* x_196; 
 lean::dec(x_25);
+lean::dec(x_3);
 lean::dec(x_19);
 lean::dec(x_22);
-lean::dec(x_153);
-lean::dec(x_167);
-lean::dec(x_125);
+lean::dec(x_175);
+lean::dec(x_160);
+lean::dec(x_133);
 lean::dec(x_129);
-x_182 = lean::cnstr_get(x_172, 1);
-lean::inc(x_182);
-lean::dec(x_172);
-x_185 = lean::cnstr_get(x_173, 0);
-if (lean::is_exclusive(x_173)) {
- x_187 = x_173;
+x_190 = lean::cnstr_get(x_179, 1);
+lean::inc(x_190);
+lean::dec(x_179);
+x_193 = lean::cnstr_get(x_180, 0);
+if (lean::is_exclusive(x_180)) {
+ x_195 = x_180;
 } else {
- lean::inc(x_185);
- lean::dec(x_173);
- x_187 = lean::box(0);
+ lean::inc(x_193);
+ lean::dec(x_180);
+ x_195 = lean::box(0);
 }
-if (lean::is_scalar(x_187)) {
- x_188 = lean::alloc_cnstr(0, 1, 0);
+if (lean::is_scalar(x_195)) {
+ x_196 = lean::alloc_cnstr(0, 1, 0);
 } else {
- x_188 = x_187;
+ x_196 = x_195;
 }
-lean::cnstr_set(x_188, 0, x_185);
-x_7 = x_188;
-x_8 = x_182;
-goto lbl_9;
-}
-else
-{
-obj* x_189; obj* x_190; obj* x_192; obj* x_194; obj* x_195; obj* x_196; obj* x_197; obj* x_198; obj* x_199; 
-if (lean::is_exclusive(x_173)) {
- lean::cnstr_release(x_173, 0);
- x_189 = x_173;
-} else {
- lean::dec(x_173);
- x_189 = lean::box(0);
-}
-x_190 = lean::cnstr_get(x_172, 1);
-if (lean::is_exclusive(x_172)) {
- lean::cnstr_release(x_172, 0);
- x_192 = x_172;
-} else {
- lean::inc(x_190);
- lean::dec(x_172);
- x_192 = lean::box(0);
-}
-lean::inc(x_4);
-if (lean::is_scalar(x_192)) {
- x_194 = lean::alloc_cnstr(0, 2, 0);
-} else {
- x_194 = x_192;
-}
-lean::cnstr_set(x_194, 0, x_25);
-lean::cnstr_set(x_194, 1, x_4);
-if (lean::is_scalar(x_167)) {
- x_195 = lean::alloc_cnstr(0, 2, 0);
-} else {
- x_195 = x_167;
-}
-lean::cnstr_set(x_195, 0, x_22);
-lean::cnstr_set(x_195, 1, x_194);
-if (lean::is_scalar(x_153)) {
- x_196 = lean::alloc_cnstr(0, 2, 0);
-} else {
- x_196 = x_153;
-}
-lean::cnstr_set(x_196, 0, x_19);
-lean::cnstr_set(x_196, 1, x_195);
-if (lean::is_scalar(x_129)) {
- x_197 = lean::alloc_cnstr(0, 2, 0);
-} else {
- x_197 = x_129;
-}
-lean::cnstr_set(x_197, 0, x_125);
-lean::cnstr_set(x_197, 1, x_196);
-x_198 = lean::alloc_cnstr(0, 1, 0);
-lean::cnstr_set(x_198, 0, x_197);
-if (lean::is_scalar(x_189)) {
- x_199 = lean::alloc_cnstr(1, 1, 0);
-} else {
- x_199 = x_189;
-}
-lean::cnstr_set(x_199, 0, x_198);
-x_7 = x_199;
+lean::cnstr_set(x_196, 0, x_193);
+x_7 = x_196;
 x_8 = x_190;
 goto lbl_9;
 }
+else
+{
+obj* x_197; obj* x_198; obj* x_200; obj* x_201; obj* x_202; obj* x_203; obj* x_204; obj* x_205; obj* x_206; 
+if (lean::is_exclusive(x_180)) {
+ lean::cnstr_release(x_180, 0);
+ x_197 = x_180;
+} else {
+ lean::dec(x_180);
+ x_197 = lean::box(0);
+}
+x_198 = lean::cnstr_get(x_179, 1);
+if (lean::is_exclusive(x_179)) {
+ lean::cnstr_release(x_179, 0);
+ x_200 = x_179;
+} else {
+ lean::inc(x_198);
+ lean::dec(x_179);
+ x_200 = lean::box(0);
+}
+if (lean::is_scalar(x_200)) {
+ x_201 = lean::alloc_cnstr(0, 2, 0);
+} else {
+ x_201 = x_200;
+}
+lean::cnstr_set(x_201, 0, x_25);
+lean::cnstr_set(x_201, 1, x_3);
+if (lean::is_scalar(x_175)) {
+ x_202 = lean::alloc_cnstr(0, 2, 0);
+} else {
+ x_202 = x_175;
+}
+lean::cnstr_set(x_202, 0, x_22);
+lean::cnstr_set(x_202, 1, x_201);
+if (lean::is_scalar(x_160)) {
+ x_203 = lean::alloc_cnstr(0, 2, 0);
+} else {
+ x_203 = x_160;
+}
+lean::cnstr_set(x_203, 0, x_19);
+lean::cnstr_set(x_203, 1, x_202);
+if (lean::is_scalar(x_133)) {
+ x_204 = lean::alloc_cnstr(0, 2, 0);
+} else {
+ x_204 = x_133;
+}
+lean::cnstr_set(x_204, 0, x_129);
+lean::cnstr_set(x_204, 1, x_203);
+x_205 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_205, 0, x_204);
+if (lean::is_scalar(x_197)) {
+ x_206 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_206 = x_197;
+}
+lean::cnstr_set(x_206, 0, x_205);
+x_7 = x_206;
+x_8 = x_198;
+goto lbl_9;
+}
 }
 else
 {
-obj* x_200; obj* x_202; obj* x_203; obj* x_207; obj* x_208; 
-x_200 = lean::cnstr_get(x_158, 1);
-if (lean::is_exclusive(x_158)) {
- lean::cnstr_release(x_158, 0);
- lean::cnstr_set(x_158, 1, lean::box(0));
- x_202 = x_158;
+obj* x_208; obj* x_210; obj* x_211; obj* x_214; obj* x_215; 
+lean::dec(x_3);
+x_208 = lean::cnstr_get(x_165, 1);
+if (lean::is_exclusive(x_165)) {
+ lean::cnstr_release(x_165, 0);
+ lean::cnstr_set(x_165, 1, lean::box(0));
+ x_210 = x_165;
 } else {
- lean::inc(x_200);
- lean::dec(x_158);
- x_202 = lean::box(0);
+ lean::inc(x_208);
+ lean::dec(x_165);
+ x_210 = lean::box(0);
 }
-x_203 = lean::cnstr_get(x_159, 0);
-lean::inc(x_203);
-lean::dec(x_159);
-lean::inc(x_0);
-x_207 = lean::apply_2(x_0, x_203, x_200);
-x_208 = lean::cnstr_get(x_207, 0);
-lean::inc(x_208);
-if (lean::obj_tag(x_208) == 0)
+x_211 = lean::cnstr_get(x_166, 0);
+lean::inc(x_211);
+lean::dec(x_166);
+x_214 = lean::apply_2(x_0, x_211, x_208);
+x_215 = lean::cnstr_get(x_214, 0);
+lean::inc(x_215);
+if (lean::obj_tag(x_215) == 0)
 {
-obj* x_219; obj* x_222; obj* x_224; obj* x_225; 
-lean::dec(x_202);
+obj* x_226; obj* x_229; obj* x_231; obj* x_232; 
+lean::dec(x_210);
 lean::dec(x_25);
 lean::dec(x_27);
 lean::dec(x_19);
 lean::dec(x_22);
-lean::dec(x_153);
-lean::dec(x_122);
-lean::dec(x_125);
+lean::dec(x_160);
+lean::dec(x_126);
+lean::dec(x_133);
 lean::dec(x_129);
-x_219 = lean::cnstr_get(x_207, 1);
-lean::inc(x_219);
-lean::dec(x_207);
-x_222 = lean::cnstr_get(x_208, 0);
-if (lean::is_exclusive(x_208)) {
- x_224 = x_208;
+x_226 = lean::cnstr_get(x_214, 1);
+lean::inc(x_226);
+lean::dec(x_214);
+x_229 = lean::cnstr_get(x_215, 0);
+if (lean::is_exclusive(x_215)) {
+ x_231 = x_215;
 } else {
- lean::inc(x_222);
- lean::dec(x_208);
- x_224 = lean::box(0);
+ lean::inc(x_229);
+ lean::dec(x_215);
+ x_231 = lean::box(0);
 }
-if (lean::is_scalar(x_224)) {
- x_225 = lean::alloc_cnstr(0, 1, 0);
+if (lean::is_scalar(x_231)) {
+ x_232 = lean::alloc_cnstr(0, 1, 0);
 } else {
- x_225 = x_224;
+ x_232 = x_231;
 }
-lean::cnstr_set(x_225, 0, x_222);
-x_7 = x_225;
-x_8 = x_219;
+lean::cnstr_set(x_232, 0, x_229);
+x_7 = x_232;
+x_8 = x_226;
 goto lbl_9;
 }
 else
 {
-obj* x_226; obj* x_227; obj* x_229; obj* x_230; obj* x_231; obj* x_232; obj* x_233; obj* x_234; obj* x_235; obj* x_236; 
-if (lean::is_exclusive(x_208)) {
- lean::cnstr_release(x_208, 0);
- x_226 = x_208;
+obj* x_233; obj* x_234; obj* x_236; obj* x_237; obj* x_238; obj* x_239; obj* x_240; obj* x_241; obj* x_242; obj* x_243; 
+if (lean::is_exclusive(x_215)) {
+ lean::cnstr_release(x_215, 0);
+ x_233 = x_215;
 } else {
- lean::dec(x_208);
- x_226 = lean::box(0);
+ lean::dec(x_215);
+ x_233 = lean::box(0);
 }
-x_227 = lean::cnstr_get(x_207, 1);
-if (lean::is_exclusive(x_207)) {
- lean::cnstr_release(x_207, 0);
- x_229 = x_207;
+x_234 = lean::cnstr_get(x_214, 1);
+if (lean::is_exclusive(x_214)) {
+ lean::cnstr_release(x_214, 0);
+ x_236 = x_214;
 } else {
- lean::inc(x_227);
- lean::dec(x_207);
- x_229 = lean::box(0);
+ lean::inc(x_234);
+ lean::dec(x_214);
+ x_236 = lean::box(0);
 }
-x_230 = lean::alloc_cnstr(1, 2, 0);
-lean::cnstr_set(x_230, 0, x_122);
-lean::cnstr_set(x_230, 1, x_27);
-if (lean::is_scalar(x_229)) {
- x_231 = lean::alloc_cnstr(0, 2, 0);
+x_237 = lean::alloc_cnstr(1, 2, 0);
+lean::cnstr_set(x_237, 0, x_126);
+lean::cnstr_set(x_237, 1, x_27);
+if (lean::is_scalar(x_236)) {
+ x_238 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_231 = x_229;
+ x_238 = x_236;
 }
-lean::cnstr_set(x_231, 0, x_25);
-lean::cnstr_set(x_231, 1, x_230);
-if (lean::is_scalar(x_202)) {
- x_232 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_238, 0, x_25);
+lean::cnstr_set(x_238, 1, x_237);
+if (lean::is_scalar(x_210)) {
+ x_239 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_232 = x_202;
+ x_239 = x_210;
 }
-lean::cnstr_set(x_232, 0, x_22);
-lean::cnstr_set(x_232, 1, x_231);
-if (lean::is_scalar(x_153)) {
- x_233 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_239, 0, x_22);
+lean::cnstr_set(x_239, 1, x_238);
+if (lean::is_scalar(x_160)) {
+ x_240 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_233 = x_153;
+ x_240 = x_160;
 }
-lean::cnstr_set(x_233, 0, x_19);
-lean::cnstr_set(x_233, 1, x_232);
-if (lean::is_scalar(x_129)) {
- x_234 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_240, 0, x_19);
+lean::cnstr_set(x_240, 1, x_239);
+if (lean::is_scalar(x_133)) {
+ x_241 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_234 = x_129;
+ x_241 = x_133;
 }
-lean::cnstr_set(x_234, 0, x_125);
-lean::cnstr_set(x_234, 1, x_233);
-x_235 = lean::alloc_cnstr(0, 1, 0);
-lean::cnstr_set(x_235, 0, x_234);
-if (lean::is_scalar(x_226)) {
- x_236 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_241, 0, x_129);
+lean::cnstr_set(x_241, 1, x_240);
+x_242 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_242, 0, x_241);
+if (lean::is_scalar(x_233)) {
+ x_243 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_236 = x_226;
+ x_243 = x_233;
 }
-lean::cnstr_set(x_236, 0, x_235);
-x_7 = x_236;
-x_8 = x_227;
+lean::cnstr_set(x_243, 0, x_242);
+x_7 = x_243;
+x_8 = x_234;
 goto lbl_9;
 }
 }
 }
 else
 {
-obj* x_240; obj* x_242; obj* x_243; obj* x_245; obj* x_248; obj* x_249; obj* x_250; obj* x_252; obj* x_254; obj* x_256; obj* x_257; obj* x_259; obj* x_261; obj* x_262; obj* x_264; obj* x_266; obj* x_267; obj* x_269; 
+obj* x_247; obj* x_249; obj* x_250; obj* x_252; obj* x_254; obj* x_255; obj* x_256; obj* x_258; obj* x_260; obj* x_262; obj* x_263; obj* x_265; obj* x_266; obj* x_267; obj* x_269; obj* x_271; obj* x_272; obj* x_274; 
 lean::dec(x_25);
 lean::dec(x_22);
-lean::dec(x_129);
-x_240 = lean::cnstr_get(x_158, 1);
-if (lean::is_exclusive(x_158)) {
- lean::cnstr_release(x_158, 0);
- lean::cnstr_set(x_158, 1, lean::box(0));
- x_242 = x_158;
+lean::dec(x_133);
+x_247 = lean::cnstr_get(x_165, 1);
+if (lean::is_exclusive(x_165)) {
+ lean::cnstr_release(x_165, 0);
+ lean::cnstr_set(x_165, 1, lean::box(0));
+ x_249 = x_165;
 } else {
- lean::inc(x_240);
- lean::dec(x_158);
- x_242 = lean::box(0);
+ lean::inc(x_247);
+ lean::dec(x_165);
+ x_249 = lean::box(0);
 }
-x_243 = lean::cnstr_get(x_159, 0);
-if (lean::is_exclusive(x_159)) {
- lean::cnstr_set(x_159, 0, lean::box(0));
- x_245 = x_159;
+x_250 = lean::cnstr_get(x_166, 0);
+if (lean::is_exclusive(x_166)) {
+ lean::cnstr_set(x_166, 0, lean::box(0));
+ x_252 = x_166;
 } else {
- lean::inc(x_243);
- lean::dec(x_159);
- x_245 = lean::box(0);
+ lean::inc(x_250);
+ lean::dec(x_166);
+ x_252 = lean::box(0);
 }
-lean::inc(x_243);
-lean::inc(x_3);
-x_248 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3___boxed), 4, 3);
-lean::closure_set(x_248, 0, x_3);
-lean::closure_set(x_248, 1, x_19);
-lean::closure_set(x_248, 2, x_243);
-x_249 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3;
-x_250 = l_lean_profileit__pure___rarg(x_249, x_46, x_248, x_240);
+lean::inc(x_250);
+x_254 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3___boxed), 4, 3);
+lean::closure_set(x_254, 0, x_4);
+lean::closure_set(x_254, 1, x_19);
+lean::closure_set(x_254, 2, x_250);
+x_255 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3;
+x_256 = l_lean_profileit__pure___rarg(x_255, x_46, x_254, x_247);
 lean::dec(x_46);
-x_252 = lean::cnstr_get(x_250, 0);
-x_254 = lean::cnstr_get(x_250, 1);
-if (lean::is_exclusive(x_250)) {
- lean::cnstr_set(x_250, 0, lean::box(0));
- lean::cnstr_set(x_250, 1, lean::box(0));
- x_256 = x_250;
+x_258 = lean::cnstr_get(x_256, 0);
+x_260 = lean::cnstr_get(x_256, 1);
+if (lean::is_exclusive(x_256)) {
+ lean::cnstr_set(x_256, 0, lean::box(0));
+ lean::cnstr_set(x_256, 1, lean::box(0));
+ x_262 = x_256;
 } else {
- lean::inc(x_252);
- lean::inc(x_254);
- lean::dec(x_250);
- x_256 = lean::box(0);
+ lean::inc(x_258);
+ lean::inc(x_260);
+ lean::dec(x_256);
+ x_262 = lean::box(0);
 }
-x_257 = lean::cnstr_get(x_252, 5);
-lean::inc(x_257);
-x_259 = l_list_reverse___rarg(x_257);
-lean::inc(x_0);
-x_261 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__4(x_0, x_259, x_254);
-x_262 = lean::cnstr_get(x_261, 0);
-x_264 = lean::cnstr_get(x_261, 1);
-if (lean::is_exclusive(x_261)) {
- lean::cnstr_set(x_261, 0, lean::box(0));
- lean::cnstr_set(x_261, 1, lean::box(0));
- x_266 = x_261;
+x_263 = lean::cnstr_get(x_258, 5);
+lean::inc(x_263);
+x_265 = l_list_reverse___rarg(x_263);
+x_266 = l_list_mmap_x_27___main___at_lean_run__frontend___spec__4(x_0, x_265, x_260);
+x_267 = lean::cnstr_get(x_266, 0);
+x_269 = lean::cnstr_get(x_266, 1);
+if (lean::is_exclusive(x_266)) {
+ lean::cnstr_set(x_266, 0, lean::box(0));
+ lean::cnstr_set(x_266, 1, lean::box(0));
+ x_271 = x_266;
 } else {
- lean::inc(x_262);
- lean::inc(x_264);
- lean::dec(x_261);
- x_266 = lean::box(0);
+ lean::inc(x_267);
+ lean::inc(x_269);
+ lean::dec(x_266);
+ x_271 = lean::box(0);
 }
-if (lean::obj_tag(x_262) == 0)
+if (lean::obj_tag(x_267) == 0)
 {
-obj* x_282; obj* x_284; obj* x_285; 
-lean::dec(x_252);
-lean::dec(x_242);
-lean::dec(x_243);
-lean::dec(x_245);
-lean::dec(x_27);
-lean::dec(x_266);
-lean::dec(x_256);
-lean::dec(x_153);
-lean::dec(x_150);
-lean::dec(x_122);
-lean::dec(x_125);
-x_282 = lean::cnstr_get(x_262, 0);
-if (lean::is_exclusive(x_262)) {
- x_284 = x_262;
-} else {
- lean::inc(x_282);
- lean::dec(x_262);
- x_284 = lean::box(0);
-}
-if (lean::is_scalar(x_284)) {
- x_285 = lean::alloc_cnstr(0, 1, 0);
-} else {
- x_285 = x_284;
-}
-lean::cnstr_set(x_285, 0, x_282);
-x_7 = x_285;
-x_8 = x_264;
-goto lbl_9;
-}
-else
-{
-obj* x_287; uint8 x_288; 
+obj* x_288; obj* x_290; obj* x_291; 
+lean::dec(x_249);
+lean::dec(x_258);
 lean::dec(x_262);
-x_287 = l_lean_parser_module_eoi;
-x_288 = l_lean_parser_syntax_is__of__kind___main(x_287, x_243);
-lean::dec(x_243);
-if (x_288 == 0)
-{
-obj* x_291; 
-lean::dec(x_150);
-x_291 = lean::box(0);
-x_267 = x_291;
-goto lbl_268;
-}
-else
-{
-obj* x_299; 
 lean::dec(x_252);
-lean::dec(x_242);
-lean::dec(x_245);
-lean::dec(x_266);
-lean::dec(x_256);
-lean::dec(x_153);
-lean::dec(x_125);
-x_299 = lean::box(0);
-x_269 = x_299;
-goto lbl_270;
+lean::dec(x_27);
+lean::dec(x_3);
+lean::dec(x_250);
+lean::dec(x_271);
+lean::dec(x_157);
+lean::dec(x_160);
+lean::dec(x_126);
+lean::dec(x_129);
+x_288 = lean::cnstr_get(x_267, 0);
+if (lean::is_exclusive(x_267)) {
+ x_290 = x_267;
+} else {
+ lean::inc(x_288);
+ lean::dec(x_267);
+ x_290 = lean::box(0);
 }
+if (lean::is_scalar(x_290)) {
+ x_291 = lean::alloc_cnstr(0, 1, 0);
+} else {
+ x_291 = x_290;
 }
-lbl_268:
+lean::cnstr_set(x_291, 0, x_288);
+x_7 = x_291;
+x_8 = x_269;
+goto lbl_9;
+}
+else
 {
+obj* x_293; uint8 x_294; 
 lean::dec(x_267);
-if (x_1 == 0)
+x_293 = l_lean_parser_module_eoi;
+x_294 = l_lean_parser_syntax_is__of__kind___main(x_293, x_250);
+lean::dec(x_250);
+if (x_294 == 0)
 {
-obj* x_303; obj* x_305; obj* x_308; obj* x_309; obj* x_310; obj* x_311; obj* x_312; obj* x_313; 
+obj* x_297; 
+lean::dec(x_157);
+x_297 = lean::box(0);
+x_272 = x_297;
+goto lbl_273;
+}
+else
+{
+obj* x_305; 
+lean::dec(x_249);
+lean::dec(x_258);
+lean::dec(x_262);
+lean::dec(x_252);
+lean::dec(x_271);
+lean::dec(x_160);
+lean::dec(x_129);
+x_305 = lean::box(0);
+x_274 = x_305;
+goto lbl_275;
+}
+}
+lbl_273:
+{
+lean::dec(x_272);
+if (x_2 == 0)
+{
+obj* x_309; obj* x_311; obj* x_313; obj* x_314; obj* x_315; obj* x_316; obj* x_317; obj* x_318; 
 lean::dec(x_27);
-lean::dec(x_122);
-x_303 = lean::cnstr_get(x_252, 6);
-lean::inc(x_303);
-x_305 = lean::cnstr_get(x_252, 7);
-lean::inc(x_305);
-lean::inc(x_4);
-if (lean::is_scalar(x_266)) {
- x_308 = lean::alloc_cnstr(0, 2, 0);
+lean::dec(x_126);
+x_309 = lean::cnstr_get(x_258, 6);
+lean::inc(x_309);
+x_311 = lean::cnstr_get(x_258, 7);
+lean::inc(x_311);
+if (lean::is_scalar(x_271)) {
+ x_313 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_308 = x_266;
+ x_313 = x_271;
 }
-lean::cnstr_set(x_308, 0, x_305);
-lean::cnstr_set(x_308, 1, x_4);
-if (lean::is_scalar(x_256)) {
- x_309 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_313, 0, x_311);
+lean::cnstr_set(x_313, 1, x_3);
+if (lean::is_scalar(x_262)) {
+ x_314 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_309 = x_256;
+ x_314 = x_262;
 }
-lean::cnstr_set(x_309, 0, x_303);
-lean::cnstr_set(x_309, 1, x_308);
-if (lean::is_scalar(x_242)) {
- x_310 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_314, 0, x_309);
+lean::cnstr_set(x_314, 1, x_313);
+if (lean::is_scalar(x_249)) {
+ x_315 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_310 = x_242;
+ x_315 = x_249;
 }
-lean::cnstr_set(x_310, 0, x_252);
-lean::cnstr_set(x_310, 1, x_309);
-if (lean::is_scalar(x_153)) {
- x_311 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_315, 0, x_258);
+lean::cnstr_set(x_315, 1, x_314);
+if (lean::is_scalar(x_160)) {
+ x_316 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_311 = x_153;
+ x_316 = x_160;
 }
-lean::cnstr_set(x_311, 0, x_125);
-lean::cnstr_set(x_311, 1, x_310);
-x_312 = lean::alloc_cnstr(0, 1, 0);
-lean::cnstr_set(x_312, 0, x_311);
-if (lean::is_scalar(x_245)) {
- x_313 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_316, 0, x_129);
+lean::cnstr_set(x_316, 1, x_315);
+x_317 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_317, 0, x_316);
+if (lean::is_scalar(x_252)) {
+ x_318 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_313 = x_245;
+ x_318 = x_252;
 }
-lean::cnstr_set(x_313, 0, x_312);
-x_7 = x_313;
-x_8 = x_264;
+lean::cnstr_set(x_318, 0, x_317);
+x_7 = x_318;
+x_8 = x_269;
 goto lbl_9;
 }
 else
 {
-obj* x_314; obj* x_316; obj* x_318; obj* x_319; obj* x_320; obj* x_321; obj* x_322; obj* x_323; obj* x_324; 
-x_314 = lean::cnstr_get(x_252, 6);
-lean::inc(x_314);
-x_316 = lean::cnstr_get(x_252, 7);
-lean::inc(x_316);
-x_318 = lean::alloc_cnstr(1, 2, 0);
-lean::cnstr_set(x_318, 0, x_122);
-lean::cnstr_set(x_318, 1, x_27);
-if (lean::is_scalar(x_266)) {
- x_319 = lean::alloc_cnstr(0, 2, 0);
+obj* x_320; obj* x_322; obj* x_324; obj* x_325; obj* x_326; obj* x_327; obj* x_328; obj* x_329; obj* x_330; 
+lean::dec(x_3);
+x_320 = lean::cnstr_get(x_258, 6);
+lean::inc(x_320);
+x_322 = lean::cnstr_get(x_258, 7);
+lean::inc(x_322);
+x_324 = lean::alloc_cnstr(1, 2, 0);
+lean::cnstr_set(x_324, 0, x_126);
+lean::cnstr_set(x_324, 1, x_27);
+if (lean::is_scalar(x_271)) {
+ x_325 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_319 = x_266;
+ x_325 = x_271;
 }
-lean::cnstr_set(x_319, 0, x_316);
-lean::cnstr_set(x_319, 1, x_318);
-if (lean::is_scalar(x_256)) {
- x_320 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_325, 0, x_322);
+lean::cnstr_set(x_325, 1, x_324);
+if (lean::is_scalar(x_262)) {
+ x_326 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_320 = x_256;
+ x_326 = x_262;
 }
-lean::cnstr_set(x_320, 0, x_314);
-lean::cnstr_set(x_320, 1, x_319);
-if (lean::is_scalar(x_242)) {
- x_321 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_326, 0, x_320);
+lean::cnstr_set(x_326, 1, x_325);
+if (lean::is_scalar(x_249)) {
+ x_327 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_321 = x_242;
+ x_327 = x_249;
 }
-lean::cnstr_set(x_321, 0, x_252);
-lean::cnstr_set(x_321, 1, x_320);
-if (lean::is_scalar(x_153)) {
- x_322 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_327, 0, x_258);
+lean::cnstr_set(x_327, 1, x_326);
+if (lean::is_scalar(x_160)) {
+ x_328 = lean::alloc_cnstr(0, 2, 0);
 } else {
- x_322 = x_153;
+ x_328 = x_160;
 }
-lean::cnstr_set(x_322, 0, x_125);
-lean::cnstr_set(x_322, 1, x_321);
-x_323 = lean::alloc_cnstr(0, 1, 0);
-lean::cnstr_set(x_323, 0, x_322);
-if (lean::is_scalar(x_245)) {
- x_324 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_328, 0, x_129);
+lean::cnstr_set(x_328, 1, x_327);
+x_329 = lean::alloc_cnstr(0, 1, 0);
+lean::cnstr_set(x_329, 0, x_328);
+if (lean::is_scalar(x_252)) {
+ x_330 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_324 = x_245;
+ x_330 = x_252;
 }
-lean::cnstr_set(x_324, 0, x_323);
-x_7 = x_324;
-x_8 = x_264;
-goto lbl_9;
-}
-}
-lbl_270:
-{
-lean::dec(x_269);
-if (x_1 == 0)
-{
-obj* x_329; obj* x_330; obj* x_331; 
-lean::dec(x_27);
-lean::dec(x_122);
-lean::inc(x_4);
-x_329 = l_list_reverse___rarg(x_4);
-x_330 = lean::alloc_cnstr(1, 1, 0);
 lean::cnstr_set(x_330, 0, x_329);
-if (lean::is_scalar(x_150)) {
- x_331 = lean::alloc_cnstr(1, 1, 0);
-} else {
- x_331 = x_150;
+x_7 = x_330;
+x_8 = x_269;
+goto lbl_9;
 }
-lean::cnstr_set(x_331, 0, x_330);
-x_7 = x_331;
-x_8 = x_264;
+}
+lbl_275:
+{
+lean::dec(x_274);
+if (x_2 == 0)
+{
+obj* x_334; obj* x_335; obj* x_336; 
+lean::dec(x_27);
+lean::dec(x_126);
+x_334 = l_list_reverse___rarg(x_3);
+x_335 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_335, 0, x_334);
+if (lean::is_scalar(x_157)) {
+ x_336 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_336 = x_157;
+}
+lean::cnstr_set(x_336, 0, x_335);
+x_7 = x_336;
+x_8 = x_269;
 goto lbl_9;
 }
 else
 {
-obj* x_332; obj* x_333; obj* x_334; obj* x_335; 
-x_332 = lean::alloc_cnstr(1, 2, 0);
-lean::cnstr_set(x_332, 0, x_122);
-lean::cnstr_set(x_332, 1, x_27);
-x_333 = l_list_reverse___rarg(x_332);
-x_334 = lean::alloc_cnstr(1, 1, 0);
-lean::cnstr_set(x_334, 0, x_333);
-if (lean::is_scalar(x_150)) {
- x_335 = lean::alloc_cnstr(1, 1, 0);
+obj* x_338; obj* x_339; obj* x_340; obj* x_341; 
+lean::dec(x_3);
+x_338 = lean::alloc_cnstr(1, 2, 0);
+lean::cnstr_set(x_338, 0, x_126);
+lean::cnstr_set(x_338, 1, x_27);
+x_339 = l_list_reverse___rarg(x_338);
+x_340 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_340, 0, x_339);
+if (lean::is_scalar(x_157)) {
+ x_341 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_335 = x_150;
+ x_341 = x_157;
 }
-lean::cnstr_set(x_335, 0, x_334);
-x_7 = x_335;
-x_8 = x_264;
+lean::cnstr_set(x_341, 0, x_340);
+x_7 = x_341;
+x_8 = x_269;
 goto lbl_9;
 }
 }
@@ -1331,79 +1340,96 @@ lbl_9:
 {
 if (lean::obj_tag(x_7) == 0)
 {
-obj* x_340; obj* x_342; obj* x_343; obj* x_344; 
-lean::dec(x_4);
-lean::dec(x_3);
-lean::dec(x_0);
-lean::dec(x_2);
-x_340 = lean::cnstr_get(x_7, 0);
+obj* x_342; obj* x_344; obj* x_345; obj* x_346; obj* x_347; 
+x_342 = lean::cnstr_get(x_7, 0);
 if (lean::is_exclusive(x_7)) {
- x_342 = x_7;
+ x_344 = x_7;
 } else {
- lean::inc(x_340);
+ lean::inc(x_342);
  lean::dec(x_7);
- x_342 = lean::box(0);
+ x_344 = lean::box(0);
 }
-if (lean::is_scalar(x_342)) {
- x_343 = lean::alloc_cnstr(0, 1, 0);
+if (lean::is_scalar(x_344)) {
+ x_345 = lean::alloc_cnstr(0, 1, 0);
 } else {
- x_343 = x_342;
+ x_345 = x_344;
 }
-lean::cnstr_set(x_343, 0, x_340);
-x_344 = lean::alloc_cnstr(0, 2, 0);
-lean::cnstr_set(x_344, 0, x_343);
-lean::cnstr_set(x_344, 1, x_8);
-return x_344;
+lean::cnstr_set(x_345, 0, x_342);
+x_346 = lean::alloc_cnstr(1, 1, 0);
+lean::cnstr_set(x_346, 0, x_345);
+x_347 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_347, 0, x_346);
+lean::cnstr_set(x_347, 1, x_8);
+return x_347;
 }
 else
 {
-obj* x_345; obj* x_347; 
-x_345 = lean::cnstr_get(x_7, 0);
+obj* x_348; obj* x_350; 
+x_348 = lean::cnstr_get(x_7, 0);
 if (lean::is_exclusive(x_7)) {
  lean::cnstr_set(x_7, 0, lean::box(0));
- x_347 = x_7;
+ x_350 = x_7;
 } else {
- lean::inc(x_345);
+ lean::inc(x_348);
  lean::dec(x_7);
- x_347 = lean::box(0);
+ x_350 = lean::box(0);
 }
-if (lean::obj_tag(x_345) == 0)
+if (lean::obj_tag(x_348) == 0)
 {
-obj* x_349; 
-lean::dec(x_347);
-x_349 = lean::cnstr_get(x_345, 0);
-lean::inc(x_349);
-lean::dec(x_345);
-x_5 = x_349;
-x_6 = x_8;
-goto _start;
+obj* x_352; obj* x_354; obj* x_355; obj* x_356; 
+lean::dec(x_350);
+x_352 = lean::cnstr_get(x_348, 0);
+if (lean::is_exclusive(x_348)) {
+ x_354 = x_348;
+} else {
+ lean::inc(x_352);
+ lean::dec(x_348);
+ x_354 = lean::box(0);
+}
+if (lean::is_scalar(x_354)) {
+ x_355 = lean::alloc_cnstr(0, 1, 0);
+} else {
+ x_355 = x_354;
+}
+lean::cnstr_set(x_355, 0, x_352);
+x_356 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_356, 0, x_355);
+lean::cnstr_set(x_356, 1, x_8);
+return x_356;
 }
 else
 {
-obj* x_357; obj* x_360; obj* x_361; 
-lean::dec(x_4);
-lean::dec(x_3);
-lean::dec(x_0);
-lean::dec(x_2);
-x_357 = lean::cnstr_get(x_345, 0);
-lean::inc(x_357);
-lean::dec(x_345);
-if (lean::is_scalar(x_347)) {
+obj* x_357; obj* x_359; obj* x_360; obj* x_361; obj* x_362; 
+x_357 = lean::cnstr_get(x_348, 0);
+if (lean::is_exclusive(x_348)) {
+ x_359 = x_348;
+} else {
+ lean::inc(x_357);
+ lean::dec(x_348);
+ x_359 = lean::box(0);
+}
+if (lean::is_scalar(x_350)) {
  x_360 = lean::alloc_cnstr(1, 1, 0);
 } else {
- x_360 = x_347;
+ x_360 = x_350;
 }
 lean::cnstr_set(x_360, 0, x_357);
-x_361 = lean::alloc_cnstr(0, 2, 0);
+if (lean::is_scalar(x_359)) {
+ x_361 = lean::alloc_cnstr(1, 1, 0);
+} else {
+ x_361 = x_359;
+}
 lean::cnstr_set(x_361, 0, x_360);
-lean::cnstr_set(x_361, 1, x_8);
-return x_361;
+x_362 = lean::alloc_cnstr(0, 2, 0);
+lean::cnstr_set(x_362, 0, x_361);
+lean::cnstr_set(x_362, 1, x_8);
+return x_362;
 }
 }
 }
 }
 }
-obj* _init_l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1() {
+obj* _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1() {
 _start:
 {
 obj* x_0; obj* x_1; obj* x_2; obj* x_3; obj* x_4; obj* x_5; uint8 x_6; obj* x_7; 
@@ -1418,10 +1444,10 @@ x_7 = l_lean_kvmap_set__bool(x_5, x_4, x_6);
 return x_7;
 }
 }
-obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg(obj* x_0, uint8 x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6, obj* x_7) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6(obj* x_0, uint8 x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6, obj* x_7) {
 _start:
 {
-obj* x_8; obj* x_10; obj* x_13; obj* x_16; obj* x_17; obj* x_18; obj* x_20; obj* x_22; obj* x_23; obj* x_24; obj* x_25; obj* x_26; 
+obj* x_8; obj* x_10; obj* x_13; obj* x_16; obj* x_17; obj* x_18; obj* x_20; obj* x_22; obj* x_23; obj* x_24; obj* x_25; obj* x_26; obj* x_27; obj* x_28; obj* x_29; 
 x_8 = lean::cnstr_get(x_2, 0);
 lean::inc(x_8);
 x_10 = lean::cnstr_get(x_8, 0);
@@ -1434,7 +1460,7 @@ x_16 = l_lean_expander_builtin__transformers;
 x_17 = lean::alloc_cnstr(0, 2, 0);
 lean::cnstr_set(x_17, 0, x_13);
 lean::cnstr_set(x_17, 1, x_16);
-x_18 = l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1;
+x_18 = l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1;
 lean::inc(x_6);
 x_20 = l_lean_elaborator_mk__state(x_6, x_18);
 lean::inc(x_7);
@@ -1450,8 +1476,25 @@ lean::cnstr_set(x_24, 1, x_23);
 x_25 = lean::alloc_cnstr(0, 2, 0);
 lean::cnstr_set(x_25, 0, x_3);
 lean::cnstr_set(x_25, 1, x_24);
-x_26 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6(x_0, x_1, x_4, x_6, x_7, x_25, x_5);
-return x_26;
+x_26 = lean::box(x_1);
+x_27 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___boxed), 7, 5);
+lean::closure_set(x_27, 0, x_0);
+lean::closure_set(x_27, 1, x_4);
+lean::closure_set(x_27, 2, x_26);
+lean::closure_set(x_27, 3, x_7);
+lean::closure_set(x_27, 4, x_6);
+x_28 = lean::alloc_closure(reinterpret_cast<void*>(l_io_prim_iterate__aux___rarg), 4, 1);
+lean::closure_set(x_28, 0, x_27);
+x_29 = lean::fixpoint2(x_28, x_25, x_5);
+return x_29;
+}
+}
+obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg(obj* x_0, uint8 x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6, obj* x_7) {
+_start:
+{
+obj* x_8; 
+x_8 = l_io_prim_iterate___at_lean_run__frontend___spec__6(x_0, x_1, x_2, x_3, x_4, x_5, x_6, x_7);
+return x_8;
 }
 }
 obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5(obj* x_0, obj* x_1) {
@@ -1707,7 +1750,7 @@ x_105 = lean::alloc_cnstr(0, 2, 0);
 lean::cnstr_set(x_105, 0, x_103);
 lean::cnstr_set(x_105, 1, x_29);
 x_106 = lean::box(0);
-x_107 = l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg(x_2, x_3, x_29, x_63, x_68, x_89, x_105, x_106);
+x_107 = l_io_prim_iterate___at_lean_run__frontend___spec__6(x_2, x_3, x_29, x_63, x_68, x_89, x_105, x_106);
 return x_107;
 }
 }
@@ -1715,42 +1758,51 @@ return x_107;
 }
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1___boxed(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1___boxed(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
-x_3 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__1(x_0, x_1, x_2);
+x_3 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__1(x_0, x_1, x_2);
 lean::dec(x_2);
 return x_3;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2___boxed(obj* x_0, obj* x_1, obj* x_2) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2___boxed(obj* x_0, obj* x_1, obj* x_2) {
 _start:
 {
 obj* x_3; 
-x_3 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__2(x_0, x_1, x_2);
+x_3 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__2(x_0, x_1, x_2);
 lean::dec(x_2);
 return x_3;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3) {
 _start:
 {
 obj* x_4; 
-x_4 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6___lambda__3(x_0, x_1, x_2, x_3);
+x_4 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__3(x_0, x_1, x_2, x_3);
 lean::dec(x_3);
 return x_4;
 }
 }
-obj* l_io_prim_iterate___main___at_lean_run__frontend___spec__6___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6) {
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6) {
 _start:
 {
 uint8 x_7; obj* x_8; 
-x_7 = lean::unbox(x_1);
-x_8 = l_io_prim_iterate___main___at_lean_run__frontend___spec__6(x_0, x_7, x_2, x_3, x_4, x_5, x_6);
+x_7 = lean::unbox(x_2);
+x_8 = l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4(x_0, x_1, x_7, x_3, x_4, x_5, x_6);
 return x_8;
 }
 }
+obj* l_io_prim_iterate___at_lean_run__frontend___spec__6___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6, obj* x_7) {
+_start:
+{
+uint8 x_8; obj* x_9; 
+x_8 = lean::unbox(x_1);
+x_9 = l_io_prim_iterate___at_lean_run__frontend___spec__6(x_0, x_8, x_2, x_3, x_4, x_5, x_6, x_7);
+return x_9;
+}
+}
 obj* l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___boxed(obj* x_0, obj* x_1, obj* x_2, obj* x_3, obj* x_4, obj* x_5, obj* x_6, obj* x_7) {
 _start:
 {
@@ -2333,14 +2385,14 @@ void initialize_init_lean_frontend() {
  initialize_init_io();
  l_list_mmap_x_27___main___at_lean_run__frontend___spec__1___closed__1 = _init_l_list_mmap_x_27___main___at_lean_run__frontend___spec__1___closed__1();
 lean::mark_persistent(l_list_mmap_x_27___main___at_lean_run__frontend___spec__1___closed__1);
- l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1 = _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1();
-lean::mark_persistent(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__1);
- l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2 = _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2();
-lean::mark_persistent(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__2);
- l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3 = _init_l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3();
-lean::mark_persistent(l_io_prim_iterate___main___at_lean_run__frontend___spec__6___closed__3);
- l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1 = _init_l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1();
-lean::mark_persistent(l_io_prim_iterate__eio___at_lean_run__frontend___spec__5___rarg___closed__1);
+ l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1 = _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1();
+lean::mark_persistent(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__1);
+ l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2 = _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2();
+lean::mark_persistent(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__2);
+ l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3 = _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3();
+lean::mark_persistent(l_io_prim_iterate___at_lean_run__frontend___spec__6___lambda__4___closed__3);
+ l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1 = _init_l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1();
+lean::mark_persistent(l_io_prim_iterate___at_lean_run__frontend___spec__6___closed__1);
  l_lean_process__file___lambda__1___closed__1 = _init_l_lean_process__file___lambda__1___closed__1();
 lean::mark_persistent(l_lean_process__file___lambda__1___closed__1);
  l_lean_process__file___lambda__1___closed__2 = _init_l_lean_process__file___lambda__1___closed__2();