lean4-htt/tests/elab/isDefEqCheckAssignmentBug.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

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Text

import Lean
open Lean
open Lean.Meta
def f (x : Type) := x
def tst : MetaM Unit := do
let m1 ← mkFreshExprMVar none
withLocalDeclD `x m1 fun x => do
trace[Meta.debug] "{x} : {← inferType x}"
trace[Meta.debug] "{m1} : {← inferType m1}"
let m2 ← mkFreshExprMVar (mkSort levelOne)
let t ← mkAppM ``f #[m2]
trace[Meta.debug] "{m2} : {← inferType m2}"
unless (← fullApproxDefEq <| isDefEq m1 t) do -- m1 := f m3 -- where `m3` has a smaller scope than `m2`
throwError "isDefEq failed"
trace[Meta.debug] "{m2} : {← inferType m2}"
trace[Meta.debug] "{m1} : {← inferType m1}"
let e ← mkForallFVars #[x] m2 -- `forall (x : f ?m2), ?m2`
trace[Meta.debug] "{e} : {← inferType e}"
return ()
set_option trace.Meta.isDefEq true
set_option trace.Meta.debug true
#eval tst