max/lean4-htt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 2
Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
33151 commits 1 branch 0 tags 5.3 GiB
Find a file
Sebastian Ullrich 8d3be96024
fix: tactics in terms in tactics may break incremental reporting (#4436) 
A pending tactic mvar managed to escape into an unexpected context in
specific circumstances.

```lean
example : True := by
  · rw [show 0 = 0 by rfl]
```
* Term elaboration of the `show` creates a pending mvar for the `by rfl`
proof
* `rw` fails with an exception because the pattern does not occur in the
target
* `cdot` catches the exception and admits the goal
* `Term.runTactic` [synthesizes all pending mvars from the tactic's
execution](5f9dedfe5e/src/Lean/Elab/SyntheticMVars.lean (L350)),
including the `by rfl` proof. But this would not have happened without
`cdot` as the exception would have skipped that invocation!
* Now incrementality is confused because the nested `by rfl` proof is
unexpectedly run in the same context as the top-level proof, writing to
the wrong promise, and the error message is lost

Solution: disable incrementality for these pending mvars
2024-06-12 14:59:24 +00:00
.github chore: CI: pr-release: install elan (#4361) 2024-06-05 08:20:57 +00:00
doc chore: simplify lean4checker step in release checklist (#4355) 2024-06-05 04:14:36 +00:00
images chore(CMakeLists.txt): move Lean logo to make sure we can test leanemacs without installing Lean 2015-01-31 17:38:49 -08:00
nix feat: incremental elaboration of definition headers, bodies, and tactics (#3940) 2024-05-22 13:23:30 +00:00
releases_drafts chore: clear releases_drafts for start of 4.10.0 (#4377) 2024-06-06 23:45:54 +00:00
script chore: add ./script/rebase-stage0.sh (#3984) 2024-05-02 12:26:25 +00:00
src fix: tactics in terms in tactics may break incremental reporting (#4436) 2024-06-12 14:59:24 +00:00
stage0 chore: update stage0 2024-06-07 13:59:22 +02:00
tests fix: tactics in terms in tactics may break incremental reporting (#4436) 2024-06-12 14:59:24 +00:00
.gitattributes chore: Do not hide stage0/src/stdlib_flags.h from diffs 2023-09-13 19:29:25 +02:00
.gitignore chore: update tests to account for .lake 2023-11-13 20:31:24 -05:00
.ignore chore: ignore stage0/ (for rg etc.) 2022-03-18 15:28:20 +01:00
CMakeLists.txt chore: update-stage0-commit cmake target (#3692) 2024-04-04 13:35:53 +00:00
CMakePresets.json chore: modernize build instructions (#4032) 2024-05-23 10:55:07 +00:00
CODEOWNERS chore: update code owners 2024-04-24 10:16:16 +02:00
CONTRIBUTING.md doc: Adjust contributor's docs to squash merging (#2927) 2023-11-21 10:13:43 +00:00
flake.lock chore: test results as job summary (#3715) 2024-03-27 10:14:33 +00:00
flake.nix chore: replace shell.nix with a devShell in flake.nix (#3717) 2024-03-21 13:24:01 +00:00
lean-toolchain doc: VS Code dev setup (#2961) 2023-11-30 08:35:03 +00:00
lean.code-workspace chore: add the lean4 extension to the vscode workspace (#3059) 2023-12-14 08:58:21 +00:00
LICENSE chore: remove LICENSE header that confused GitHub 2021-11-18 09:42:35 +01:00
LICENSES chore: add GMP license for now 2021-11-18 09:42:35 +01:00
README.md doc: mention build doc source location (#4045) 2024-05-01 22:42:54 +00:00
RELEASES.md chore: begin development cycle for v4.10.0 (#4374) 2024-06-06 12:06:13 +00:00

README.md

This is the repository for Lean 4.

About

Installation

See Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean (documentation source: doc/make/index.md).