{{ message }}
[mypyc] Fix compiler crash for empty async with body - #21984
Merged
Merged
Conversation
Fix a regression introduced by #21982. CFG cleanup correctly removes an unreachable exception-handler block, but generated resume cleanup paths still reference its raw CPy_CatchError CallC result. This leaves malformed IR and causes a KeyError during reference count insertion. Keep the saved exception state in a register so it remains available across the generated control flow. Add regression coverage for compiling and running an async with statement with an empty body.
p-sawicki
approved these changes
Sep 14, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Fix a regression introduced by #21982. CFG cleanup correctly removes an unreachable exception-handler block, but generated resume cleanup paths still reference its raw CPy_CatchError CallC result. This leaves malformed IR and causes a KeyError during reference count insertion.
Keep the saved exception state in a register so it remains available across the generated control flow. Add regression coverage for compiling and running an async with statement with an empty body.
I used coding agent assist.