Fix deadlock in test with free threading #5973
Open
+10
−4
Conversation
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
Importing "widget_module" re-enables the GIL. In current versions of CPython, this requires pausing all threads attached to all interpreters. The spinning on sync/num without a py::gil_scoped_release causes occasional deadlocks.
Collaborator
|
Windows jobs have been failing to start across multiple repos today on GHA. Don't think it's related. |
henryiii
approved these changes
Jan 27, 2026
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Outdated suggestions cannot be applied.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.
Description
Importing "widget_module" re-enables the GIL. In current versions of CPython, this requires pausing all threads attached to all interpreters. The spinning on sync/num without a py::gil_scoped_release causes occasional deadlocks.