[3.15] gh-139145: Fix tkinter event loop in interactive mode (GH-152257)#152291
Merged
serhiy-storchaka merged 1 commit intoJun 26, 2026
Merged
Conversation
…-152257) When a Tcl command running its own event loop (such as vwait or wait_variable) was active and the user typed input on stdin, the event loop kept spinning at 100% CPU. The stdin file handler is now removed as soon as input becomes available. Also fix pythongh-139816: an exception raised in a callback no longer stops the event loop to wait for Enter on a Python built without readline; pending callbacks keep running until input is actually available on stdin. (cherry picked from commit 3ffda34) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: mdehoon <mjldehoon@yahoo.com> Co-authored-by: Christopher Chavez <chrischavez@gmx.us> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This was referenced Jun 26, 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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
When a Tcl command running its own event loop (such as vwait or
wait_variable) was active and the user typed input on stdin, the event
loop kept spinning at 100% CPU. The stdin file handler is now removed as
soon as input becomes available.
Also fix gh-139816: an exception raised in a callback no longer stops the
event loop to wait for Enter on a Python built without readline; pending
callbacks keep running until input is actually available on stdin.
(cherry picked from commit 3ffda34)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com
Co-authored-by: mdehoon mjldehoon@yahoo.com
Co-authored-by: Christopher Chavez chrischavez@gmx.us
Co-authored-by: Claude Opus 4.8 noreply@anthropic.com