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[3.15] gh-153480: Stop IDLE crashing when a file open in the editor is deleted (GH-153481) - #158264
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… deleted (pythonGH-153481) EditorWindow.focus_in_event calls last_mtime on every <FocusIn> event, which passed the open file path to os.path.getmtime with no guard. When another program deleted or renamed the file, refocusing the IDLE window let a FileNotFoundError escape the Tk event handler. last_mtime now returns the last known mtime when the path is inaccessible, so refocusing no longer raises and does not prompt to reload a file that is gone. See PR discussion for more. --------- (cherry picked from commit 6af40a6) Co-authored-by: tonghuaroot (童话) <tonghuaroot@gmail.com> Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
ashm-dev
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Oct 4, 2026
terryjreedy
enabled auto-merge (squash)
October 9, 2026 21:31
terryjreedy
approved these changes
Oct 9, 2026
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EditorWindow.focus_in_event calls last_mtime on every event,
which passed the open file path to os.path.getmtime with no guard. When
another program deleted or renamed the file, refocusing the IDLE window
let a FileNotFoundError escape the Tk event handler. last_mtime now
returns the last known mtime when the path is inaccessible, so refocusing
no longer raises and does not prompt to reload a file that is gone.
See PR discussion for more.
(cherry picked from commit 6af40a6)
Co-authored-by: tonghuaroot (童话) tonghuaroot@gmail.com
Co-authored-by: Serhiy Storchaka storchaka@gmail.com