gh-90304: Fix IDLE startup failure with a broken font - #152419
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A font reporting a zero width for '0' made set_width() raise ZeroDivisionError. It now falls back to the configured width. Co-Authored-By: Claude Opus 4.8 <[email protected]>
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Thanks @serhiy-storchaka for the PR, and @terryjreedy for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15. |
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GH-157395 is a backport of this pull request to the 3.15 branch. |
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GH-157396 is a backport of this pull request to the 3.14 branch. |
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GH-157397 is a backport of this pull request to the 3.13 branch. |
terryjreedy
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Sep 13, 2026
…) (#157396) gh-90304: Fix IDLE startup failure with a broken font (GH-152419) On some systems a font reports a zero width for the '0' character (seen with a broken font on openSUSE). EditorWindow.set_width() divides the Text widget's pixel width by that value, so the ZeroDivisionError prevented IDLE from starting at all. set_width() now falls back to the configured width when the measured width is zero. self.width is consumed by the === RESTART === separator in the shell and by the squeezer's line wrapping. (cherry picked from commit 8a2db99) Co-authored-by: Serhiy Storchaka <[email protected]> Co-authored-by: Claude Opus 4.8 <[email protected]>
terryjreedy
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Sep 13, 2026
…) (#157397) gh-90304: Fix IDLE startup failure with a broken font (GH-152419) On some systems a font reports a zero width for the '0' character (seen with a broken font on openSUSE). EditorWindow.set_width() divides the Text widget's pixel width by that value, so the ZeroDivisionError prevented IDLE from starting at all. set_width() now falls back to the configured width when the measured width is zero. self.width is consumed by the === RESTART === separator in the shell and by the squeezer's line wrapping. (cherry picked from commit 8a2db99) Co-authored-by: Serhiy Storchaka <[email protected]> Co-authored-by: Claude Opus 4.8 <[email protected]>
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On some systems a font reports a zero width for the
'0'character (seen with a broken font on openSUSE).EditorWindow.set_width()divides the Text widget's pixel width by that value, so theZeroDivisionErrorprevented IDLE from starting at all.set_width()now falls back to the configured width when the measured width is zero.self.widthis consumed by the=== RESTART ===separator in the shell and by the squeezer's line wrapping.