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Title: gh-152260: Fix flaky curses test_scr_dump on macOS by serhiy-storchaka · Pull Request #152390 · python/cpython · GitHub

Open Graph Title: gh-152260: Fix flaky curses test_scr_dump on macOS by serhiy-storchaka · Pull Request #152390 · python/cpython

X Title: gh-152260: Fix flaky curses test_scr_dump on macOS by serhiy-storchaka · Pull Request #152390 · python/cpython

Description: Issue: gh-152260 The screen dump embeds raw pointers that change after scr_restore() reallocates the virtual-screen structures, so comparing dump bytes is unreliable on platforms such as macOS. The previous attempt (gh-152260, PR #152340) tried to detect this by comparing two consecutive dumps of the unchanged screen and only byte-comparing when they matched. That probe is a false predictor: two back-to-back dumps share the same live-allocation pointers, but the asserted comparison is against a dump taken after scr_restore(), whose pointers differ. So test_scr_dump stayed flaky-red on macos-26-intel. Drop the byte comparison entirely and exercise the scr_dump/scr_restore/scr_init/scr_set round-trip functionally.

Open Graph Description: Issue: gh-152260 The screen dump embeds raw pointers that change after scr_restore() reallocates the virtual-screen structures, so comparing dump bytes is unreliable on platforms such as macOS. T...

X Description: Issue: gh-152260 The screen dump embeds raw pointers that change after scr_restore() reallocates the virtual-screen structures, so comparing dump bytes is unreliable on platforms such as macOS. T...

Opengraph URL: https://github.com/python/cpython/pull/152390

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dae4eb5 gh-152260: Fix flaky curses test_scr_dump on macOS serhiy-storchaka Jun 27, 2026 https://github.com/python/cpython/pull/152390/commits/dae4eb5013a73f475ccf826f033f437dc6bfc5dc
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