gh-156951: Do not truncate the color pair in curses.slk_color() - #156952
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serhiy-storchaka merged 1 commit intoSep 7, 2026
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slk_color() cast its color pair to a short before calling ncurses, while the pair converter accepts pairs up to INT_MAX on a build with extended color support. Pairs of 32768 and above were rejected although the rest of the module accepts them, and a pair whose low 16 bits named a valid pair was silently applied in place of the one that was asked for. Call extended_slk_color() under the module's existing _NCURSES_EXTENDED_COLOR_FUNCS guard, as slk_attr_set() and window.color_set() already do, and keep the legacy call for builds without it.
clin1234
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Sep 12, 2026
…pythonGH-156952) slk_color() cast its color pair to a short, so pairs of 32768 and above were rejected or silently applied as a different pair. Use extended_slk_color() when it is available, like slk_attr_set() does.
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slk_color()cast its color pair to ashort, so pairs of 32768 and above were rejected and a pair whose low 16 bits named a valid pair was silently applied in its place. It now callsextended_slk_color()under the module's existing_NCURSES_EXTENDED_COLOR_FUNCSguard, asslk_attr_set()andwindow.color_set()already do.No
Misc/NEWS.dentry:slk_color()isversionadded:: nextand has not been in a release.curses.slk_color()truncates its color pair argument to a short #156951