sberg added a comment. Just a heads up that I ran into an arguably somewhat unexpected instance of this with (a copy of the Graphite project included in) LibreOffice, see the commit message of https://cgit.freedesktop.org/libreoffice/core/commit/?id=681b4a49d797996229513d3e842d2a431030730a "external/graphite: Avoid -fsanitize=pointer-overflow" for details. (In short, "ptrdiff_t d = ...; T * p += d / sizeof(T);" can trigger an overflow warning when d is negative.)
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