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authorFabian Kosmale <fabian.kosmale@qt.io>2020-11-24 20:49:32 +0100
committerQt Cherry-pick Bot <cherrypick_bot@qt-project.org>2020-12-03 21:58:06 +0000
commit0b4adb5b63221d423e4bdd6d07b3460d3d5cc6fe (patch)
treee91685cc07a51ddb5972cf253faf524e1f88511e /examples/widgets/widgets/styles/norwegianwoodstyle.cpp
parente6e23d061cb8ac81007119603f8e7c64fc572e04 (diff)
Avoid signed overflow in moc5.15
moc's preprocessor needs to implement certain math operation to correctly handle #if conditions. Unfortunately, its implementation is not overflow safe. However, those are rare enough in practice that we in general do not need to care about them. This patch adds a workaround for one case where UBSAN run into an overflow related issue. A complete fix would require to make moc spec compliant (do math with std::max_(u)int_t operands; always wrap on overflow) in all operations. Fixes: QTBUG-88825 Change-Id: Ic4d2cb097db2fa2f9d4681bbaab3068eaa2745aa Reviewed-by: Lars Knoll <lars.knoll@qt.io> (cherry picked from commit df8fbcf382b086e96082a8eb3622c60273e94c4d) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
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