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Check that colour slot is non-empty before checking for gray-ness

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This is otherwise UB, and trips a GLIBCXX assertion (when enabled).
This commit is contained in:
ISSOtm
2022-10-11 21:39:32 +02:00
parent 0e0876b17f
commit 12ba057b4f
1 changed files with 1 additions and 1 deletions
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2
src/gfx/process.cpp
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@@ -142,7 +142,7 @@ public:
} }
uint8_t bins = 0; uint8_t bins = 0;
for (auto const &color : colors) { for (auto const &color : colors) {
if (color->isTransparent()) { if (!color.has_value() || color->isTransparent()) {
continue; continue;
} }
if (!color->isGray()) { if (!color->isGray()) {