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-rw-r--r--layout/style/nsStyleStruct.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/layout/style/nsStyleStruct.cpp b/layout/style/nsStyleStruct.cpp
index 2f12d6201..eab11b80c 100644
--- a/layout/style/nsStyleStruct.cpp
+++ b/layout/style/nsStyleStruct.cpp
@@ -1634,9 +1634,14 @@ nsStylePosition::CalcDifference(const nsStylePosition& aNewData,
// also have percentage bsizes. This is handled via
// nsChangeHint_UpdateComputedBSize which clears intrinsic sizes
// for frames that have such replaced elements.
+ //
+ // We need to use nsChangeHint_ClearAncestorIntrinsics for
+ // block-size changes so we clear results of cached CSS Flex
+ // measuring reflows.
hint |= nsChangeHint_NeedReflow |
nsChangeHint_UpdateComputedBSize |
- nsChangeHint_ReflowChangesSizeOrPosition;
+ nsChangeHint_ReflowChangesSizeOrPosition |
+ nsChangeHint_ClearAncestorIntrinsics;
}
if (isVertical ? heightChanged : widthChanged) {