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-rw-r--r--Source/WebCore/css/DocumentRuleSets.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/Source/WebCore/css/DocumentRuleSets.cpp b/Source/WebCore/css/DocumentRuleSets.cpp
index 9cc08deb7..93f28b94d 100644
--- a/Source/WebCore/css/DocumentRuleSets.cpp
+++ b/Source/WebCore/css/DocumentRuleSets.cpp
@@ -114,6 +114,9 @@ void DocumentRuleSets::collectFeatures() const
m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
+
+ m_ancestorClassRuleSets.clear();
+ m_ancestorAttributeRuleSetsForHTML.clear();
}
RuleSet* DocumentRuleSets::ancestorClassRules(AtomicStringImpl* className) const