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-rw-r--r--xpcom/base/nsCycleCollector.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/xpcom/base/nsCycleCollector.cpp b/xpcom/base/nsCycleCollector.cpp
index 06ed42326..5dffa7409 100644
--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -2832,6 +2832,11 @@ nsCycleCollector::ForgetSkippable(bool aRemoveChildlessNodes,
{
CheckThreadSafety();
+ // Avoid this when we're aleady dealing with snow-white objects.
+ if (mFreeingSnowWhite) {
+ return;
+ }
+
mozilla::Maybe<mozilla::AutoGlobalTimelineMarker> marker;
if (NS_IsMainThread()) {
marker.emplace("nsCycleCollector::ForgetSkippable", MarkerStackRequest::NO_STACK);