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-rw-r--r--Source/JavaScriptCore/heap/SlotVisitorInlines.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/heap/SlotVisitorInlines.h b/Source/JavaScriptCore/heap/SlotVisitorInlines.h
index 4273a28d6..da338ce11 100644
--- a/Source/JavaScriptCore/heap/SlotVisitorInlines.h
+++ b/Source/JavaScriptCore/heap/SlotVisitorInlines.h
@@ -174,6 +174,7 @@ inline void SlotVisitor::donateAndDrain()
inline void SlotVisitor::copyLater(JSCell* owner, void* ptr, size_t bytes)
{
+ ASSERT(bytes);
CopiedBlock* block = CopiedSpace::blockFor(ptr);
if (block->isOversize()) {
m_shared.m_copiedSpace->pin(block);