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-rw-r--r--Source/JavaScriptCore/runtime/Completion.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/Completion.cpp b/Source/JavaScriptCore/runtime/Completion.cpp
index ce620245b..311d660a0 100644
--- a/Source/JavaScriptCore/runtime/Completion.cpp
+++ b/Source/JavaScriptCore/runtime/Completion.cpp
@@ -55,6 +55,8 @@ JSValue evaluate(ExecState* exec, ScopeChainNode* scopeChain, const SourceCode&
{
JSLock lock(exec);
ASSERT(exec->globalData().identifierTable == wtfThreadData().currentIdentifierTable());
+ if (exec->globalData().isCollectorBusy())
+ CRASH();
CodeProfiling profile(source);