1 files changed, 28 insertions, 2 deletions
diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index 2b60a46a89..216f325f6b 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -1093,6 +1093,8 @@ void QScriptEnginePrivate::setContextFlags(JSC::ExecState *exec, uint flags)
 
 void QScriptEnginePrivate::mark(JSC::MarkStack& markStack)
 {
+    Q_Q(QScriptEngine);
+
     markStack.append(originalGlobalObject());
     markStack.append(globalObject());
     if (originalGlobalObjectProxy)
@@ -1130,6 +1132,22 @@ void QScriptEnginePrivate::mark(JSC::MarkStack& markStack)
                 markStack.append((*it)->prototype);
         }
     }
+
+    {
+        QScriptContext *context = q->currentContext();
+
+        while (context) {
+            JSC::ScopeChainNode *node = frameForContext(context)->scopeChain();
+            JSC::ScopeChainIterator it(node);
+            for (it = node->begin(); it != node->end(); ++it) {
+                JSC::JSObject *object = *it;
+                if (object)
+                    markStack.append(object);
+            }
+
+            context = context->parentContext();
+        }
+    }
 }
 
 bool QScriptEnginePrivate::isCollecting() const
@@ -2281,7 +2299,8 @@ QScriptContext *QScriptEngine::pushContext()
    return the new top frame. (might be the same as exec if a new stackframe was not needed) or 0 if stack overflow
 */
 JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSValue _thisObject,
-                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor)
+                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor,
+                                                  bool clearScopeChain)
 {
     JSC::JSValue thisObject = _thisObject;
     if (calledAsConstructor) {
@@ -2315,7 +2334,14 @@ JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSV
         for (it = args.begin(); it != args.end(); ++it)
             newCallFrame[++dst] = *it;
         newCallFrame += argc + JSC::RegisterFile::CallFrameHeaderSize;
-        newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+
+        if (!clearScopeChain) {
+            newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+        } else {
+            JSC::JSObject *jscObject = originalGlobalObject();
+            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), jscObject);
+            newCallFrame->init(0, /*vPC=*/0, scn, exec, flags | ShouldRestoreCallFrame, argc, callee);
+        }
     } else {
         setContextFlags(newCallFrame, flags);
 #if ENABLE(JIT)