Completely detach failed script loader before dispatching error event.

third_party/WebKit/Source/core/dom/ScriptLoader.cpp

Index: third_party/WebKit/Source/core/dom/ScriptLoader.cpp
diff --git a/third_party/WebKit/Source/core/dom/ScriptLoader.cpp b/third_party/WebKit/Source/core/dom/ScriptLoader.cpp
index 2b19ef87843d7094d9609e67a09d1dd809adbd41..d3926f00265e7d82017301a55fc050a935a556ea 100644
--- a/third_party/WebKit/Source/core/dom/ScriptLoader.cpp
+++ b/third_party/WebKit/Source/core/dom/ScriptLoader.cpp
@@ -464,8 +464,7 @@ void ScriptLoader::notifyFinished(Resource* resource)
 {
     DCHECK(!m_willBeParserExecuted);
 
-    Document* elementDocument = &(m_element->document());
-    Document* contextDocument = elementDocument->contextDocument();
+    Document* contextDocument = m_element->document().contextDocument();
     if (!contextDocument)
         return;
 
@@ -474,8 +473,8 @@ void ScriptLoader::notifyFinished(Resource* resource)
     ScriptRunner::ExecutionType runOrder = m_willExecuteInOrder ? ScriptRunner::IN_ORDER_EXECUTION : ScriptRunner::ASYNC_EXECUTION;
     if (m_resource->errorOccurred()) {
         contextDocument->scriptRunner()->notifyScriptLoadError(this, runOrder);
-        dispatchErrorEvent();
         detach();
+        dispatchErrorEvent();
         return;
     }
     contextDocument->scriptRunner()->notifyScriptReady(this, runOrder);