Merge 94078 - Web Inspector: Inspected page sometimes crashes in InspectorResourceAgent::didFailL...

Source/WebCore/inspector/InspectorResourceAgent.cpp

Index: Source/WebCore/inspector/InspectorResourceAgent.cpp
===================================================================
--- Source/WebCore/inspector/InspectorResourceAgent.cpp	(revision 94213)
+++ Source/WebCore/inspector/InspectorResourceAgent.cpp	(working copy)
@@ -300,9 +300,13 @@
 void InspectorResourceAgent::didFailLoading(unsigned long identifier, DocumentLoader* loader, const ResourceError& error)
 {
     String resourceId = IdentifiersFactory::resourceId(identifier);
-    if (m_resourcesData->resourceType(resourceId) == InspectorPageAgent::DocumentResource)
-        m_resourcesData->addResourceSharedBuffer(resourceId, loader->frameLoader()->documentLoader()->mainResourceData(), loader->frame()->document()->inputEncoding());
 
+    if (m_resourcesData->resourceType(resourceId) == InspectorPageAgent::DocumentResource) {
+        Frame* frame = loader ? loader->frame() : 0;
+        if (frame && frame->loader()->documentLoader() && frame->document())
+            m_resourcesData->addResourceSharedBuffer(resourceId, frame->loader()->documentLoader()->mainResourceData(), frame->document()->inputEncoding());
+    }
+
     m_frontend->loadingFailed(resourceId, currentTime(), error.localizedDescription(), error.isCancellation());
 }