From: timeless@mozdev.org

Bug 270042 Crash on startup [@ nsXULDocument::OnStreamComplete(nsIStreamLoader*, nsISupports*, unsigned int, unsigned int, unsigned char const*)]
r=neil


diff --git a/content/xul/document/src/nsXULDocument.cpp b/content/xul/document/src/nsXULDocument.cpp
--- a/content/xul/document/src/nsXULDocument.cpp
+++ b/content/xul/document/src/nsXULDocument.cpp
@@ -3506,6 +3506,33 @@ nsXULDocument::OnStreamComplete(nsIStrea
 
     NS_ASSERTION(mCurrentScriptProto && mCurrentScriptProto->mSrcLoading,
                  "script source not loading on unichar stream complete?");
+    if (!mCurrentScriptProto) {
+        nsCAutoString spec;
+        nsCOMPtr<nsIURI> uri;
+        if (channel) {
+            channel->GetURI(getter_AddRefs(uri));
+            if (uri)
+                uri->GetSpec(spec);
+        }
+        NS_ConvertUTF8toUTF16 utfSpec(spec);
+        const PRUnichar* params[] = { utfSpec.get() };
+        nsCOMPtr<nsIURI> overlayURI;
+        if (mCurrentPrototype)
+            overlayURI = mCurrentPrototype->GetURI();
+
+        nsContentUtils::ReportToConsole(
+                            nsContentUtils::eXUL_PROPERTIES,
+                            "MissingOverlay",
+                            params, NS_ARRAY_LENGTH(params),
+                            overlayURI,
+                            EmptyString(), /* source line */
+                            0, /* line number */
+                            0, /* column number */
+                            nsIScriptError::warningFlag,
+                            "XUL Document");
+
+        return NS_OK;
+    }
 
     // Clear mCurrentScriptProto now, but save it first for use below in
     // the compile/execute code, and in the while loop that resumes walks