Bug 458637. Make sure to properly flag the XSLT result document as not being ready for layout until we StartLayout. r+sr=sicking

content/xml/document/src/nsXMLContentSink.cpp

@@ -412,6 +412,7 @@ nsXMLContentSink::OnTransformDone(nsresult aResult,
   if (NS_FAILED(aResult) && contentViewer) {
     // Transform failed.
     if (domDoc) {
+      aResultDocument->SetMayStartLayout(PR_FALSE);
       // We have an error document.
       contentViewer->SetDOMDocument(domDoc);
     }

layout/base/nsPresShell.cpp

@@ -2369,6 +2369,8 @@ PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
     return NS_OK;
   }
 
+  NS_ASSERTION(!mDidInitialReflow, "Why are we being called?");
+
   nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
   mDidInitialReflow = PR_TRUE;