Back out bug 459443 for now, until the patch in bug 474389 gets reviewed

docshell/base/nsDocShell.cpp

@@ -5534,7 +5534,8 @@ nsDocShell::DetachEditorFromWindow(nsISHEntry *aSHEntry)
 void
 nsDocShell::DetachEditorFromWindow()
 {
-    DetachEditorFromWindow(mOSHE);
+    if (mOSHE)
+        DetachEditorFromWindow(mOSHE);
 }
 
 nsresult

layout/reftests/bugs/reftest.list

@@ -1006,7 +1006,7 @@ fails-if(MOZ_WIDGET_TOOLKIT=="cocoa") == 456147.xul 456147-ref.html # bug 458047
 == 458487-4c.html 458487-4-ref.html
 == 458487-5a.html 458487-5-ref.html
 == 458487-5b.html 458487-5-ref.html
-== 459443-1.html 459443-1-ref.html
+fails == 459443-1.html 459443-1-ref.html
 == 459613-1.html 459613-1-ref.html
 == 460012-1.html 460012-1-ref.html
 == 461266-1.html 461266-1-ref.html