[Bug 27340] WoW Launcher crashes, NULL pointer dereferenced

http://bugs.winehq.org/show_bug.cgi?id=27340

--- Comment #5 from [e-mail] 2011-06-01 17:38:06 CDT ---
(In reply to comment #4)
> That's not how QueryInterface is supposed to work...  I suspect the bug is
> elsewhere.

According to my fprintf statements, nsscript is not NULL immediately before:

if(nsparser)
        nsIParser_BeginEvaluatingParserInsertedScript(nsparser);

in mutation.c, and is NULL immediately afterwards.