http://bugs.winehq.org/show_bug.cgi?id=20257
--- Comment #8 from Jeff Zaroyko jeffz@jeffz.name 2009-10-04 17:14:15 --- (In reply to comment #7)
(From update of attachment 23919 [details]) Minidump that Left 4 Dead created on crash.
Created while using wine 1.1.30.
I don't know if gdb can analyze this. I think Visual Studio will.
You should be able to glean the call stack from the analysis of this.
Still need the results of your regression test as it will identify the commit that has created this bug. The minidump doesn't appear to have the full debug symbols.