[Bug 39065] thread.c, line 403: Crash when attaching debugger (EXC_BAD_ACCESS, EXC_i386_GPFLT)

https://bugs.winehq.org/show_bug.cgi?id=39065

--- Comment #7 from Sebastian Lackner  ---
Could you check if a log with WINEDEBUG=+seh shows anything useful?

Based on the location where it crashes it sounds like %gs got corrupted
somehow. This might be the applications fault, however Wine theoretically has a
way to workaround that:
http://source.winehq.org/git/wine.git/blob/HEAD:/dlls/ntdll/signal_i386.c#l1...
Is this particular code called, and does the following TRACE appear in the log
somewhere?

--- snip ---
TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
--- snip ---