[Bug 49020] New: Seg fault in wineserver in req_get_thread_context

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49020

Bug ID: 49020
           Summary: Seg fault in wineserver in req_get_thread_context
           Product: Wine
           Version: 5.7
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
   Regression SHA1: c4dab9b76eb7397f6e5325ff4bdf792cf500e571
      Distribution: ---

Seg fault of wineserver at server/thread.c:1851

Program terminated with signal SIGSEGV, Segmentation fault.
#0  req_get_thread_context (req=<optimized out>, reply=<optimized out>) at
thread.c:1928
1928                    context->cpu = thread_context->regs.cpu;
(gdb) bt
#0  req_get_thread_context (req=<optimized out>, reply=<optimized out>) at
thread.c:1928
#1  0x5668ad25 in call_req_handler (thread=<optimized out>) at request.c:312
#2  0x566925c1 in thread_poll_event (fd=0x58748ca0, event=1) at thread.c:387
#3  0x56667186 in main_loop_epoll () at fd.c:490
#4  0x56667444 in main_loop () at fd.c:951
#5  0x56655ac5 in main ()

This is from wine-staging, line number is different. Code at this point is the
same.

thread_context is always NULL at this point.

Commit that introduced this bug is c4dab9b76eb7397f6e5325ff4bdf792cf500e571.