[Bug gdb/22024] New: Internal error

["rcopley at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22024

            Bug ID: 22024
           Summary: Internal error
           Product: gdb
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: rcopley at gmail dot com
  Target Milestone: ---

A GDB internal error happened while I was investigating Emacs bug 28268 (see
"https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28268";).

My emacs image is compiled with "-O0 -g -ggdb". Note Emacs has its own
".gdbinit", see "http://git.savannah.gnu.org/cgit/emacs.git/tree/src/.gdbinit";.

I ran Emacs under GDB in a Windows 7 command prompt, triggered the Emacs crash
in #28268 (visit git repo, open Git GUI via Magit by typing "C-x g ! g", close
Git GUI, type "C-g", Emacs crashes), then entered "thread apply all bt full".

The output:

Thread 1 received signal SIGTRAP, Trace/breakpoint trap.
0x000007fefcb831f3 in KERNELBASE!DebugBreak () from
C:\Windows\system32\KernelBase.dll
(gdb) thread apply all bt full

Thread 126 (Thread 3644.0x2bcc):
#0  0x0000000076e7bd7a in ntdll!ZwWaitForSingleObject () from
C:\Windows\SYSTEM32\ntdll.dll
No symbol table info available.
#1  0x000007fefcb510ac in WaitForSingleObjectEx () from
C:\Windows\system32\KernelBase.dll
No symbol table info available.
#2  0x000000040027c83b in reader_thread (arg=0x401bca480 <child_procs>) at
w32proc.c:1140
        cp = 0x401bca480 <child_procs>
#3  0x0000000076d259cd in KERNEL32!BaseThreadInitThunk () from
C:\Windows\system32\kernel32.dll
No symbol table info available.
#4  0x0000000076e5a561 in ntdll!RtlUserThreadStart () from
C:\Windows\SYSTEM32\ntdll.dll
No symbol table info available.
#5  0x0000000000000000 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
[Thread 3644.0x1a90 exited with code 2]
[Thread 3644.0x2bcc exited with code 2]
[Thread 3644.0x25d0 exited with code 2]
[Thread 3644.0x5e4 exited with code 2]
[Inferior 1 (process 3644) exited with code 02]
../../gdb-8.0/gdb/infcall.c:1154: internal-error: value*
call_function_by_hand_dummy(value*, int, valu
e**, void (*)(void*, int), void*): Assertion `tp->thread_fsm ==
&sm->thread_fsm' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) [answered Y; input not from terminal]

This is a bug, please report it.  For instructions, see:
<http://www.gnu.org/software/gdb/bugs/>.

../../gdb-8.0/gdb/infcall.c:1154: internal-error: value*
call_function_by_hand_dummy(value*, int, valu
e**, void (*)(void*, int), void*): Assertion `tp->thread_fsm ==
&sm->thread_fsm' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) [answered Y; input not from terminal]

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

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