bug#26615: Recent Emacs crashes when PC is suspended and using tabbar-ruler package

[Angelo Graziosi]

My Emacs builds [1] from master, I did in April, crash when PC is 
suspended and then waked up. This seems related to the use of 
tabbar-ruler package. This is the minimal init.el file with which I can 
reproduce the issue:

----------------------------------------------
$ cat .emacs.d/init.el

(when (>= emacs-major-version 24)
  (require 'package)
  (package-initialize))

(require 'tabbar-ruler)
----------------------------------------------

Commenting out the line "(require 'tabbar-ruler)", the crash does not 
occur. Also starting Emacs with "-Q" option does not give the crash.

It seems, I cannot reproduce the crash on other systems (GNU/Linux, macOS)

This crash occurs only with April builds (and on Windows). I cannot 
reproduce the crash (also with a full init.el file) with builds I did, 
for example, in March (<= 20170327, r128789.8ce827426e-1)

I wonder if someone could reproduce the crash.. Mayebe one need to try 
few times so see the crash. Usually it occurs regularly.

Below [2] there is what I got following the suggestions of the crash 
window. Please, notice that I have some reluctance (i.e., _repulsion_) 
to use debuggers..

Ciao, Angelo.

-----
[1] Builds on Win 10 15063.138, on MSYS2/MinGW64:

./autogen.sh
./configure --prefix=/c/LocalApps/Emacs
make -j3
...

[2] $ gdb -p 5424
GNU gdb (GDB) 7.12.1
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Attaching to process 5424
[New Thread 5424.0x1f44]
[New Thread 5424.0x1a58]
[New Thread 5424.0x1360]
[New Thread 5424.0xab0]
[New Thread 5424.0x1e4c]
Reading symbols from C:\LocalApps\Emacs\bin\emacs.exe...done.
(gdb) continue
Continuing.
[Thread 5424.0x1e4c exited with code 0]

Thread 1 received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 5424.0x1f44]
0x00007ff9e93ca963 in KERNELBASE!DebugBreak ()
   from C:\WINDOWS\System32\KernelBase.dll
(gdb) bt
#0  0x00007ff9e93ca963 in KERNELBASE!DebugBreak ()
   from C:\WINDOWS\System32\KernelBase.dll
#1  0x0000000400180078 in emacs_abort () at w32fns.c:10875
#2  0x00000004000acd89 in terminate_due_to_signal (sig=11,
    backtrace_limit=<optimized out>) at emacs.c:393
#3  0x00000004000c4b5e in handle_fatal_signal (sig=13708528, sig@entry=11)
    at sysdep.c:1714
#4  0x00000004000c593c in deliver_thread_signal (sig=11,
    handler=0x4000c4b50 <handle_fatal_signal>) at sysdep.c:1688
#5  0x00000004001d2468 in _gnu_exception_handler (exception_data=0xbfd580)
    at 
C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crt_handler.c:223
#6  0x00007ff9ec2f6476 in ntdll!__C_specific_handler ()
   from C:\WINDOWS\SYSTEM32\ntdll.dll
#7  0x00007ff9ec30a08d in ntdll!.chkstk () from 
C:\WINDOWS\SYSTEM32\ntdll.dll
#8  0x00007ff9ec279c58 in ntdll!RtlLookupFunctionEntry ()
   from C:\WINDOWS\SYSTEM32\ntdll.dll
#9  0x00007ff9ec30910e in ntdll!KiUserExceptionDispatcher ()
   from C:\WINDOWS\SYSTEM32\ntdll.dll
#10 0x000000040018f043 in w32_mouse_position (fp=0xbfe3b0, insist=-1,
    bar_window=0xbfe3b8, part=0xbfe3a8, x=<optimized out>, y=<optimized 
out>,
    time=<optimized out>) at w32term.c:3505
#11 0x000000040000acfc in Fmouse_pixel_position () at frame.c:2082
#12 0x000000040011dcd2 in Ffuncall (nargs=nargs@entry=1,
    args=args@entry=0xbfe468) at eval.c:2742
#13 0x0000000400153312 in exec_byte_code (bytestr=<optimized out>,
    vector=74897728, maxdepth=<optimized out>,
    args_template=args_template@entry=0, nargs=nargs@entry=0,
    args=<optimized out>, args@entry=0x0) at bytecode.c:641
#14 0x000000040011d86a in funcall_lambda (fun=17190255061,
    nargs=nargs@entry=0, arg_vector=arg_vector@entry=0xbfe8e0) at 
eval.c:3020
#15 0x000000040011dc4b in Ffuncall (nargs=nargs@entry=1,
    args=args@entry=0xbfe8d8) at eval.c:2756
#16 0x000000040011f74c in Fapply (nargs=2, args=0xbfe8d8) at eval.c:2326
#17 0x000000040011dcd2 in Ffuncall (nargs=nargs@entry=3,
    args=args@entry=0xbfe8d0) at eval.c:2742
#18 0x0000000400153312 in exec_byte_code (bytestr=<optimized out>, 
vector=-3,
    maxdepth=<optimized out>, args_template=args_template@entry=1030,
    nargs=nargs@entry=1, args=<optimized out>, args@entry=0xbfebf8)
    at bytecode.c:641
#19 0x000000040011d980 in funcall_lambda (fun=17183382013,
    nargs=nargs@entry=1, arg_vector=arg_vector@entry=0xbfebf8) at 
eval.c:2942
#20 0x000000040011dc4b in Ffuncall (nargs=nargs@entry=2,
    args=args@entry=0xbfebf0) at eval.c:2756
#21 0x000000040011dd8d in call1 (fn=fn@entry=59640, 
arg1=arg1@entry=74563637)
    at eval.c:2604
#22 0x00000004000b3945 in timer_check_2 (idle_timers=<optimized out>,
    timers=<optimized out>) at keyboard.c:4467
#23 timer_check () at keyboard.c:4529
#24 0x00000004000b3dfa in readable_events (flags=1) at keyboard.c:3345
#25 0x00000004000b46a5 in get_input_pending (flags=flags@entry=1)
    at keyboard.c:6799
#26 0x00000004000b6a70 in detect_input_pending_run_timers (
    do_display=do_display@entry=false) at keyboard.c:9926
#27 0x00000004000b7873 in read_char (commandflag=160, commandflag@entry=1,
    map=1, map@entry=75372707, prev_event=17207923560,
    used_mouse_menu=0x1f00000000, used_mouse_menu@entry=0xbff45b,
    end_time=end_time@entry=0x0) at keyboard.c:2734
#28 0x00000004000b9cb3 in read_key_sequence (keybuf=keybuf@entry=0xbff5b0,
    prompt=prompt@entry=0, 
dont_downcase_last=dont_downcase_last@entry=false,
    can_return_switch_frame=can_return_switch_frame@entry=true,
    fix_current_buffer=fix_current_buffer@entry=true,
    prevent_redisplay=prevent_redisplay@entry=false, bufsize=30)
    at keyboard.c:9122
#29 0x00000004000bb833 in command_loop_1 () at keyboard.c:1370
#30 0x000000040011c1fd in internal_condition_case (
    bfun=bfun@entry=0x4000bb5e0 <command_loop_1>,
    handlers=handlers@entry=23408, hfun=hfun@entry=0x4000b2c30 <cmd_error>)
    at eval.c:1324
#31 0x00000004000ad3e4 in command_loop_2 (ignore=<optimized out>)
    at keyboard.c:1112
#32 0x000000040011c18b in internal_catch (tag=tag@entry=60368,
    func=func@entry=0x4000ad3c0 <command_loop_2>, arg=arg@entry=0)
    at eval.c:1091
#33 0x00000004000ad397 in command_loop () at keyboard.c:1091
#34 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) q
A debugging session is active.

        Inferior 1 [process 5424] will be detached.

Quit anyway? (y or n) [answered Y; input not from terminal]
Detaching from program: C:\LocalApps\Emacs\bin\emacs.exe, Pid 5424