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bug#14970: crash deleting frames

From: Juanma Barranquero
Subject: bug#14970: crash deleting frames
Date: Sun, 28 Jul 2013 02:22:51 +0200

Package: emacs
Version: 24.3.50

Context: I'm trying new desktop code to force frames onscreen. To test
it, I have a function that creates a fair number of frames (around
15/20) either partially or totally offscreen.

Once the new desktop code moves them onscreen, I usually close them
all via another interactive test function. But if I try instead to
close them by clicking on each window's Close button, sooner or later
(after closing 10/15 frames, usually) Emacs crashes.

In previous crashes it didn't generate a backtrace, nor did Windows
offer to attach a debugger to the crashed program. Also, running under
gdb I couldn't reproduce the bug. This is the first time I've been
offered to attach gdb.

Whatever the reason, something fishy is happening with delete-frame,

#0  0x76c7321a in KERNELBASE!DeleteAce () from
#1  0x011ea460 in emacs_abort () at w32fns.c:8030
#2  0x010db418 in terminate_due_to_signal (sig=22,
backtrace_limit=2147483647) at emacs.c:369
#3  0x0115059d in die (msg=0x148470a "WINDOWP (a)", file=0x1484694
"lisp.h", line=798) at alloc.c:6558
#4  0x0114682c in XWINDOW (a=54749210) at lisp.h:798
#5  0x010129af in delete_frame (frame=93052933, force=54749234) at frame.c:1161
#6  0x01013496 in Fdelete_frame (frame=93052933, force=54749234) at frame.c:1451
#7  0x0116dadc in Ffuncall (nargs=3, args=0x88efe4) at eval.c:2819
#8  0x011ae49d in exec_byte_code (bytestr=19842041, vector=19842061,
maxdepth=16, args_template=54749210, nargs=0, args=0x0) at
#9  0x0116e65c in funcall_lambda (fun=19842013, nargs=1,
arg_vector=0x12ec40d) at eval.c:3050
#10 0x0116dcf2 in Ffuncall (nargs=2, args=0x88f320) at eval.c:2865
#11 0x01167794 in Fcall_interactively (function=54934394,
record_flag=54749210, keys=90185989) at callint.c:839
#12 0x0116db0b in Ffuncall (nargs=4, args=0x88f54c) at eval.c:2823
#13 0x011ae49d in exec_byte_code (bytestr=19717001, vector=19717021,
maxdepth=52, args_template=4100, nargs=4, args=0x88f860) at
#14 0x0116e298 in funcall_lambda (fun=19716981, nargs=4,
arg_vector=0x88f850) at eval.c:2984
#15 0x0116dcf2 in Ffuncall (nargs=5, args=0x88f84c) at eval.c:2865
#16 0x0116d661 in call4 (fn=54795106, arg1=54934394, arg2=54749210,
arg3=90185989, arg4=54749234) at eval.c:2664
#17 0x010e256f in read_char (commandflag=1, map=91059750,
prev_event=54749210, used_mouse_menu=0x88fac3, end_time=0x0) at
#18 0x010ee02f in read_key_sequence (keybuf=0x88fbe0, bufsize=30,
prompt=54749210, dont_downcase_last=false,
    fix_current_buffer=true) at keyboard.c:9056
#19 0x010df234 in command_loop_1 () at keyboard.c:1434
#20 0x0116a91f in internal_condition_case (bfun=0x10deebd
<command_loop_1>, handlers=54803674, hfun=0x10de744 <cmd_error>) at
#21 0x010deb72 in command_loop_2 (ignore=54749210) at keyboard.c:1161
#22 0x0116a239 in internal_catch (tag=54793554, func=0x10deb4e
<command_loop_2>, arg=54749210) at eval.c:1076
#23 0x010deb2a in command_loop () at keyboard.c:1140
#24 0x010de2e1 in recursive_edit_1 () at keyboard.c:779
#25 0x010de49d in Frecursive_edit () at keyboard.c:843
#26 0x010dc76b in main (argc=5, argv=0xc22d98) at emacs.c:1566

Lisp Backtrace:
"delete-frame" (0x88efe8)
"handle-delete-frame" (0x88f324)
"call-interactively" (0x88f550)
"command-execute" (0x88f850)

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