bug#19100: 25.0.50; (NextStep) Crash in EmacsImage dealloc

[Ivan Andrus]

I had a few days of uptime and two frames open, both full screen.  I
made one not full screen by clicking on the little button in the upper
right of the (system) menu.  I then tried to resize the frame.  I'm not
sure if it had crashed before or after I tried resizing it, but the
backtrace is below.

I still have an lldb session attached if it's helpful.

It was built with a few (very minor) modifications (why the hash doesn’t 
match one from trunk) on top of:

commit a6a43d654a5f2a139c69f75f6d46383bf58b3a77
Author: Andreas Schwab <schwab@linux-m68k.org>
Date:   Fri Nov 14 21:44:03 2014 +0100

    Don't rerun configure if lisp/version.el changes
    ...

-Ivan


(lldb) bt all
* thread #1: tid = 0xddcf, 0x00007fff8bce6097 libobjc.A.dylib`objc_msgSend + 
23, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS 
(code=EXC_I386_GPFLT)
  * frame #0: 0x00007fff8bce6097 libobjc.A.dylib`objc_msgSend + 23
    frame #1: 0x00007fff902b53e1 AppKit`-[NSBitmapImageRep dealloc] + 36
    frame #2: 0x00007fff8cc7f43f CoreFoundation`CFRelease + 591
    frame #3: 0x00007fff8cc92699 CoreFoundation`-[__NSArrayM dealloc] + 185
    frame #4: 0x00007fff9014c3b3 AppKit`-[NSImage dealloc] + 61
    frame #5: 0x00000001001ce3de Emacs`-[EmacsImage 
dealloc](self=0x000000011c84ad80, _cmd=<unavailable>) + 94 at nsimage.m:204
    frame #6: 0x00000001001a9ab0 Emacs`x_clear_image [inlined] x_clear_image_1 
+ 14 at image.c:1278
    frame #7: 0x00000001001a9aa2 Emacs`x_clear_image(f=<unavailable>, 
img=0x000000011c865a80) + 18 at image.c:1330
    frame #8: 0x00000001001a8b91 Emacs`clear_image_cache [inlined] free_image + 
161 at image.c:1007
    frame #9: 0x00000001001a8af0 Emacs`clear_image_cache(f=0x0000000104de8528, 
filter=<unavailable>) + 768 at image.c:1526
    frame #10: 0x00000001001a87d2 Emacs`clear_image_caches(filter=4320145466) + 
82 at image.c:1564
    frame #11: 0x00000001000282d9 Emacs`redisplay_internal + 7241 at 
xdisp.c:14112
    frame #12: 0x00000001000c5b1e Emacs`read_char(commandflag=1, 
map=5238060374, prev_event=4320145466, used_mouse_menu=0x00007fff5fbff0bf, 
end_time=0x0000000000000000) + 2030 at keyboard.c:2596
    frame #13: 0x00000001000c30f8 
Emacs`read_key_sequence(bufsize=<unavailable>, keybuf=<unavailable>, 
prompt=<unavailable>, dont_downcase_last=<unavailable>, 
can_return_switch_frame=<unavailable>, fix_current_buffer=<unavailable>, 
prevent_redisplay=<unavailable>) + 1960 at keyboard.c:9218
    frame #14: 0x00000001000c2705 Emacs`command_loop_1 + 5301 at keyboard.c:1465
    frame #15: 0x000000010014152b 
Emacs`internal_condition_case(bfun=0x00000001000c1250, handlers=<unavailable>, 
hfun=<unavailable>) + 251 at eval.c:1344
    frame #16: 0x00000001000d334e Emacs`command_loop_2(ignore=<unavailable>) + 
62 at keyboard.c:1200
    frame #17: 0x0000000100140eb3 Emacs`internal_catch(tag=<unavailable>, 
func=0x00000001000d3310, arg=4320145466) + 243 at eval.c:1105
    frame #18: 0x00000001000c085e Emacs`command_loop + 174 at keyboard.c:1179
    frame #19: 0x00000001000c0753 Emacs`recursive_edit_1 + 131 at keyboard.c:789
    frame #20: 0x00000001000c09cc Emacs`Frecursive_edit + 236 at keyboard.c:860
    frame #21: 0x00000001000bf608 Emacs`main(argc=0, argv=<unavailable>) + 5944 
at emacs.c:1623
    frame #22: 0x00007fff8cc4a5fd libdyld.dylib`start + 1
    frame #23: 0x00007fff8cc4a5fd libdyld.dylib`start + 1

  thread #3: tid = 0xde26, 0x00007fff89d8f662 libsystem_kernel.dylib`kevent64 + 
10, queue = 'com.apple.libdispatch-manager'
    frame #0: 0x00007fff89d8f662 libsystem_kernel.dylib`kevent64 + 10
    frame #1: 0x00007fff8ac90421 libdispatch.dylib`_dispatch_mgr_invoke + 239
    frame #2: 0x00007fff8ac90136 libdispatch.dylib`_dispatch_mgr_thread + 52

  thread #6: tid = 0xde3d, 0x00007fff89d8e9aa libsystem_kernel.dylib`__select + 
10
    frame #0: 0x00007fff89d8e9aa libsystem_kernel.dylib`__select + 10
    frame #1: 0x00000001001b4e58 Emacs`-[EmacsApp 
fd_handler:](self=<unavailable>, _cmd=<unavailable>, unused=<unavailable>) + 
264 at nsterm.m:4921
    frame #2: 0x00007fff8e685dfb Foundation`__NSThread__main__ + 1318
    frame #3: 0x00007fff8bee4899 libsystem_pthread.dylib`_pthread_body + 138
    frame #4: 0x00007fff8bee472a libsystem_pthread.dylib`_pthread_start + 137
    frame #5: 0x00007fff8bee8fc9 libsystem_pthread.dylib`thread_start + 13

  thread #9: tid = 0xdeac, 0x00007fff89d8aa1a 
libsystem_kernel.dylib`mach_msg_trap + 10
    frame #0: 0x00007fff89d8aa1a libsystem_kernel.dylib`mach_msg_trap + 10
    frame #1: 0x00007fff89d89d18 libsystem_kernel.dylib`mach_msg + 64
    frame #2: 0x00007fff8ccd6f15 CoreFoundation`__CFRunLoopServiceMachPort + 181
    frame #3: 0x00007fff8ccd6539 CoreFoundation`__CFRunLoopRun + 1161
    frame #4: 0x00007fff8ccd5e75 CoreFoundation`CFRunLoopRunSpecific + 309
    frame #5: 0x00007fff9020205e AppKit`_NSEventThread + 144
    frame #6: 0x00007fff8bee4899 libsystem_pthread.dylib`_pthread_body + 138
    frame #7: 0x00007fff8bee472a libsystem_pthread.dylib`_pthread_start + 137
    frame #8: 0x00007fff8bee8fc9 libsystem_pthread.dylib`thread_start + 13

  thread #8395: tid = 0x24962b, 0x00007fff89d8e716 
libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'CVDisplayLink'
    frame #0: 0x00007fff89d8e716 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fff8bee6c3b libsystem_pthread.dylib`_pthread_cond_wait + 
727
    frame #2: 0x00007fff8eb90a38 CoreVideo`CVDisplayLink::runIOThread() + 656
    frame #3: 0x00007fff8eb9078f CoreVideo`startIOThread(void*) + 147
    frame #4: 0x00007fff8bee4899 libsystem_pthread.dylib`_pthread_body + 138
    frame #5: 0x00007fff8bee472a libsystem_pthread.dylib`_pthread_start + 137
    frame #6: 0x00007fff8bee8fc9 libsystem_pthread.dylib`thread_start + 13

  thread #8737: tid = 0x25d777, 0x00007fff89d8ee6a 
libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #0: 0x00007fff89d8ee6a libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff8bee5f08 libsystem_pthread.dylib`_pthread_wqthread + 330
    frame #2: 0x00007fff8bee8fb9 libsystem_pthread.dylib`start_wqthread + 13

  thread #8746: tid = 0x25d88c, 0x00007fff89d8ee6a 
libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #0: 0x00007fff89d8ee6a libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff8bee5f08 libsystem_pthread.dylib`_pthread_wqthread + 330
    frame #2: 0x00007fff8bee8fb9 libsystem_pthread.dylib`start_wqthread + 13


In GNU Emacs 25.0.50.9 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 
10.9.5 (Build 13F34))
of 2014-11-14 on iandrus-osx
Repository revision: c16eaa856ea99384d490979715a7c0a2a34ff984
Windowing system distributor `Apple', version 10.3.1265
Configured using:
`configure --with-ns'

Configured features:
IMAGEMAGICK ACL LIBXML2 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix