bug#18848: hang is in [EmacsApp run] (24.4.51; Hang after toolbar use)

[David Reitter]

This occurs in OS X 10.10 “Yosemite”, but not earlier.

events on the NS side are received and put into the emacs event queue.  

Attaching full call stack below for reference.

  * frame #0: 0x00007fff909a952e libsystem_kernel.dylib`mach_msg_trap + 10
    frame #1: 0x00007fff909a869f libsystem_kernel.dylib`mach_msg + 55
    frame #2: 0x00007fff8598db14 CoreFoundation`__CFRunLoopServiceMachPort + 212
    frame #3: 0x00007fff8598cfdb CoreFoundation`__CFRunLoopRun + 1371
    frame #4: 0x00007fff8598c838 CoreFoundation`CFRunLoopRunSpecific + 296
    frame #5: 0x00007fff919f943f HIToolbox`RunCurrentEventLoopInMode + 235
    frame #6: 0x00007fff919f91ba HIToolbox`ReceiveNextEventCommon + 431
    frame #7: 0x00007fff919f8ffb 
HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 71
    frame #8: 0x00007fff89ca8821 AppKit`_DPSNextEvent + 964
    frame #9: 0x00007fff89ca7fd0 AppKit`-[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
    frame #10: 0x00000001002b2e8b Emacs`-[EmacsApp 
run](self=0x0000000101420b20, _cmd=0x00007fff8a607034) + 379 at nsterm.m:4497
    frame #11: 0x00000001002c4ce7 
Emacs`ns_read_socket(terminal=0x0000000102823678, hold_quit=0x00007fff5fbfbfa0) 
+ 855 at nsterm.m:3641
    frame #12: 0x0000000100145c6d Emacs`gobble_input + 173 at keyboard.c:6850
    frame #13: 0x000000010014be85 Emacs`get_input_pending(flags=3) + 117 at 
keyboard.c:6771
    frame #14: 0x0000000100150c5d 
Emacs`Finput_pending_p(check_timers=4345311338) + 173 at keyboard.c:9940
    frame #15: 0x0000000100201d44 Emacs`Ffuncall(nargs=2, 
args=0x00007fff5fbfc130) + 1044 at eval.c:2812
    frame #16: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4298564145, 
vector=4298564181, maxdepth=28, args_template=3076, nargs=1, 
args=0x00007fff5fbfc838) + 3504 at bytecode.c:916
    frame #17: 0x0000000100202e84 Emacs`funcall_lambda(fun=4298564101, nargs=1, 
arg_vector=0x00007fff5fbfc830) + 500 at eval.c:2979
    frame #18: 0x0000000100201f6c Emacs`Ffuncall(nargs=2, 
args=0x00007fff5fbfc828) + 1596 at eval.c:2861
    frame #19: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4299852505, 
vector=4299852541, maxdepth=16, args_template=4345311290, nargs=0, 
args=0x0000000000000000) + 3504 at bytecode.c:916
    frame #20: 0x0000000100203261 Emacs`funcall_lambda(fun=4299852461, nargs=0, 
arg_vector=0x00007fff5fbfcf30) + 1489 at eval.c:3045
    frame #21: 0x0000000100201f6c Emacs`Ffuncall(nargs=1, 
args=0x00007fff5fbfcf28) + 1596 at eval.c:2861
    frame #22: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4299813801, 
vector=4299813837, maxdepth=20, args_template=4345311290, nargs=0, 
args=0x0000000000000000) + 3504 at bytecode.c:916
    frame #23: 0x0000000100203261 Emacs`funcall_lambda(fun=4299813757, nargs=0, 
arg_vector=0x00007fff5fbfd630) + 1489 at eval.c:3045
    frame #24: 0x0000000100201f6c Emacs`Ffuncall(nargs=1, 
args=0x00007fff5fbfd628) + 1596 at eval.c:2861
    frame #25: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4299812881, 
vector=4299812917, maxdepth=16, args_template=4345311290, nargs=0, 
args=0x0000000000000000) + 3504 at bytecode.c:916
    frame #26: 0x0000000100203261 Emacs`funcall_lambda(fun=4299812741, nargs=4, 
arg_vector=0x00007fff5fbfdd30) + 1489 at eval.c:3045
    frame #27: 0x0000000100201f6c Emacs`Ffuncall(nargs=5, 
args=0x00007fff5fbfdd28) + 1596 at eval.c:2861
    frame #28: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4299811305, 
vector=4299811341, maxdepth=20, args_template=4345311290, nargs=0, 
args=0x0000000000000000) + 3504 at bytecode.c:916
    frame #29: 0x0000000100203261 Emacs`funcall_lambda(fun=4299811205, nargs=2, 
arg_vector=0x00007fff5fbfe458) + 1489 at eval.c:3045
    frame #30: 0x0000000100201f6c Emacs`Ffuncall(nargs=3, 
args=0x00007fff5fbfe450) + 1596 at eval.c:2861
    frame #31: 0x00000001001faa43 
Emacs`Fcall_interactively(function=4370705002, record_flag=4345311290, 
keys=4370471557) + 9155 at callint.c:836
    frame #32: 0x0000000100201d9a Emacs`Ffuncall(nargs=4, 
args=0x00007fff5fbfe8d8) + 1130 at eval.c:2819
    frame #33: 0x000000010025be60 Emacs`exec_byte_code(bytestr=4299358761, 
vector=4299358797, maxdepth=52, args_template=4100, nargs=1, 
args=0x00007fff5fbff030) + 3504 at bytecode.c:916
    frame #34: 0x0000000100202e84 Emacs`funcall_lambda(fun=4299358717, nargs=1, 
arg_vector=0x00007fff5fbff028) + 500 at eval.c:2979
    frame #35: 0x0000000100201f6c Emacs`Ffuncall(nargs=2, 
args=0x00007fff5fbff020) + 1596 at eval.c:2861
    frame #36: 0x0000000100202839 Emacs`call1(fn=4370480538, arg1=4370705002) + 
73 at eval.c:2611
    frame #37: 0x00000001001421c7 Emacs`command_loop_1 + 2391 at keyboard.c:1559
    frame #38: 0x00000001001ffb9c 
Emacs`internal_condition_case(bfun=0x0000000100141870, handlers=4370487930, 
hfun=0x000000010015bcf0) + 396 at eval.c:1348
    frame #39: 0x000000010015bbe9 Emacs`command_loop_2(ignore=4345311290) + 41 
at keyboard.c:1177
    frame #40: 0x00000001001ff1d4 Emacs`internal_catch(tag=4370484122, 
func=0x000000010015bbc0, arg=4345311290) + 356 at eval.c:1112
    frame #41: 0x0000000100140deb Emacs`command_loop + 187 at keyboard.c:1156
    frame #42: 0x0000000100140cb4 Emacs`recursive_edit_1 + 132 at keyboard.c:777
    frame #43: 0x0000000100140f97 Emacs`Frecursive_edit + 327 at keyboard.c:848
    frame #44: 0x000000010013ef89 Emacs`main(argc=2, argv=0x00007fff5fbff680) + 
5929 at emacs.c:1646
    frame #45: 0x00007fff8ed825c9 libdyld.dylib`start + 1