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

[David Reitter]

Your change does not help.
 I think it’s a Yosemite bug.  Below is a workaround.

--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -4748,11 +4766,18 @@ ns_term_shutdown (int sig)
         [pool release];
         pool = [[NSAutoreleasePool alloc] init];

+       /* OSX 10.10.1 seems to swallow AppDefined events when
+          other events are put in the queue in rapid succession.
+          To prevent Emacs becoming unresponsive, we need to
+          set a reasonable timeout. */
         NSEvent *event =
           [self nextEventMatchingMask:NSAnyEventMask
-                            untilDate:[NSDate distantFuture]
+                            untilDate:[NSDate dateWithTimeIntervalSinceNow:0.5]
                                inMode:NSDefaultRunLoopMode
                               dequeue:YES];
+       if (event == nil) // timeout
+         { shouldKeepRunning = NO;}
+       else
         [self sendEvent:event];
         [self updateWindows];
     } while (shouldKeepRunning);


> On Nov 8, 2014, at 11:34 AM, Jan D. <jan.h.d@swipnet.se> wrote:
> 
> I can't reproduce this, but made some changes, please try it.
> 
>       Jan D.
> 
>> 29 okt 2014 kl. 14:47 skrev David Reitter <david.reitter@gmail.com>:
>> 
>> 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
>> 
>