bug#31904: bug##31904

Hi all,

I usually use Emacs 27 (AKA master). I upgraded to the latest Mojave beta (1 week until GM I believe, I was eager!)

Thanks Alan for providing the patch, I took the patch (which you said was based on emacs-26) and "updated"
(used the wiggle command for the hunks that wouldn't apply, I've never really meddled with Objective-C before and
I've never really updated a patch before when there's rejected hunks, so please excuse any ignorance you pick up on. :-)

The patch builds and launches Emacs successfully! (Thanks again Alan)

However, just thought I'd mention that after some time (5-10 minutes of idling, and just now it crashed during launch) I get the following:

Note that I believe I've compiled Emacs with debugging symbols and no optimisation, feel free to correct me if not.

Hopefully the below output is helpful to someone. This might even be a bug in Mojave and one of the core libraries, but I haven't had
this with other applications:

I can reproduce the issue within a maximum of 10 minutes, whether typing or not.

It's likely worthy to note that this happened also with the emacs-26 branch, commit d4fa83baf5462cfcf61ebbb8c0a0ec584d11c39a,
under the same circumstances, and with the attached patch applied.

Feel free to shout at me to submit this as a new bug, I couldn't find which email makes a new one. :-(

The below happens on commit 75d9a55fae1c484aa6d213064931bfe3b65cf5dd on the master branch.

objc[95306]: Invalid or prematurely-freed autorelease pool 0x103e60378.
Process 95306 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00007fff7679b01e libsystem_kernel.dylib`__abort_with_payload + 10
libsystem_kernel.dylib`__abort_with_payload:
->  0x7fff7679b01e <+10>: jae    0x7fff7679b028            ; <+20>
    0x7fff7679b020 <+12>: movq   %rax, %rdi
    0x7fff7679b023 <+15>: jmp    0x7fff7677de67            ; cerror_nocancel
    0x7fff7679b028 <+20>: retq
Target 0: (Emacs) stopped.
(lldb) bt all
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
  * frame #0: 0x00007fff7679b01e libsystem_kernel.dylib`__abort_with_payload + 10
    frame #1: 0x00007fff76796561 libsystem_kernel.dylib`abort_with_payload_wrapper_internal + 82
    frame #2: 0x00007fff7679650f libsystem_kernel.dylib`abort_with_reason + 22
    frame #3: 0x00007fff75579674 libobjc.A.dylib`_objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 108
    frame #4: 0x00007fff75579526 libobjc.A.dylib`_objc_fatal(char const*, ...) + 135
    frame #5: 0x00007fff7556bd73 libobjc.A.dylib`(anonymous namespace)::AutoreleasePoolPage::pop(void*) + 957
    frame #6: 0x00007fff46c2d232 AppKit`-[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inContext:shouldChangeFontReferenceColor:stopAtLayerBackedViews:] + 3454
    frame #7: 0x00007fff46c2c4a2 AppKit`__46-[NSView(NSLayerKitGlue) drawLayer:inContext:]_block_invoke + 192
    frame #8: 0x00007fff46c2c201 AppKit`-[NSView(NSLayerKitGlue) _drawViewBackingLayer:inContext:drawingHandler:] + 1769
    frame #9: 0x00007fff54540aaf QuartzCore`CABackingStoreUpdate_ + 577
    frame #10: 0x00007fff545a2325 QuartzCore`___ZN2CA5Layer8display_Ev_block_invoke + 53
    frame #11: 0x00007fff5453fc90 QuartzCore`-[CALayer _display] + 1839
    frame #12: 0x00007fff46c2b75a AppKit`_NSBackingLayerDisplay + 531
    frame #13: 0x00007fff46c0fcc9 AppKit`-[_NSViewBackingLayer display] + 811
    frame #14: 0x00007fff46c0f949 AppKit`_NSBackingLayerDisplayIfNeeded + 40
    frame #15: 0x00007fff46c0f2a4 AppKit`-[NSView displayIfNeeded] + 130
    frame #16: 0x0000000100026514 Emacs`echo_area_display + 593
    frame #17: 0x00000001000261ca Emacs`message3_nolog + 393
    frame #18: 0x0000000100025fe3 Emacs`message3 + 399
    frame #19: 0x0000000100106a03 Emacs`Fmessage + 67
    frame #20: 0x000000010010f525 Emacs`Ffuncall + 665
    frame #21: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #22: 0x0000000100110040 Emacs`funcall_lambda + 648
    frame #23: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #24: 0x000000010010f704 Emacs`funcall_nil + 9
    frame #25: 0x000000010010f6a0 Emacs`run_hook_with_args + 198
    frame #26: 0x000000010010f58b Emacs`Frun_hooks + 60
    frame #27: 0x000000010010f525 Emacs`Ffuncall + 665
    frame #28: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #29: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #30: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #31: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #32: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #33: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #34: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #35: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #36: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #37: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #38: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #39: 0x000000010010ee62 Emacs`apply_lambda + 369
    frame #40: 0x000000010010c484 Emacs`eval_sub + 845
    frame #41: 0x000000010012d294 Emacs`readevalloop + 1773
    frame #42: 0x000000010012d502 Emacs`Feval_buffer + 368
    frame #43: 0x000000010010fcfe Emacs`funcall_subr + 367
    frame #44: 0x000000010010f525 Emacs`Ffuncall + 665
    frame #45: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #46: 0x0000000100110040 Emacs`funcall_lambda + 648
    frame #47: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #48: 0x000000010010f9d1 Emacs`call4 + 58
    frame #49: 0x000000010012b845 Emacs`Fload + 1373
    frame #50: 0x000000010010fcfe Emacs`funcall_subr + 367
    frame #51: 0x000000010010f525 Emacs`Ffuncall + 665
    frame #52: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #53: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #54: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #55: 0x000000010010f4c2 Emacs`Ffuncall + 566
    frame #56: 0x0000000100145e02 Emacs`exec_byte_code + 1486
    frame #57: 0x000000010010ee62 Emacs`apply_lambda + 369
    frame #58: 0x000000010010c484 Emacs`eval_sub + 845
    frame #59: 0x000000010010ec69 Emacs`Feval + 96
    frame #60: 0x000000010010dffd Emacs`internal_condition_case + 87
    frame #61: 0x00000001000b17be Emacs`top_level_1 + 45
    frame #62: 0x000000010010db85 Emacs`internal_catch + 74
    frame #63: 0x00000001000a4a90 Emacs`command_loop + 141
    frame #64: 0x00000001000a49c1 Emacs`recursive_edit_1 + 115
    frame #65: 0x00000001000a4bdd Emacs`Frecursive_edit + 226
    frame #66: 0x00000001000a3aa9 Emacs`main + 5211
    frame #67: 0x00007fff76645085 libdyld.dylib`start + 1
    frame #68: 0x00007fff76645085 libdyld.dylib`start + 1
  thread #2
    frame #0: 0x00007fff7677f5be libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x6874656d00000000
    frame #2: 0x00007fff76836415 libsystem_pthread.dylib`start_wqthread + 13
  thread #3
    frame #0: 0x00007fff7677f5be libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff76836641 libsystem_pthread.dylib`_pthread_wqthread + 446
    frame #2: 0x00007fff76836415 libsystem_pthread.dylib`start_wqthread + 13
  thread #4, name = 'gmain'
    frame #0: 0x00007fff76784e82 libsystem_kernel.dylib`__select + 10
    frame #1: 0x0000000100a083da libglib-2.0.0.dylib`g_poll + 405
    frame #2: 0x00000001009fc123 libglib-2.0.0.dylib`g_main_context_iterate + 340
    frame #3: 0x00000001009fc1d1 libglib-2.0.0.dylib`g_main_context_iteration + 55
    frame #4: 0x00000001009fd2b0 libglib-2.0.0.dylib`glib_worker_main + 30
    frame #5: 0x0000000100a1dcb7 libglib-2.0.0.dylib`g_thread_proxy + 90
    frame #6: 0x00007fff7683733d libsystem_pthread.dylib`_pthread_body + 126
    frame #7: 0x00007fff7683a2a7 libsystem_pthread.dylib`_pthread_start + 70
    frame #8: 0x00007fff76836425 libsystem_pthread.dylib`thread_start + 13
  thread #5
    frame #0: 0x00007fff7677f5be libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff76836721 libsystem_pthread.dylib`_pthread_wqthread + 670
    frame #2: 0x00007fff76836415 libsystem_pthread.dylib`start_wqthread + 13
  thread #7
    frame #0: 0x00007fff76784e82 libsystem_kernel.dylib`__select + 10
    frame #1: 0x000000010017c408 Emacs`-[EmacsApp fd_handler:] + 214
    frame #2: 0x00007fff4b902234 Foundation`__NSThread__start__ + 1218
    frame #3: 0x00007fff7683733d libsystem_pthread.dylib`_pthread_body + 126
    frame #4: 0x00007fff7683a2a7 libsystem_pthread.dylib`_pthread_start + 70
    frame #5: 0x00007fff76836425 libsystem_pthread.dylib`thread_start + 13
  thread #9, name = 'com.apple.NSEventThread'
    frame #0: 0x00007fff7677dc2a libsystem_kernel.dylib`mach_msg_trap + 10
    frame #1: 0x00007fff7677e174 libsystem_kernel.dylib`mach_msg + 60
    frame #2: 0x00007fff495ad05e CoreFoundation`__CFRunLoopServiceMachPort + 337
    frame #3: 0x00007fff495ac5ad CoreFoundation`__CFRunLoopRun + 1654
    frame #4: 0x00007fff495abce4 CoreFoundation`CFRunLoopRunSpecific + 463
    frame #5: 0x00007fff46b0b581 AppKit`_NSEventThread + 160
    frame #6: 0x00007fff7683733d libsystem_pthread.dylib`_pthread_body + 126
    frame #7: 0x00007fff7683a2a7 libsystem_pthread.dylib`_pthread_start + 70
    frame #8: 0x00007fff76836425 libsystem_pthread.dylib`thread_start + 13
(lldb)

From:	Zack Piper
Subject:	bug#31904: bug##31904
Date:	Wed, 19 Sep 2018 17:36:27 +0100