Subject: 26.0.50; Crash on C-g with master as of d12e1ddf42

From: Sébastien Le Callonnec <[email-masked]>
Date: Mon, 30 Jan 2017 16:35:45 +0000

I am experiencing the same issue on master on OSX 10.11.6.

A bisect points to this commit:

1392ec7420ee23238a1588b759c631d87a677483 is the first bad commit
commit 1392ec7420ee23238a1588b759c631d87a677483
Author: Paul Eggert <[email-masked]>
Date:   Wed Jan 25 20:27:45 2017 -0800

    A quicker check for quit

    On some microbenchmarks this lets Emacs run 60% faster on my
    platform (AMD Phenom II X4 910e, Fedora 25 x86-64).
    * src/atimer.c: Include keyboard.h, for pending_signals.
    * src/editfns.c (Fcompare_buffer_substrings):
    * src/fns.c (Fnthcdr, Fmemq, Fmemql, Fassq, Frassq, Fplist_put)
    (Fnconc, Fplist_member):
    Set and clear immediate_quit before and after loop instead of
    executing QUIT each time through the loop.  This is OK for loops
    that affect only locals.
    * src/eval.c (process_quit_flag): Now static.
    (maybe_quit): New function, containing QUIT’s old body.
    * src/fns.c (rarely_quit): New function.
    (Fmember, Fassoc, Frassoc, Fdelete, Fnreverse, Freverse)
    (Flax_plist_get, Flax_plist_put, internal_equal, Fnconc):
    Use it instead of QUIT, for
    speed in tight loops that might modify non-locals.
    * src/keyboard.h (pending_signals, process_pending_signals):
    These belong to keyboard.c, so move them here ...
    * src/lisp.h: ... from here.
    (QUIT): Redefine in terms of the new maybe_quit function, which
    contains this macro’s old definiens.  This works well with branch
    prediction on processors with return stack buffers, e.g., x86
    other than the original Pentium.

:040000 040000 87d5a840fab3795a0ac0ddf3172aa487d2636e7f 3f764784c5b6b1ad19164a3d7997a66542aa7a3e M	src

Here is an excerpt of the crash report:

Process:               Emacs [23793]
Path:                  /Applications/Emacs.app/Contents/MacOS/Emacs
Identifier:            org.gnu.Emacs
Version:               Version 26.0.50 (9.0)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Emacs [23793]
User ID:               502

Date/Time:             2017-01-30 16:27:20.715 +0000
OS Version:            Mac OS X 10.11.6 (15G1212)

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff898c68ea __kill + 10
1   org.gnu.Emacs                 	0x00000001000bac99 terminate_due_to_signal + 153 (emacs.c:398)
2   org.gnu.Emacs                 	0x00000001000d76f3 emacs_abort + 19
3   org.gnu.Emacs                 	0x00000001001b3e3a ns_term_shutdown + 122
4   org.gnu.Emacs                 	0x00000001000bae75 shut_down_emacs + 261 (emacs.c:2094)
5   org.gnu.Emacs                 	0x00000001000bac66 terminate_due_to_signal + 102 (emacs.c:379)
6   org.gnu.Emacs                 	0x00000001000d76f3 emacs_abort + 19
7   org.gnu.Emacs                 	0x000000010013c93f signal_or_quit + 1391 (eval.c:1522)
8   org.gnu.Emacs                 	0x00000001000c6784 handle_interrupt + 340 (keyboard.c:10459)
9   org.gnu.Emacs                 	0x00000001000c1a48 gobble_input + 472 (.keyboard.h:472)
10  org.gnu.Emacs                 	0x00000001000c81b5 unblock_input + 69 (keyboard.c:7143)
11  org.gnu.Emacs                 	0x00000001001b2c87 ns_select + 903 (nsterm.m:4194)
12  org.gnu.Emacs                 	0x000000010019f5f8 really_call_select + 88 (thread.c:566)
13  org.gnu.Emacs                 	0x000000010011d81c flush_stack_call_func + 44 (alloc.c:5110)
14  org.gnu.Emacs                 	0x000000010019f597 thread_select + 55 (thread.c:590)
15  org.gnu.Emacs                 	0x00000001001832cd wait_reading_process_output + 4093 (process.c:5367)
16  org.gnu.Emacs                 	0x0000000100007e25 sit_for + 261 (dispnew.c:5766)
17  org.gnu.Emacs                 	0x00000001000c3202 read_char + 4802 (keyboard.c:2651)
18  org.gnu.Emacs                 	0x00000001000bffcb read_key_sequence + 1787 (keyboard.c:9139)
19  org.gnu.Emacs                 	0x00000001000be76d command_loop_1 + 1229 (keyboard.c:1373)
20  org.gnu.Emacs                 	0x000000010013c0f7 internal_condition_case + 87 (eval.c:1327)
21  org.gnu.Emacs                 	0x00000001000cd7a0 command_loop_2 + 48 (keyboard.c:1115)
22  org.gnu.Emacs                 	0x000000010013b9ae internal_catch + 78 (eval.c:1093)
23  org.gnu.Emacs                 	0x00000001000bd99e command_loop + 158 (keyboard.c:1095)
24  org.gnu.Emacs                 	0x00000001000bd8af recursive_edit_1 + 111 (keyboard.c:701)
25  org.gnu.Emacs                 	0x00000001000bdae3 Frecursive_edit + 227 (keyboard.c:772)
26  org.gnu.Emacs                 	0x00000001000bc6bd main + 6109 (emacs.c:1688)
27  libdyld.dylib                 	0x00007fff8ecf85ad start + 1

Thread 1:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 2:: Dispatch queue: com.apple.libdispatch-manager
0   libsystem_kernel.dylib        	0x00007fff898c7efa kevent_qos + 10
1   libdispatch.dylib             	0x00007fff8969f165 _dispatch_mgr_invoke + 216
2   libdispatch.dylib             	0x00007fff8969edcd _dispatch_mgr_thread + 52

Thread 3:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 4:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 5:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 6:
0   libsystem_kernel.dylib        	0x00007fff898c707a __select + 10
1   org.gnu.Emacs                 	0x00000001001b550e -[EmacsApp fd_handler:] + 286 (nsterm.m:5486)
2   com.apple.Foundation          	0x00007fff868f8e64 __NSThread__start__ + 1351
3   libsystem_pthread.dylib       	0x00007fff899f099d _pthread_body + 131
4   libsystem_pthread.dylib       	0x00007fff899f091a _pthread_start + 168
5   libsystem_pthread.dylib       	0x00007fff899ee351 thread_start + 13

Thread 7:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 8:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 9:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 10:
0   libsystem_kernel.dylib        	0x00007fff898c75e2 __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fff899f0578 _pthread_wqthread + 1283
2   libsystem_pthread.dylib       	0x00007fff899ee341 start_wqthread + 13

Thread 11:: com.apple.NSEventThread
0   libsystem_kernel.dylib        	0x00007fff898c0f72 mach_msg_trap + 10
1   libsystem_kernel.dylib        	0x00007fff898c03b3 mach_msg + 55
2   com.apple.CoreFoundation      	0x00007fff97843124 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation      	0x00007fff978425ec __CFRunLoopRun + 1356
4   com.apple.CoreFoundation      	0x00007fff97841e38 CFRunLoopRunSpecific + 296
5   com.apple.AppKit              	0x00007fff8f195d95 _NSEventThread + 149
6   libsystem_pthread.dylib       	0x00007fff899f099d _pthread_body + 131
7   libsystem_pthread.dylib       	0x00007fff899f091a _pthread_start + 168
8   libsystem_pthread.dylib       	0x00007fff899ee351 thread_start + 13

HTH,
Sébastien.