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I've been experiencing a crash since upgrading to Emacs 26.1 and MacOS 10.13.4. It happens when running server-start (which is in my .emacs file), and a stale server auth file exists from a previous Emacs instance.

Reproducing it is easy:

  1. Start Emacs 26.1.
  2. Customive variable server-use-tcp; set value to t and save for future sessions.
  3. Run server-start.
  4. Copy the file server in the {server-auth-dir} folder to server-2.
  5. Quit Emacs.
  6. Rename server-2 file to server.
  7. Relaunch Emacs.
  8. Run server-start.
  9. Observe crash.

The crash log that I see is:

Process: Emacs-x86_64-10_10 [54595] Path: /Applications/Emacs.app/Contents/MacOS/Emacs-x86_64-10_10 Identifier: org.gnu.Emacs Version: Version 26.1 (9.0) Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: Emacs-x86_64-10_10 [54595] User ID: 501 Date/Time: 2018-06-15 11:11:33.871 -0600 OS Version: Mac OS X 10.13.4 (17E199) Report Version: 12 Anonymous UUID: FAFB472E-6635-1BF9-3A87-39490D81E931 Sleep/Wake UUID: 62FC5A60-36B2-453C-832A-C3FD5AA072DE Time Awake Since Boot: 180000 seconds Time Since Wake: 12000 seconds System Integrity Protection: disabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGABRT) Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000003f Exception Note: EXC_CORPSE_NOTIFY VM Regions Near 0x3f: --> __TEXT 0000000100000000-0000000100233000 [ 2252K] r-x/rwx SM=COW /Applications/Emacs.app/Contents/MacOS/Emacs-x86_64-10_10 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff654e5b6e __pthread_kill + 10 1 libsystem_pthread.dylib 0x00007fff656b0080 pthread_kill + 333 2 libsystem_c.dylib 0x00007fff653f36fe raise + 26 3 Emacs-x86_64-10_10 0x00000001000c0a81 terminate_due_to_signal + 161 4 Emacs-x86_64-10_10 0x00000001000dde43 emacs_abort + 19 5 Emacs-x86_64-10_10 0x00000001001c4a0c ns_term_shutdown + 124 6 Emacs-x86_64-10_10 0x00000001000c0c55 shut_down_emacs + 261 7 Emacs-x86_64-10_10 0x00000001000c0a46 terminate_due_to_signal + 102 8 Emacs-x86_64-10_10 0x00000001000df736 deliver_fatal_thread_signal + 134 9 Emacs-x86_64-10_10 0x00000001000e0b8a handle_sigsegv + 170 10 libsystem_platform.dylib 0x00007fff656a3f5a _sigtramp + 26 11 ??? 000000000000000000 0 + 0 12 Emacs-x86_64-10_10 0x0000000100146a67 funcall_subr + 247 13 Emacs-x86_64-10_10 0x0000000100146114 Ffuncall + 740 14 Emacs-x86_64-10_10 0x00000001001888c8 exec_byte_code + 2248 15 Emacs-x86_64-10_10 0x00000001001460b5 Ffuncall + 645 16 Emacs-x86_64-10_10 0x00000001001888c8 exec_byte_code + 2248 17 Emacs-x86_64-10_10 0x00000001001460b5 Ffuncall + 645 18 Emacs-x86_64-10_10 0x000000010013f846 Ffuncall_interactively + 70 19 Emacs-x86_64-10_10 0x0000000100146114 Ffuncall + 740 20 Emacs-x86_64-10_10 0x00000001001410ff Fcall_interactively + 6303 21 Emacs-x86_64-10_10 0x0000000100146a8b funcall_subr + 283 22 Emacs-x86_64-10_10 0x0000000100146114 Ffuncall + 740 23 Emacs-x86_64-10_10 0x00000001001888c8 exec_byte_code + 2248 24 Emacs-x86_64-10_10 0x00000001001460b5 Ffuncall + 645 25 Emacs-x86_64-10_10 0x00000001001888c8 exec_byte_code + 2248 26 Emacs-x86_64-10_10 0x00000001001460b5 Ffuncall + 645 27 Emacs-x86_64-10_10 0x000000010013f846 Ffuncall_interactively + 70 28 Emacs-x86_64-10_10 0x0000000100146114 Ffuncall + 740 29 Emacs-x86_64-10_10 0x0000000100145c4f Fapply + 575 30 Emacs-x86_64-10_10 0x00000001001400ba Fcall_interactively + 2138 31 Emacs-x86_64-10_10 0x0000000100146a8b funcall_subr + 283 32 Emacs-x86_64-10_10 0x0000000100146114 Ffuncall + 740 33 Emacs-x86_64-10_10 0x00000001001888c8 exec_byte_code + 2248 34 Emacs-x86_64-10_10 0x00000001001460b5 Ffuncall + 645 35 Emacs-x86_64-10_10 0x00000001001466cd call1 + 45 36 Emacs-x86_64-10_10 0x00000001000c4b73 command_loop_1 + 1987 37 Emacs-x86_64-10_10 0x0000000100144907 internal_condition_case + 87 38 Emacs-x86_64-10_10 0x00000001000d59b0 command_loop_2 + 48 39 Emacs-x86_64-10_10 0x00000001001441ae internal_catch + 78 40 Emacs-x86_64-10_10 0x00000001000c3a5e command_loop + 158 41 Emacs-x86_64-10_10 0x00000001000c3982 recursive_edit_1 + 130 42 Emacs-x86_64-10_10 0x00000001000c3ba5 Frecursive_edit + 229 43 Emacs-x86_64-10_10 0x00000001000c25a2 main + 6370 44 libdyld.dylib 0x00007fff65395015 start + 1 Thread 1: 0 libsystem_kernel.dylib 0x00007fff654e6292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff656ad20e _pthread_wqthread + 1552 2 libsystem_pthread.dylib 0x00007fff656acbe9 start_wqthread + 13 Thread 2: 0 libsystem_kernel.dylib 0x00007fff654e6292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff656ad20e _pthread_wqthread + 1552 2 libsystem_pthread.dylib 0x00007fff656acbe9 start_wqthread + 13 Thread 3: 0 libsystem_kernel.dylib 0x00007fff654e6292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff656ad20e _pthread_wqthread + 1552 2 libsystem_pthread.dylib 0x00007fff656acbe9 start_wqthread + 13 Thread 4: 0 libsystem_kernel.dylib 0x00007fff654e6292 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff656ad20e _pthread_wqthread + 1552 2 libsystem_pthread.dylib 0x00007fff656acbe9 start_wqthread + 13 Thread 5: 0 libsystem_kernel.dylib 0x00007fff654e5cfa __select + 10 1 Emacs-x86_64-10_10 0x00000001001c605f -[EmacsApp fd_handler:] + 255 2 com.apple.Foundation 0x00007fff3f17d1f8 __NSThread__start__ + 1197 3 libsystem_pthread.dylib 0x00007fff656ad661 _pthread_body + 340 4 libsystem_pthread.dylib 0x00007fff656ad50d _pthread_start + 377 5 libsystem_pthread.dylib 0x00007fff656acbf9 thread_start + 13 Thread 6: 0 libsystem_pthread.dylib 0x00007fff656acbdc start_wqthread + 0 1 ??? 0x6e496d656d685373 0 + 7947003299866628979 Thread 7: 0 libsystem_pthread.dylib 0x00007fff656acbdc start_wqthread + 0 1 ??? 0x4058504320000000 0 + 4636544065607827456 Thread 8:: com.apple.NSEventThread 0 libsystem_kernel.dylib 0x00007fff654dc20a mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff654db724 mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff3d0807d5 __CFRunLoopServiceMachPort + 341 3 com.apple.CoreFoundation 0x00007fff3d07fb27 __CFRunLoopRun + 1783 4 com.apple.CoreFoundation 0x00007fff3d07f1a3 CFRunLoopRunSpecific + 483 5 com.apple.AppKit 0x00007fff3a757fc4 _NSEventThread + 184 6 libsystem_pthread.dylib 0x00007fff656ad661 _pthread_body + 340 7 libsystem_pthread.dylib 0x00007fff656ad50d _pthread_start + 377 8 libsystem_pthread.dylib 0x00007fff656acbf9 thread_start + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x00007fff9d9c5380 rcx: 0x000000010063c8e8 rdx: 0x0000000000000000 rdi: 0x0000000000000307 rsi: 0x0000000000000006 rbp: 0x000000010063c920 rsp: 0x000000010063c8e8 r8: 0x000000000000007f r9: 0x0000000100c29850 r10: 0x0000000000000000 r11: 0x0000000000000287 r12: 0x0000000000000307 r13: 0x2000000000000000 r14: 0x0000000000000006 r15: 0x000000000000002d rip: 0x00007fff654e5b6e rfl: 0x0000000000000286 cr2: 0x000000010063b868 Logical CPU: 0 Error Code: 0x02000148 Trap Number: 133 ... snip ...

Full crash log here: https://gist.github.com/timcharper/098fab7860d81c52a9014dc6c8544edc

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3
  • 1
    M-x report-emacs-bug RET, maybe? Commented Jun 15, 2018 at 21:40
  • did it :) Posting here for more visibility. And to share my workaround Commented Jun 16, 2018 at 6:07
  • 1
    For reference, this is Bug#31848 & Bug#32376 Commented Aug 12, 2018 at 23:36

1 Answer 1

Reset to default
1

Here is a work-around that has worked for me:

;; server-start workaround (defun ss-work-around/server-auth-file-name () (format "%s/%s" server-auth-dir "server")) (defun ss-work-around/server-port () (let ((server-auth-filename (ss-work-around/server-auth-file-name))) (when (file-exists-p server-auth-filename) (with-temp-buffer (progn (insert-file-contents-literally server-auth-filename) (search-forward ":") (let ((start (point))) (search-forward " ") (buffer-substring-no-properties start (- (point) 1)))))))) (defun ss-work-around/port-is-reachable (port) (with-temp-buffer (let ((exit-status (shell-command (format "lsof -i :%s" server-port) (current-buffer) (current-buffer)))) (eq 0 exit-status)))) (defun ss-work-around/remove-stale-server-auth-file () (let ((server-port (ss-work-around/server-port))) (when (and server-port (not (ss-work-around/port-is-reachable server-port))) (message "Removing stale server file %s for port %s" (ss-work-around/server-auth-file-name) server-port) (delete-file (ss-work-around/server-auth-file-name)))) ) (ss-work-around/remove-stale-server-auth-file) (server-start)
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  • I suppose a simpler workaround might be to disable server-use-tcp if you don't need it. Commented Jun 21, 2018 at 23:41

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