Re: [scratch/igc] 985247b6bee crash on Linux, KDE, Wayland

[Eli Zaretskii]

> From: Eval EXEC <execvy@gmail.com>
> Date: Thu, 05 Sep 2024 14:24:39 +0800
> 
> ```elisp
>   (setq-default tab-bar-format
>                               '(tab-bar-format-menu-bar
>                   tab-bar-format-history tab-bar-format-tabs
>                   tab-bar-separator tab-bar-format-add-tab
>                   tab-bar-separator tab-bar-format-align-right
>                   tab-bar-format-global))
> ```
> 
> Than, about 20 seconds after, the emacs crash, crash bt is:
> ```
>         info "(gdb)Auto-loading safe path"
> warning: File 
> "/nix/store/x47hg342iyiw50c1fhqjzz4n0rqy3dhh-isl-0.20/lib/libisl.so.19.1.0-gdb.py"
>  auto-loading has been declined by your `auto-load safe-path' set to 
> "$debugdir:$datadir/auto-load:/nix/store/40yjzm7r5ki59kkk9423dnwbm86x7pyd-gcc-13.2.0-lib".
> (gdb) bt
> #0  0x00007f84a90a2efc in __pthread_kill_implementation () from 
> /nix/store/dbcw19dshdwnxdv5q2g6wldj6syyvq7l-glibc-2.39-52/lib/libc.so.6
> #1  0x00007f84a9052e86 in raise () from 
> /nix/store/dbcw19dshdwnxdv5q2g6wldj6syyvq7l-glibc-2.39-52/lib/libc.so.6
> #2  0x0000000000429886 in terminate_due_to_signal ()
> #3  0x0000000000431d79 in igc_assert_fail.lto_priv[cold] ()
> #4  0x00000000007b0e60 in LockClaim ()
> #5  0x00000000007ddea5 in ArenaEnterLock ()
> #6  0x00000000007e01a1 in mps_ap_fill ()
> #7  0x00000000006e74b6 in alloc_impl.lto_priv ()
> #8  0x000000000060993b in list2 ()
> #9  0x000000000042da87 in xsignal2 ()
> #10 0x000000000042c379 in wrong_type_argument ()
> #11 0x0000000000430730 in get_process.lto_priv[cold] ()
> #12 0x00000000006bd653 in process_send_signal ()
> #13 0x00000000006be017 in kill_buffer_processes ()
> #14 0x000000000058efb5 in shut_down_emacs ()
> #15 0x0000000000429852 in terminate_due_to_signal ()
> #16 0x000000000042a38f in handle_sigsegv.lto_priv[cold] ()
> #17 <signal handler called>
> #18 0x00007f84a905316b in kill () from 
> /nix/store/dbcw19dshdwnxdv5q2g6wldj6syyvq7l-glibc-2.39-52/lib/libc.so.6
> #19 0x00000000007e3919 in sigHandle ()
> #20 <signal handler called>
> #21 0x000000000075d716 in dflt_scan_obj.isra ()
> #22 0x00000000006e288d in dflt_scan ()

Looks like a SIGSEGV while handling protection-induced SIGSEGV?  I
don't think I understand why the second SIGSEGV was triggered.

Is this related to tab-bar, i.e. if you do not modify tab-bar-format,
does this not happen?