bug#70059: 30.0.50; c-ts-mode crashes emacs

[Eli Zaretskii]

> From: Felix <felix.dick@web.de>
> Cc: Yuan Fu <casouri@gmail.com>,  70059@debbugs.gnu.org
> Date: Fri, 29 Mar 2024 12:37:03 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Felix <felix.dick@web.de>
> >> Cc: Andrea Corallo <acorallo@gnu.org>,  70059@debbugs.gnu.org
> >> Date: Fri, 29 Mar 2024 11:51:06 +0100
> >>
> >> I rebuild it without native-compilation, and it still crashes.
> >> Backtrace:
> >>
> >> #0  0x000077b79c65c32c in ??? () at /usr/lib/libc.so.6
> >> #1  0x000077b79c60b6c8 in raise () at /usr/lib/libc.so.6
> >> #2  0x00005a5a428f94a2 in terminate_due_to_signal ()
> >> #3  0x00005a5a42933c23 in emacs_abort ()
> >> #4  0x00005a5a429ec268 in signal_or_quit ()
> >> #5  0x00005a5a429eb422 in Fsignal ()
> >> #6  0x00005a5a429eb401 in xsignal ()
> >> #7  0x00005a5a429e9aa2 in xsignal2 ()
> >> #8  0x00005a5a429c0865 in wrong_type_argument ()
> >> #9  0x00005a5a42965e1f in Fexpand_file_name ()
> >> #10 0x00005a5a42b3d200 in Fdo_auto_save.7873 ()
> >> #11 0x00005a5a428f9738 in shut_down_emacs ()
> >> #12 0x00005a5a428f946a in terminate_due_to_signal ()
> >> #13 0x00005a5a42935924 in handle_sigsegv ()
> >> #14 0x000077b79c60b770 in <signal handler called> () at /usr/lib/libc.so.6
> >> #15 0x00005a5a429a57f6 in process_mark_stack ()
> >> #16 0x00005a5a429a677b in mark_char_table ()
> >> #17 0x00005a5a429a68c6 in mark_char_table ()
> >> #18 0x00005a5a429a55bd in process_mark_stack ()
> >> #19 0x00005a5a429a677b in mark_char_table ()
> >> #20 0x00005a5a429a68c6 in mark_char_table ()
> >> #21 0x00005a5a429a55bd in process_mark_stack ()
> >> #22 0x00005a5a429a677b in mark_char_table ()
> >> #23 0x00005a5a429a68c6 in mark_char_table ()
> >> #24 0x00005a5a429a55bd in process_mark_stack ()
> >> #25 0x00005a5a429a677b in mark_char_table ()
> >> #26 0x00005a5a429a68c6 in mark_char_table ()
> >> #27 0x00005a5a429a55bd in process_mark_stack ()
> >> #28 0x00005a5a429a569b in process_mark_stack ()
> >> #29 0x00005a5a429a569b in process_mark_stack ()
> >> #30 0x00005a5a429a569b in process_mark_stack ()
> >> #31 0x00005a5a429a7b8e in garbage_collect ()
> >> #32 0x00005a5a429e76e7 in Ffuncall ()
> >> #33 0x00005a5a42a094f7 in mapcar1 ()
> >> #34 0x00005a5a42a091bf in Fmapconcat ()
> >> #35 0x00005a5a42ac9d90 in Ftreesit_pattern_expand ()
> >> #36 0x00005a5a429e87b3 in funcall_subr ()
> >> #37 0x00005a5a429e77f6 in Ffuncall ()
> >> #38 0x00005a5a42a094f7 in mapcar1 ()
> >> #39 0x00005a5a42a091bf in Fmapconcat ()
> >> #40 0x00005a5a42ac9d90 in Ftreesit_pattern_expand ()
> >> #41 0x00005a5a429e87b3 in funcall_subr ()
> >> #42 0x00005a5a429e77f6 in Ffuncall ()
> >> #43 0x00005a5a42a094f7 in mapcar1 ()
> >> #44 0x00005a5a42a091bf in Fmapconcat ()
> >> #45 0x00005a5a42aca243 in treesit_ensure_query_compiled ()
> >> #46 0x00005a5a42aca5c0 in Ftreesit_query_capture ()
> >
> > Then it's strange, since it doesn't happen here.  Does it happen for
> > you with any C source file, including those in the Emacs source tree?
> > If this happens only for some files, can you post one such file?
> >
> > Also, what version of the tree-sitter library are you using, and what
> > version of the C grammar library?
> >
> > If you can build the emacs-29 branch, can you try reproducing there?
> >
> > Yuan, any ideas, based on the backtrace?
> 
> I was using tree-sitter build from the git repository, when i use it
> from the official arch linux repos, it doesn't crash (at least until
> now).
> I think this is tree-sitter related, but it shouldn't be able to crash
> emacs, should it?

It shouldn't, unless there's some memory-related snafu (which could
explain why the crash is always in GC).  I hope Yuan will be able to
tell.