GNU bug report logs -
#38748
28.0.50; crash on MacOS 10.15.2
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Reported by: Andrii Kolomoiets <andreyk.mad <at> gmail.com>
Date: Thu, 26 Dec 2019 09:49:01 UTC
Severity: normal
Merged with 38822
Found in versions 27.0.60, 28.0.50
Fixed in version 27.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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>>>>> On Thu, 09 Jan 2020 16:16:03 +0200, Eli Zaretskii <eliz <at> gnu.org> said:
>> From: Robert Pluim <rpluim <at> gmail.com>
>> Cc: 38748 <at> debbugs.gnu.org, pipcet <at> gmail.com, alan <at> idiocy.org,
>> jguenther <at> gmail.com, andreyk.mad <at> gmail.com
>> Date: Thu, 09 Jan 2020 11:31:25 +0100
>>
Eli> Also, can I please see one backtrace with all the call-stack frames,
Eli> starting from 'main' and ending at 'handle_fatal_signal'? The
Eli> original report shows only the top-most 511 frames, and the other one
Eli> has a lot of ?? (missing symbols) in it.
>>
>> 'bt full' backtrace attached.
Eli> Thanks.
>> Thread 2 received signal SIGSEGV, Segmentation fault.
>> 0x0000000100221f88 in vector_marked_p (v=0x20a000000000) at alloc.c:3726
>> 3726 return XVECTOR_MARKED_P (v);
>> (gdb) bt full
>> #0 0x0000000100221f88 in vector_marked_p (v=0x20a000000000) at alloc.c:3726
>> No locals.
>> #1 0x00000001002255e5 in vectorlike_marked_p (header=0x20a000000000)
>> at alloc.c:3744
>> No locals.
>> #2 0x00000001002221c2 in mark_frame (ptr=0x164cc69a0) at alloc.c:6321
>> font = 0x20a000000000
>> f = 0x164cc69a0
Eli> This says that we were marking a frame, and its default font is a
Eli> garbled pointer. Are all of the crashes you see happen because of a
Eli> faulty frame font in this snippet:
Eli> static void
Eli> mark_frame (struct Lisp_Vector *ptr)
Eli> {
Eli> struct frame *f = (struct frame *) ptr;
Eli> mark_vectorlike (&ptr->header);
Eli> mark_face_cache (f->face_cache);
Eli> #ifdef HAVE_WINDOW_SYSTEM
Eli> if (FRAME_WINDOW_P (f) && FRAME_OUTPUT_DATA (f))
Eli> {
Eli> struct font *font = FRAME_FONT (f);
Eli> if (font && !vectorlike_marked_p (&font->header)) <<<<<<<<<<<<
Eli> mark_vectorlike (&font->header);
Eli> }
Eli> #endif
Eli> }
Eli> I hope you still have this crashed session in the debugger. If so,
Eli> please tell: do you have many frames in that session, or just a few
Eli> (perhaps even one)? I'd like to see some more details about this
Eli> frame, if possible.
I donʼt have it right now, but itʼs easy enough to recreate the crash
(and yes, I tend to have half a dozen frames open). What details would
you like?
Robert
This bug report was last modified 4 years and 300 days ago.
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