GNU bug report logs - #47284
emacs 26/27 SEGV

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefan <at> marxist.se>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#47284: closed (emacs 26/27 SEGV)
Date: Tue, 26 Oct 2021 21:13:02 +0000

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Your message dated Tue, 26 Oct 2021 23:12:27 +0200
with message-id <CADwFkm=EVgnV5go4MOjNCRMXqHGW8V8CnWvuPKZdbJtzRYpo4g <at> mail.gmail.com>
and subject line Re: bug#47284: emacs 26/27 SEGV
has caused the debbugs.gnu.org bug report #47284,
regarding emacs 26/27 SEGV
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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47284: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=47284
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Contact help-debbugs <at> gnu.org with problems

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From: Tjernlund <tjernlund <at> tjernlund.se>
To: bug-gnu-emacs <at> gnu.org
Subject: emacs 26/27 SEGV
Date: Sat, 20 Mar 2021 21:17:28 +0100

File / Revert Buffer in the menu bar over a remote display with ping > 3 ms gives me a SEGV:

(gdb) bt
#0  0x00007ffff7ddc594 in GetnormalGC (lw=lw <at> entry=0x555556999670) at Label.c:310
#1  0x00007ffff7ddcc92 in Initialize (request=<optimized out>, new=0x555556999670, args=<optimized out>, num_args=<optimized out>) at Label.c:401
#2  0x00007ffff7d543b9 in CallInitialize
    (class=0x7ffff7e19280 <labelClassRec>, req_widget=req_widget <at> entry=0x7fffffffb710, new_widget=new_widget <at> entry=0x555556999670, args=args <at> entry=0x7fffffffbb80, num_args=<optimized out>, num_args <at> entry=0x4) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:219
#3  0x00007ffff7d54d30 in xtCreate
    (name=name <at> entry=0x7ffff7e06065 "label", class=class <at> entry=0x0, widget_class=widget_class <at> entry=0x7ffff7e19280 <labelClassRec>, parent=parent <at> entry=0x555556999440, default_screen=0x555555e21bf0, args=args <at> entry=0x7fffffffbb80, num_args=0x4, typed_args=0x0, num_typed_args=<optimized out>, parent_constraint_class=0x7ffff7e18ac0 <dialogClassRec>, post_proc=0x7ffff7d54400 <widgetPostProc>) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:415
#4  0x00007ffff7d55202 in _XtCreateWidget
    (name=name <at> entry=0x7ffff7e06065 "label", widget_class=widget_class <at> entry=0x7ffff7e19280 <labelClassRec>, parent=parent <at> entry=0x555556999440, args=args <at> entry=0x7fffffffbb80, num_args=0x4, typed_args=typed_args <at> entry=0x0, num_typed_args=<optimized out>) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:581
#5  0x00007ffff7d55582 in XtCreateManagedWidget
    (name=name <at> entry=0x7ffff7e06065 "label", widget_class=0x7ffff7e19280 <labelClassRec>, parent=parent <at> entry=0x555556999440, args=args <at> entry=0x7fffffffbb80, num_args=<optimized out>) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:619
#6  0x00007ffff7ddae7f in Initialize (request=<optimized out>, new=0x555556999440, args=<optimized out>, num_args=<optimized out>) at Dialog.c:176
#7  0x00007ffff7d543b9 in CallInitialize
    (class=0x7ffff7e18ac0 <dialogClassRec>, req_widget=req_widget <at> entry=0x7fffffffbda0, new_widget=new_widget <at> entry=0x555556999440, args=args <at> entry=0x7fffffffc2b0, num_args=<optimized out>, num_args <at> entry=0x0) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:219
#8  0x00007ffff7d54d30 in xtCreate
    (name=name <at> entry=0x5555568f4b50 "Q2BR1", class=class <at> entry=0x0, widget_class=widget_class <at> entry=0x7ffff7e18ac0 <dialogClassRec>, parent=parent <at> entry=0x55555692ab30, default_screen=0x555555e21bf0, args=args <at> entry=0x7fffffffc2b0, num_args=0x0, typed_args=0x0, num_typed_args=<optimized out>, parent_constraint_class=0x0, post_proc=0x7ffff7d54400 <widgetPostProc>) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:415
#9  0x00007ffff7d55202 in _XtCreateWidget
    (name=name <at> entry=0x5555568f4b50 "Q2BR1", widget_class=widget_class <at> entry=0x7ffff7e18ac0 <dialogClassRec>, parent=parent <at> entry=0x55555692ab30, args=args <at> entry=0x7fffffffc2b0, num_args=0x0, typed_args=typed_args <at> entry=0x0, num_typed_args=<optimized out>) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:581
#10 0x00007ffff7d55582 in XtCreateManagedWidget
    (name=name <at> entry=0x5555568f4b50 "Q2BR1", widget_class=0x7ffff7e18ac0 <dialogClassRec>, parent=parent <at> entry=0x55555692ab30, args=args <at> entry=0x7fffffffc2b0, num_args=num_args <at> entry=0x0) at /var/tmp/portage/x11-libs/libXt-1.2.1/work/libXt-1.2.1/src/Create.c:619
#11 0x0000555555774c37 in make_dialog
    (name=0x5555568f4b50 "Q2BR1", parent=<optimized out>, pop_up_p=<optimized out>, shell_title=0x555555798741 "Question", text_input_slot=<optimized out>, radio_box=<optimized out>, list=0x0, left_buttons=0x1, right_buttons=0x1, instance=0x5555568f4c90, icon_name=<optimized out>) at lwlib-Xaw.c:553
#12 0x00005555557758e7 in xaw_create_dialog (instance=<optimized out>) at lwlib-Xaw.c:731
#13 0x000055555576e867 in instantiate_widget_instance (instance=0x5555568f4c90) at lwlib.c:726
#14 allocate_widget_instance (pop_up_p=0x1, parent=<optimized out>, info=<optimized out>) at lwlib.c:223
#15 lw_make_widget (id=<optimized out>, parent=<optimized out>, pop_up_p=<optimized out>) at lwlib.c:770
#16 0x00005555555f5c41 in create_and_show_dialog (f=0x555555efeea0, first_wv=0x5555568f4ac0) at xmenu.c:1788
#17 x_dialog_show (title=<optimized out>, error_name=<synthetic pointer>, header=0x0, f=0x555555efeea0) at xmenu.c:1940
#18 xw_popup_dialog (f=0x555555efeea0, header=0x0, contents=<optimized out>) at xmenu.c:2003
#19 0x00005555556f1256 in Fyes_or_no_p (prompt=0x5555568c8ef4) at lisp.h:1027
#20 0x00005555556e6873 in Ffuncall (nargs=0x2, args=args <at> entry=0x7fffffffc748) at eval.c:2795
#21 0x0000555555717fc8 in exec_byte_code
    (bytestr=<optimized out>, vector=<optimized out>, maxdepth=<optimized out>, args_template=<optimized out>, nargs=<optimized out>, args=<optimized out>) at bytecode.c:633
#22 0x00005555556e67d7 in Ffuncall (nargs=0x3, args=args <at> entry=0x7fffffffcb50) at eval.c:2809
#23 0x0000555555717fc8 in exec_byte_code
    (bytestr=<optimized out>, vector=<optimized out>, maxdepth=<optimized out>, args_template=<optimized out>, nargs=<optimized out>, args=<optimized out>) at bytecode.c:633
#24 0x00005555556e67d7 in Ffuncall (nargs=nargs <at> entry=0x2, args=args <at> entry=0x7fffffffd008) at eval.c:2809
#25 0x00005555556e31e1 in Ffuncall_interactively (nargs=0x2, args=0x7fffffffd008) at callint.c:254
#26 0x00005555556e6873 in Ffuncall (nargs=0x3, args=0x7fffffffd000) at eval.c:2795
#27 0x00005555556e6c33 in Fapply (nargs=nargs <at> entry=0x3, args=args <at> entry=0x7fffffffd000) at eval.c:2382
#28 0x00005555556e474a in Fcall_interactively (function=0x2aaa9d3fc650, record_flag=0x0, keys=0x7ffff350180d) at callint.c:342
#29 0x00005555556e6873 in Ffuncall (nargs=0x4, args=args <at> entry=0x7fffffffd0f8) at eval.c:2795
#30 0x0000555555717fc8 in exec_byte_code
    (bytestr=<optimized out>, vector=<optimized out>, maxdepth=<optimized out>, args_template=<optimized out>, nargs=<optimized out>, args=<optimized out>) at bytecode.c:633
#31 0x00005555556e67d7 in Ffuncall (nargs=0x2, args=0x7fffffffd4a0) at eval.c:2809
#32 0x00005555556e692a in call1 (fn=fn <at> entry=0x4320, arg1=<optimized out>) at eval.c:2655
#33 0x000055555567e728 in command_loop_1 () at lisp.h:1027
#34 0x00005555556e5b07 in internal_condition_case (bfun=bfun <at> entry=0x55555567e330 <command_loop_1>, handlers=handlers <at> entry=0x90, hfun=hfun <at> entry=0x555555675240 <cmd_error>)
--Type <RET> for more, q to quit, c to continue without paging--
    at eval.c:1356
#35 0x000055555566ff14 in command_loop_2 (ignore=ignore <at> entry=0x0) at lisp.h:1027
#36 0x00005555556e5a61 in internal_catch (tag=tag <at> entry=0xd3e0, func=func <at> entry=0x55555566fef0 <command_loop_2>, arg=arg <at> entry=0x0) at eval.c:1117
#37 0x000055555566febb in command_loop () at lisp.h:1027
#38 0x0000555555674e56 in recursive_edit_1 () at keyboard.c:714
#39 0x0000555555675182 in Frecursive_edit () at keyboard.c:786
#40 0x000055555559bb1f in main (argc=0x2, argv=<optimized out>) at emacs.c:2067

[Message part 3 (message/rfc822, inline)]

From: Stefan Kangas <stefan <at> marxist.se>
To: Tjernlund <tjernlund <at> tjernlund.se>
Cc: 47284-done <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#47284: emacs 26/27 SEGV
Date: Tue, 26 Oct 2021 23:12:27 +0200

Tjernlund <tjernlund <at> tjernlund.se> writes:

>> Could you provide a more detailed recipe to reproduce this crash?  I was
>> unfortunately not able to figure out how to do it based on your original
>> bug report.
>
> Seems to be gone now, using emacs 27.2 these days.

Aha, ok!  Let's hope it has gone away.  If you see it again, please
report a new bug, and try to catch it in gdb with a full backtrace (type
"bt full" after it crashes).  But I'm closing this bug for now.

> I do se a "Warning: Missing charsets in String to FontSet conversion"
> when choosing Revert Buffer menu item.
> That happens every now and then so not specific to Revert Buffer.

I've never seen that message.  Maybe Eli knows what that could be?

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