bug#47284: emacs 26/27 SEGV

[Tjernlund]

Any progress ?

 Jocke

On Thu, 2021-04-08 at 13:52 +0200, Tjernlund wrote:
> On Sat, 2021-04-03 at 19:14 -0500, Stefan Kangas wrote:
> Tjernlund <tjernlund@tjernlund.se> writes:
> 
> > File / Revert Buffer in the menu bar over a remote display with ping > 3 ms 
> > gives me a SEGV:
> 
> What version of Emacs is this?  Could you please include the details
> 
> 26, 27 and 27.2. All I have tested.
> 
> from `report-emacs-bug'?
> 
> yes, here goes:
> In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 
> 1.16.0)
>  of 2021-02-13 built on localhost
> Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
> System Description: Gentoo/Linux
> 
> Recent messages:
> For information about GNU Emacs and the GNU system, type C-h C-a.
> tst.s has auto save data; consider M-x recover-this-file
> Making completion list... [2 times]
> 
> Configured using:
>  'configure --prefix=/usr --build=x86_64-pc-linux-gnu
>  --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
>  --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
>  --localstatedir=/var/lib --disable-silent-rules
>  --docdir=/usr/share/doc/emacs-27.1-r4
>  --htmldir=/usr/share/doc/emacs-27.1-r4/html --libdir=/usr/lib64
>  --program-suffix=-emacs-27 --includedir=/usr/include/emacs-27
>  --infodir=/usr/share/info/emacs-27 --localstatedir=/var
>  --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
>  --without-compress-install --without-hesiod --without-pop
>  --with-file-notification=inotify --with-pdumper --enable-acl
>  --with-dbus --without-modules --without-gameuser --with-libgmp
>  --with-gpm --with-json --with-kerberos --with-kerberos5 --with-lcms2
>  --without-xml2 --without-mailutils --without-selinux --with-gnutls
>  --without-libsystemd --with-threads --without-wide-int --with-zlib
>  --with-sound=alsa --with-x --without-ns --without-gconf
>  --with-gsettings --without-toolkit-scroll-bars --with-gif --with-jpeg
>  --with-png --with-rsvg --with-tiff --with-xpm --without-imagemagick
>  --with-xft --with-cairo --with-harfbuzz --without-libotf
>  --without-m17n-flt --with-x-toolkit=lucid --with-xaw3d
>  --with-dumping=pdumper 'CFLAGS=-O2 -pipe -Wno-deprecated-declarations
>  -Wno-error' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''
> 
> Configured features:
> XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB
> NOTIFY INOTIFY ACL GNUTLS FREETYPE HARFBUZZ ZLIB LUCID X11 XDBE XIM
> THREADS JSON PDUMPER LCMS2 GMP
> 
> Important settings:
>   value of $LANG: en_GB.UTF-8
>   locale-coding-system: utf-8-unix
> 
> Major mode: Assembler
> 
> Minor modes in effect:
>   tooltip-mode: t
>   global-eldoc-mode: t
>   electric-indent-mode: t
>   mouse-wheel-mode: t
>   tool-bar-mode: t
>   menu-bar-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   blink-cursor-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
> 
> Load-path shadows:
> None found.
> 
> Features:
> (shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
> format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
> epg-config gnus-util rmail rmail-loaddefs text-property-search time-date
> subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies
> mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs
> cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
> asm-mode tooltip eldoc electric uniquify ediff-hook vc-hooks
> lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
> dnd fontset image regexp-opt fringe tabulated-list replace newcomment
> text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar
> rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
> syntax facemenu font-core term/tty-colors frame minibuffer cl-generic
> cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
> korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
> european ethiopic indian cyrillic chinese composite charscript charprop
> case-table epa-hook jka-cmpr-hook help simple abbrev obarray
> cl-preloaded nadvice loaddefs button faces cus-face macroexp files
> text-properties overlay sha1 md5 base64 format env code-pages mule
> custom widget hashtable-print-readable backquote threads dbusbind
> inotify lcms2 dynamic-setting system-font-setting font-render-setting
> cairo x-toolkit x multi-tty make-network-process emacs)
> 
> Memory information:
> ((conses 16 46383 8687)
>  (symbols 48 6010 1)
>  (strings 32 16243 1799)
>  (string-bytes 1 515461)
>  (vectors 16 10106)
>  (vector-slots 8 130705 10640)
>  (floats 8 22 43)
>  (intervals 56 404 0)
>  (buffers 1000 13))
> 
> 
> Do you have a recipe to reproduce this, starting from "emacs -Q"?
> 
> ssh to remote machine(with X11 DISPLAY preserved back to original machine) 
> over vpn link
>  with ping >= 3 ms
> emacs -Q tst.txt
> change something, then do File/Revert Buffer
> SEGV
> 
> 
> > (gdb) bt
> > #0  0x00007ffff7ddc594 in GetnormalGC (lw=lw@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@entry=0x7fffffffb710,
> > new_widget=new_widget@entry=0x555556999670, args=args@entry=0x7fffffffbb80,
> > num_args=<optimized out>, num_args@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@entry=0x7ffff7e06065 "label", class=class@entry=0x0,
> > widget_class=widget_class@entry=0x7ffff7e19280 <labelClassRec>,
> > parent=parent@entry=0x555556999440, default_screen=0x555555e21bf0,
> > args=args@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@entry=0x7ffff7e06065 "label",
> > widget_class=widget_class@entry=0x7ffff7e19280 <labelClassRec>,
> > parent=parent@entry=0x555556999440, args=args@entry=0x7fffffffbb80,
> > num_args=0x4, typed_args=typed_args@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@entry=0x7ffff7e06065 "label", widget_class=0x7ffff7e19280
> > <labelClassRec>, parent=parent@entry=0x555556999440,
> > args=args@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@entry=0x7fffffffbda0,
> > new_widget=new_widget@entry=0x555556999440, args=args@entry=0x7fffffffc2b0,
> > num_args=<optimized out>, num_args@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@entry=0x5555568f4b50 "Q2BR1", class=class@entry=0x0,
> > widget_class=widget_class@entry=0x7ffff7e18ac0 <dialogClassRec>,
> > parent=parent@entry=0x55555692ab30, default_screen=0x555555e21bf0,
> > args=args@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@entry=0x5555568f4b50 "Q2BR1",
> > widget_class=widget_class@entry=0x7ffff7e18ac0 <dialogClassRec>,
> > parent=parent@entry=0x55555692ab30, args=args@entry=0x7fffffffc2b0,
> > num_args=0x0, typed_args=typed_args@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@entry=0x5555568f4b50 "Q2BR1", widget_class=0x7ffff7e18ac0
> > <dialogClassRec>, parent=parent@entry=0x55555692ab30,
> > args=args@entry=0x7fffffffc2b0, num_args=num_args@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@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@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@entry=0x2, 
> > args=args@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@entry=0x3, 
> > args=args@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@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@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@entry=0x55555567e330 <command_loop_1>, 
> > handlers=handlers@entry=0x90, hfun=hfun@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@entry=0x0) at 
> > lisp.h:1027
> > #36 0x00005555556e5a61 in internal_catch (tag=tag@entry=0xd3e0, 
> > func=func@entry=0x55555566fef0 <command_loop_2>, 
> > arg=arg@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
>