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#1 2024-03-27 14:49:19

syngres
Member
Registered: 2013-10-19
Posts: 3

Emacs 29 and xwidget-webkit

Hallo Arch linux community,

I'm trying to compile Emacs with xwidget-webkit support but having some difficulties. Usually I clone the Emacs repository, checkout a certain branch/tag and do: 

$ ./configure -C --prefix=$HOME/.local/opt/emacs --with-cairo --with-json --with-xwidgets --with-mailutils --with-tree-sitter --with-native-compilation --with-imagemagick --with-gif --with-jpeg --with-png --with-xml2 --with-tiff --with-x-toolkit=yes --with-libsystemd --with-modules
...
$ make -j4
...
$ make install

When I start emacs:

$ ~/.local/opt/emacs/bin/emacs -Q

And call xwidget-webkit-browse-url I get a segmentation fault: 

acktrace:                                                                                                                                                           
/home/victor/.local/opt/emacs/bin/emacs(emacs_backtrace+0x4e)[0x624df3e89b4e]                                                                                        
/home/victor/.local/opt/emacs/bin/emacs(terminate_due_to_signal+0x82)[0x624df3d2ffca]                                                                                
/home/victor/.local/opt/emacs/bin/emacs(+0x90590)[0x624df3d30590] 
/home/victor/.local/opt/emacs/bin/emacs(+0x185336)[0x624df3e25336]    
/home/victor/.local/opt/emacs/bin/emacs(+0x1858b1)[0x624df3e258b1]    
/home/victor/.local/opt/emacs/bin/emacs(+0x185abb)[0x624df3e25abb]
/usr/lib/libX11.so.6(_XError+0x11c)[0x71380144274c]                        
/usr/lib/libX11.so.6(+0x44858)[0x713801442858]                                                                                                                       
/usr/lib/libX11.so.6(+0x44915)[0x713801442915]                                                                                                                       
/usr/lib/libX11.so.6(_XEventsQueued+0x5a)[0x7138014429aa]                  
/usr/lib/libX11.so.6(XPending+0x58)[0x7138014352c8]                                                                                                                  
/usr/lib/libgdk-3.so.0(+0x88128)[0x713802495128]                           
/usr/lib/libglib-2.0.so.0(+0x5a68b)[0x7138015c468b]                                                                                                                  
/usr/lib/libglib-2.0.so.0(+0xb918f)[0x71380162318f]                                                                                                                  
/usr/lib/libglib-2.0.so.0(g_main_context_pending+0x2d)[0x7138015c36ad]                                                                                               
/usr/lib/libgtk-3.so.0(gtk_events_pending+0x13)[0x713801ded333]                                                                                                      
/home/victor/.local/opt/emacs/bin/emacs(+0x185723)[0x624df3e25723]                                                                                                   
/home/victor/.local/opt/emacs/bin/emacs(gobble_input+0x101)[0x624df3e6fef1]  
/home/victor/.local/opt/emacs/bin/emacs(process_pending_signals+0x15)[0x624df3e702c5]                                                                                
/home/victor/.local/opt/emacs/bin/emacs(probably_quit+0x3d)[0x624df3ef948d]                                                                                          
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0x23)[0x624df3ef9643]                                                                                               
/home/victor/.local/opt/emacs/bin/emacs(+0x28428a)[0x624df3f2428a]                                                                                                   
/home/victor/.local/opt/emacs/bin/emacs(map_obarray+0xc3)[0x624df3f2e7f3]                                                                                            
/home/victor/.local/opt/emacs/bin/emacs(Fmapatoms+0x51)[0x624df3f2e871]           
/home/victor/.local/opt/emacs/bin/../lib/emacs/29.3/native-lisp/29.3-f9dfd786/preloaded/simple-fab5b0cf-9ff4140c.eln(F657865637574652d657874656e6465642d636f6d6d616e6
42d2d73686f72746572_execute_extended_command__shorter_0+0x98)[0x7137e9b6da98]                                                                                        
/home/victor/.local/opt/emacs/bin/emacs(exec_byte_code+0x410)[0x624df3f44030]     
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]                                                                                               
/home/victor/.local/opt/emacs/bin/emacs(Fapply+0x2b8)[0x624df3ef9ae8]                                                                                                
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]                                                                                               
/home/victor/.local/opt/emacs/bin/../lib/emacs/29.3/native-lisp/29.3-f9dfd786/preloaded/timer-3ee7cfd9-226b3dc9.eln(F74696d65722d6576656e742d68616e646c6572_timer_eve
nt_handler_0+0x427)[0x7137e81bd607]                                                                                                                                  
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]            
/home/victor/.local/opt/emacs/bin/emacs(timer_check+0x311)[0x624df3e711b1]                                                                                           
/home/victor/.local/opt/emacs/bin/emacs(+0x1d1535)[0x624df3e71535]                                                                                                   
/home/victor/.local/opt/emacs/bin/emacs(+0x1d1738)[0x624df3e71738]                                                                                                   
/home/victor/.local/opt/emacs/bin/emacs(read_char+0xdaf)[0x624df3e7749f]                                                                                             
/home/victor/.local/opt/emacs/bin/emacs(+0x1d9e95)[0x624df3e79e95]
/home/victor/.local/opt/emacs/bin/emacs(+0x1dbd85)[0x624df3e7bd85]
/home/victor/.local/opt/emacs/bin/emacs(internal_condition_case+0x67)[0x624df3ef7da7]
/home/victor/.local/opt/emacs/bin/emacs(command_loop_2+0x26)[0x624df3e671b6]
/home/victor/.local/opt/emacs/bin/emacs(internal_catch+0x41)[0x624df3ef7d01]
/home/victor/.local/opt/emacs/bin/../lib/emacs/29.3/native-lisp/29.3-f9dfd786/preloaded/simple-fab5b0cf-9ff4140c.eln(F657865637574652d657874656e6465642d636f6d6d616e642d2d73686f72746572_execute_extended_command__shorter_0+0x98)[0x7137e9b6da98]
/home/victor/.local/opt/emacs/bin/emacs(exec_byte_code+0x410)[0x624df3f44030]
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]
/home/victor/.local/opt/emacs/bin/emacs(Fapply+0x2b8)[0x624df3ef9ae8]
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]
/home/victor/.local/opt/emacs/bin/../lib/emacs/29.3/native-lisp/29.3-f9dfd786/preloaded/timer-3ee7cfd9-226b3dc9.eln(F74696d65722d6576656e742d68616e646c6572_timer_event_handler_0+0x427)[0x7137e81bd607]
/home/victor/.local/opt/emacs/bin/emacs(Ffuncall+0xf6)[0x624df3ef9716]
/home/victor/.local/opt/emacs/bin/emacs(timer_check+0x311)[0x624df3e711b1]
/home/victor/.local/opt/emacs/bin/emacs(+0x1d1535)[0x624df3e71535]
/home/victor/.local/opt/emacs/bin/emacs(+0x1d1738)[0x624df3e71738]
/home/victor/.local/opt/emacs/bin/emacs(read_char+0xdaf)[0x624df3e7749f]
/home/victor/.local/opt/emacs/bin/emacs(+0x1d9e95)[0x624df3e79e95]
/home/victor/.local/opt/emacs/bin/emacs(+0x1dbd85)[0x624df3e7bd85]
/home/victor/.local/opt/emacs/bin/emacs(internal_condition_case+0x67)[0x624df3ef7da7]
/home/victor/.local/opt/emacs/bin/emacs(command_loop_2+0x26)[0x624df3e671b6]
/home/victor/.local/opt/emacs/bin/emacs(internal_catch+0x41)[0x624df3ef7d01]
/home/victor/.local/opt/emacs/bin/emacs(+0x1c7151)[0x624df3e67151]
...
[1]    387967 IOT instruction (core dumped)  ~/.local/opt/emacs/bin/emacs -Q

As I've found out here (https://www.reddit.com/r/emacs/comments … _sessions/) it has to do with webkit2gtk:

╰─➤  sudo pacman -Qi webkit2gtk                                                                                                                                134 ↵
[sudo] password for victor: 
Name            : webkit2gtk
Version         : 2.44.0-1
Description     : Web content engine for GTK
Architecture    : x86_64
URL             : https://webkitgtk.org
Licenses        : custom
Groups          : None
Provides        : libjavascriptcoregtk-4.0.so=18-64  libwebkit2gtk-4.0.so=37-64
Depends On      : at-spi2-core  atk  bubblewrap  cairo  enchant  fontconfig  freetype2  glib2  gst-plugins-bad-libs  gst-plugins-base-libs  gstreamer  gtk3
                  harfbuzz  harfbuzz-icu  hyphen  icu  libavif  libdrm  libegl  libepoxy  libgcrypt  libgl  libgles  libjpeg  libjxl  libmanette  libpng  libseccomp
                  libsecret  libsoup  libsystemd  libtasn1  libwebp  libwpe  libx11  libxcomposite  libxml2  libxslt  libxt  mesa  openjpeg2  sqlite  wayland  woff2
                  wpebackend-fdo  xdg-dbus-proxy  zlib  libWPEBackend-fdo-1.0.so  libwpe-1.0.so
Optional Deps   : geoclue: Geolocation support [installed]
                  gst-libav: nonfree media decoding
                  gst-plugins-bad: media decoding [installed]
                  gst-plugins-good: media decoding [installed]
Required By     : None
Optional For    : wxwidgets-gtk3
Conflicts With  : None
Replaces        : None
Installed Size  : 106.07 MiB
Packager        : Jan Alexander Steffens (heftig) <heftig@archlinux.org>
Build Date      : Sat 16 Mar 2024 05:09:24 PM CET
Install Date    : Wed 27 Mar 2024 01:23:02 PM CET
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : Signature

Any ideas? Downgrading webkit2gtk (as mentioned in the reddit thread) lead to some more strange compilation problems.
Any help here would be appreciated.

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#2 2024-03-27 15:18:46

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 30,456
Website

Re: Emacs 29 and xwidget-webkit

The reddit thread is clear - and the emacs bug report more so: those versions are incompatible.  Emacs is using a feature of webkit that newer versions of webkit does not provide.  Either webkit needs to add this back (unlikely) or emacs needs to switch to using wpe (which they really should have been using anyways).

In the mean time, you'd need to use an older version of webkit for this to work.

"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

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#3 2024-03-28 13:44:57

syngres
Member
Registered: 2013-10-19
Posts: 3

Re: Emacs 29 and xwidget-webkit

Trilby wrote:

In the mean time, you'd need to use an older version of webkit for this to work.

Well, that's why I'm here. I hoped someone has figured out which combination of Emacs and webkit2gtk works because in my case downgrading webkit2gtk cause compilation errors.

Fun fact: While I was reading through this thread (https://lists.gnu.org/archive/html/bug- … 00651.html) I saw this CLI arguments: 

-xrm "emacs.synchronous: true"

When I run Emacs (with xwidget-webkit support enabled) like this: 

~/.local/opt/emacs/bin/emacs --init-directory ~/.config/emacs -xrm "emacs.synchronous: true"

xwidget-webkit works! I mainly use it in combination with elfeed while going thourgh my RSS/Atom feeds. I hope this might be helpful for other Emacsers.

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#4 2024-03-28 19:27:55

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 30,456
Website

Re: Emacs 29 and xwidget-webkit

syngres wrote:

I hoped someone has figured out which combination of Emacs and webkit2gtk works

The redit thread and emacs bug report are quite clear about this already - there's nothing there to "figure out."

syngres wrote:

downgrading webkit2gtk cause compilation errors.

And if you want help with those errors you'd need to actually tell us something about them: https://bbs.archlinux.org/viewtopic.php?id=57855

Based on the emacs bug report, the current version of webkit is not even expected to work - so there is nothing to solve.  But previous versions are expected to work ... and any errors you get trying to build emacs against and older webkit may be solvable.  But no error is solvable until it is actually described.

syngres wrote:

When I run Emacs (with xwidget-webkit support enabled) like this... xwidget-webkit works!

Great.  Does that workaround satisfy your needs?  If so, please mark the thread as solved.  If not, we need to learn about the "compilation errors."

"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

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#5 2024-04-19 02:53:16

ilemming
Member
Registered: 2024-04-19
Posts: 1

Re: Emacs 29 and xwidget-webkit

Does anyone know exact steps to fix this? I tried downgrading to webkit2gtk-2.40.5-2-x86_64.pkg.tar.zst but then when I rebuild Emacs from source, and then run `ldd $(which emacs) | grep webkit`, which supposedly should bind to 4.0 of libewebkit2gtk, but it still loads the newer one. Trying to run xwidget-webkit-browse-url in Emacs doesn't crash it, yet doesn't display anything - only blank buffer.

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#6 2024-04-19 07:13:59

seth
Member
From: Don't DM me only for attention
Registered: 2012-09-03
Posts: 73,883

Re: Emacs 29 and xwidget-webkit

I tried downgrading to webkit2gtk-2.40.5-2-x86_64.pkg.tar.zst

What does that mean, specifically the "tried" part.

which supposedly should bind to 4.0 of libewebkit2gtk, but it still loads the newer one

Please don't paraphrase, https://bbs.archlinux.org/viewtopic.php?id=57855

Don't downgrade the system webkit2gtk, fetch a compatible one, put it somewhere and LD_PRELOAD it for emacs.
Or use vim tongue

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