Gtk:ERROR when trying to start

[phw]

Starting the latest AppImageUpdate-x86_64.AppImage results in:

$ ./AppImageUpdate-x86_64.AppImage                          
AppImageUpdate version 1-alpha (commit ea07e03), build 429 built on 2020-03-04 14:06:40 UTC

(AppRun.wrapped:108381): Gtk-WARNING **: 14:26:59.210: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../gtk/gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/16x16/status/image-missing.png: Schwerer Fehler beim Lesen einer PNG-Bilddatei: bad parameters to zlib (gdk-pixbuf-error-quark, 0)
Bail out! Gtk:ERROR:../gtk/gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/16x16/status/image-missing.png: Schwerer Fehler beim Lesen einer PNG-Bilddatei: bad parameters to zlib (gdk-pixbuf-error-quark, 0)
zsh: abort (core dumped)  ./AppImageUpdate-x86_64.AppImage

Arch Linux with GNOME 3.36. The icon /usr/share/icons/Adwaita/16x16/status/image-missing.png exists.

[probonopd]

What happens if you do:

./AppImageUpdate-x86_64.AppImage --appimage-extract
rm squashfs-root/usr/plugins/platformthemes/*
./squashfs-root/AppRun

If this still doesn't work, what happens if you comment out the export QT_QPA_PLATFORMTHEME=gtk3 in squashfs-root/apprun-hooks/linuxdeploy-plugin-qt-hook.sh?

If this still doesn't work, what happens if you use https://github.com/antony-jr/AppImageUpdater/releases/tag/continuous?

[phw]

Removing squashfs-root/usr/plugins/platformthemes/* works. Only uncommenting export QT_QPA_PLATFORMTHEME=gtk3 has no effect.

I had previously a version that was working, it identifies as:

AppImageUpdate version 1-alpha (commit e17e350), build 422 built on 2019-10-13 13:17:11 UTC

The version crashing is:

AppImageUpdate version 1-alpha (commit ea07e03), build 429 built on 2020-03-04 14:06:40 UTC

The one from https://github.com/antony-jr/AppImageUpdater/releases/tag/continuous works, but that's a different tool, right?

[nlordell]

Might be related to this https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1838891

I just managed to reproduce the crash locally. Just before the crash, the following lines are printed to stderr:

(AppImageLauncherSettings:27871): Gtk-WARNING **: 21:45:01.935: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/16x16/status/image-missing.png: Fatal error reading PNG image > file: bad parameters to zlib (gdk-pixbuf-error-quark, 0)

I think most important part here is “bad parameters to zlib”. AppImageLauncher uses its own static zlib (lib/AppImageUpdate/lib/zsync2/lib/zlib/libzsync2_libz.a) which is incompatible with public zlib (/lib/x86_64-linux-gnu/libz.so.1) that GTK was compiled against.

Recompiling AppImageLauncher with system zlib should help, but I haven’t found a way to do that. I suggest you to ask AppImageLauncher developer about that.

Attaching a stacktrace for future reference.

PS: I see the exact same error on Fedora 31 (with GNOME 3.34).

[probonopd]

@TheAssassin given the above I think it would be a good idea not to ship platformthemes for now, wdyt?

[TheAssassin]

You were the one to urge for including this platform theme stuff. It's not really documented, IIRC it was some random git repo you found, right?

We don't use the upstream Ubuntu binaries IIRC, but use Stephan Binner's PPA. Perhaps you should contact him and ask about the issues?

[probonopd]

What is libzsync2_libz and why is it needed? Could it be conflicting the normal libz?

[mfilipe]

Fedora 31

AppImageUpdate version 1-alpha (commit cb611d8), build 431 built on 2020-04-07 21:47:19 UTC
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
 
(AppRun.wrapped:16448): Gtk-WARNING **: 22:45:35.230: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/16x16/status/image-missing.png: Fatal error reading PNG image file: bad parameters to zlib (gdk-pixbuf-error-quark, 0)
Bail out! Gtk:ERROR:gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/Adwaita/16x16/status/image-missing.png: Fatal error reading PNG image file: bad parameters to zlib (gdk-pixbuf-error-quark, 0)

[vasyugan]

I should say that I see the same on Debian Buster with MATE.

[probonopd]

Duplicate of #150, workaround in #150 (comment).

[probonopd]

Please retry with https://github.com/AppImage/AppImageUpdate/releases/tag/continuous.