Bug#763690: libgtk2.0-0: Many (all?) gtk2 applications segfault when using threads

Wed Oct 1 20:49:56 UTC 2014

Package: libgtk2.0-0
Version: 2.24.24-1
Severity: grave
Tags: patch
Justification: renders package unusable

Dear GTK2 Maintainers,
since I upgraded a couple of days ago libgtk2 packages I cannot use any
of the gtk2 applications I tried (for example: mirage, reportbug,
exaile).

These are the messages I get:

$ mirage
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `gtk-toolbar-icon-size' of type `GtkIconSize' from rc file value ""GTK_ICON_SIZE_SMALL_TOOLBAR"" of type `GtkIconSize'
/usr/lib/python2.7/dist-packages/mirage.py:608: Warning: The property GtkWindow:allow-shrink is deprecated and shouldn't be used anymore. It will be removed in a future version.
  self.window.set_property('allow-shrink', False)
Attempt to unlock mutex that was not locked
Aborted

$ reportbug
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `gtk-toolbar-icon-size' of type `GtkIconSize' from rc file value ""GTK_ICON_SIZE_SMALL_TOOLBAR"" of type `GtkIconSize'
Attempt to unlock mutex that was not locked
Aborted

$ exaile
INFO    : Loading Exaile 3.4.0 on Python 2.7.8...
INFO    : Loading settings...
INFO    : Using en_US UTF-8 locale
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `gtk-toolbar-icon-size' of type `GtkIconSize' from rc file value ""GTK_ICON_SIZE_SMALL_TOOLBAR"" of type `GtkIconSize'
INFO    : Loading plugins...
INFO    : Loading collection...
INFO    : Loading devices...
INFO    : Connected to udisks2
INFO    : Loading interface...
INFO    : Using GTK+ 2.24.24
INFO    : Loading main window...
INFO    : Connecting main window events...
INFO    : Loading panels...
INFO    : Connecting panel events...
INFO    : Done loading main window...
INFO    : Exaile is shutting down...
INFO    : Disabling plugins...
INFO    : Saving state...
INFO    : Bye!
Exception TypeError: "'NoneType' object is not callable" in  ignored
Exception TypeError: "'NoneType' object is not callable" in  ignored
Segmentation fault

I searched the internet and I found many links, like this for mirage in
fedora: https://bugzilla.redhat.com/show_bug.cgi?id=1123953 (but the
advice to comment out the gtk.gdk.threads_init() in mirage's code
doesn't seem a thorough solution, even if it "solves" the mirage
problem. 'Solves' as in 'mirage does not segfault').

I think I found the solution in this precise message in a reportbug bug
report, here in the BTS: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=758619#114
that has a patch for gdk.c in libgtk, in a function related to threads.

I'm not an expert packager, but I wanted to try to download the sources
and rebuild the packages after patching gdk.c, and I confirm that in my
system the above linked patch works. What I did was:

* apt-get source libgtk2.0-0
* apt-get build-dep libgtk2.0-0
* [Patch the file]
* dpkg-source --commit (but as I'm not an expert, I didn't manage to
  bump the version of "my" package)
* debuild -us -uc

And then I installed with dpkg the binary packages I already had in my
debian box.

After this procedure, the bugs of the three application I tried are
solved.

Kind regards,
Mark

P.S.: obviously right now I have installed the patched packages, but the
version numbers are the same as the official jessie ones because of me
not being able to somewhat bump them.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libgtk2.0-0 depends on:
ii  libatk1.0-0          2.12.0-1
ii  libc6                2.19-7
ii  libcairo2            1.12.16-5
ii  libcups2             1.7.5-1
ii  libfontconfig1       2.11.0-6.1
ii  libfreetype6         2.5.2-2
ii  libgdk-pixbuf2.0-0   2.30.8-1+b1
ii  libglib2.0-0         2.42.0-1
ii  libgtk2.0-common     2.24.24-1
ii  libpango-1.0-0       1.36.7-1
ii  libpangocairo-1.0-0  1.36.7-1
ii  libpangoft2-1.0-0    1.36.7-1
ii  libx11-6             2:1.6.2-3
ii  libxcomposite1       1:0.4.4-1
ii  libxcursor1          1:1.1.14-1
ii  libxdamage1          1:1.1.4-2
ii  libxext6             2:1.3.2-1
ii  libxfixes3           1:5.0.1-2
ii  libxi6               2:1.7.4-1
ii  libxinerama1         2:1.1.3-1
ii  libxrandr2           2:1.4.2-1
ii  libxrender1          1:0.9.8-1
ii  multiarch-support    2.19-7
ii  shared-mime-info     1.3-1

Versions of packages libgtk2.0-0 recommends:
ii  hicolor-icon-theme  0.13-1
ii  libgtk2.0-bin       2.24.24-1

Versions of packages libgtk2.0-0 suggests:
ii  gvfs             1.20.3-1
ii  librsvg2-common  2.40.4-1

-- no debconf information

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