GTK segfault with GTK3 and mpl_toolkits by mdboom · Pull Request #1813 · matplotlib/matplotlib · GitHub
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GTK segfault with GTK3 and mpl_toolkits - #1813

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May 28, 2013
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GTK segfault with GTK3 and mpl_toolkits#1813
mdboom merged 2 commits into
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mdboom:gtk3-version-check

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@mdboom mdboom commented May 20, 2013

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Something goes wrong when using a GTK3 backend and the mpl_toolkits. See this very minimal testcase:

>>> from gi.repository import Gtk
>>> import mpl_toolkits.axisartist
/usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
  import gobject._gobject
/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: specified class size for type `PyGtkGenericCellRenderer' is smaller than the parent type's `GtkCellRenderer' class size
  from gtk import _gtk
/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed
  from gtk import _gtk
Segmentatiefout (geheugendump gemaakt)

Most likely, something imports the old GTK2 bindings, run following for the same error:

>>> from gi.repository import Gtk
>>> import gtk

Grepping the sourcecode gives mpl_toolkits/gtktools.py where it is used, but I can't even find where it is imported.

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mdboom commented May 20, 2013

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efiring
efiring reviewed May 25, 2013
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Comment thread lib/matplotlib/backends/backend_gtk3.py Outdated

@efiring efiring May 25, 2013

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Missing word: "requires".
Also, this has me puzzled, because I can run the gtk3agg backend on ubuntu Precise, but I don't have the libgtk-3-dev package installed.

@mdboom mdboom May 28, 2013

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It seems things are packaged somewhat differently on Debian/Ubuntu than on Fedora. I think on Ubuntu, the required package is: gir1.2-gtk3.0 https://launchpad.net/ubuntu/precise/+package/gir1.2-gtk-3.0

Since we don't really know what distro the user will be using, I'm inclined to change this to:

"The Gtk3 backend requires that the GObject introspection bindings for Gtk 3 are installed."

That should give a user enough to Google something by.

mdboom added a commit that referenced this pull request May 28, 2013
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Merge pull request #1813 from mdboom/gtk3-version-check
dd38945 
GTK segfault with GTK3 and mpl_toolkits
@mdboom
mdboom merged commit dd38945 into matplotlib:master May 28, 2013
mdboom added a commit that referenced this pull request May 28, 2013
@mdboom
Merge pull request #1813 from mdboom/gtk3-version-check
130b6fc 
GTK segfault with GTK3 and mpl_toolkits
@mdboom
mdboom deleted the gtk3-version-check branch August 7, 2014 13:54
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