Can't reproduce it. Run dmesg after that and check the last lines of the output for the hints about the cause of segfault. If it says something about libgtk-3.so then you've probably been hit by a known bug in gtk3-engines-unico [1] and need to change your GTK+ theme to something not using unico.
If not, posting the relevant lines here won't hurt anyway. [1] http://bugs.debian.org/706330
