Hello there!
Today i've found this on a Linux Mint 19 with pip installation. It's weird, on a Linux Mint 18.3 i didn't happend, ¿maybe gtk bugged version at system wide?.
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/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:57: GtkWarning: could not open display
warnings.warn(str(e), _gtk.Warning)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:26: Warning: invalid (NULL) pointer instance
activity_window = gtk.Window()
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:26: Warning: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
activity_window = gtk.Window()
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:31: GtkWarning: IA__gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
sw = gtk.ScrolledWindow()
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: GtkWarning: IA__gdk_pango_context_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: PangoWarning: pango_context_set_font_description: assertion 'context != NULL' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: PangoWarning: pango_context_set_base_dir: assertion 'context != NULL' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: PangoWarning: pango_context_set_language: assertion 'context != NULL' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: Warning: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: GtkWarning: IA__gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: GtkWarning: IA__gdk_screen_get_display: assertion 'GDK_IS_SCREEN (screen)' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: GtkWarning: IA__gdk_keymap_get_for_display: assertion 'GDK_IS_DISPLAY (display)' failed
sw.add(activity)
/home/administrador/.local/lib/python2.7/site-packages/tryton/gui/window/activity.py:36: Warning: g_object_get: assertion 'G_IS_OBJECT (object)' failed
sw.add(activity)
Violación de segmento (`core' generado)
Best regards.
Leandro