Please describe the problem:
Running the following sample script leads to a segmentation fault:

#! /usr/bin/env python
import pango
import gtk.gdk
print "1"
p = gtk.gdk.Pixmap(None,768,512,24)
print "2"
gc = p.new_gc()
print "3"
pl = pango.Layout(pango.Context())
print "4"
pl.set_text("H E L L O")
print "5"
p.draw_layout(gc,10,10,pl)
print "6"


Steps to reproduce:
1. Run above script

Actual results:
torsten@pulsar:~$ python test.py
1
2
3
4
5

(test.py:9824): Pango-CRITICAL **: pango_font_map_load_fontset: assertion
`fontmap != NULL' failed

(test.py:9824): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion
`G_IS_OBJECT (object)' failed

(test.py:9824): GLib-GObject-CRITICAL **: g_object_set_qdata_full: assertion
`G_IS_OBJECT (object)' failed

(test.py:9824): Pango-CRITICAL **: pango_font_map_get_shape_engine_type:
assertion `PANGO_IS_FONT_MAP (fontmap)' failed

(test.py:9824): GLib-CRITICAL **: g_quark_from_string: assertion `string !=
NULL' failed
Segmentation fault


Expected results:
pango.Context() should throw an exception because pango.Context is abstract.

Does this happen every time?
Yes

Other information:
see http://bugs.debian.org/317105