Distribution/Version: Debian unstable/experimental

Here's the original "upstream submission" which should have come to the BTS:

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Debian got a bug report (http://bugs.debian.org/317105) about the
following script segfaulting: 

#! /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"


Obviously the script is buggy in that it uses pango.Context() which
can't work as that class is abstract. But it should fail with an
exception at that point instead of segfaulting. 

I wanted to create a path for that already but I wonder how you do that
with other classes a user is not allowed to create manually... It seems 
like you are using G_TYPE_IS_ABSTRACT to find out in pyg_object_new so
this might be a bug in Pango than?

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I've reproduced the bug with pygtk 2.6 and 2.8.