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[Rolf Leggewie <588694@xxxxxxxxxxxxxxxxxx>]

lucid has seen the end of its life and is no longer receiving any
updates. Marking the lucid task for this ticket as "Won't Fix".

** Changed in: pygobject (Ubuntu Lucid)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/588694

Title:
  null-ok parameter annotation not correctly handled for virtual methods

Status in Python bindings for GObject:
  Fix Released
Status in pygobject package in Ubuntu:
  Fix Released
Status in pygobject source package in Lucid:
  Won't Fix

Bug description:
  Steps to reproduce:
  1. Create a Python class which implement an interface which contains a method
  with null-ok string parameter (gtk.Buildable.add_child)
  2. Call this method from C with a null parameter (or use gtk.Builder in our
  case)
  3. application crashes with a segfault in the corresponding proxy method.

  
  Test case:
  1. Use upstream head Rhythmbox, or lucid Rhythmbox with patch from https://bugzilla.gnome.org/show_bug.cgi?id=619677, so that impl_add_uri and impl_want_uri RB functions are exposed to RB Python plugins
  2. Add a trivial Python plugin that implements do_impl_{want,add}_uri
  3. Run "rhythmbox testurl:///whatever" from the command line
  4. Rhythmbox segfaults.

  
  Code for example trivial Python plugin:

  
  import rb, gobject
  class ExampleURI(rb.Plugin):
      def activate(self, shell):
          self.source = gobject.new(MySource, shell=shell,plugin=self)
      def deactivate(self, shell):
          self.source.delete_thyself()
  class MySource(rb.Source):
      __gproperties__ = {
        'plugin': (rb.Plugin, 'plugin', 'plugin', 
                      gobject.PARAM_WRITABLE|gobject.PARAM_CONSTRUCT_ONLY),
      }
      def do_impl_want_uri(self, uri):
          if uri.startswith("testuri://"): return 100
          rb.Source.do_impl_want_uri(self, uri)
          return 0
      def do_impl_add_uri(self, uri, title, genre):
          if not uri.startswith("testuri://"): return False
          print "Hi! The testcase plugin got a uri: %s" % uri
          return True

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