[Bug 709205] [pitivi] Segfault when ungrouping clips that have effects

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=709205
  GStreamer | gst-editing-services | 1.1.90

--- Comment #1 from Mathieu Duponchelle <mathieu.duponchelle at epitech.eu> 2013-10-01 17:03:12 UTC ---
Created an attachment (id=256203)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=256203)
Stacktrace

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