[Pidgin] #17401: asan heap-use-after-free in purple_media_manager_unregister_gst_device()

[Pidgin]

#17401: asan heap-use-after-free in purple_media_manager_unregister_gst_device()
--------------------+---------------------------
 Reporter:  bellet  |       Owner:  EionRobb
     Type:  defect  |      Status:  new
Milestone:          |   Component:  unclassified
  Version:  2.13.0  |  Resolution:
 Keywords:          |
--------------------+---------------------------

Comment (by bellet):

 The patch fails the captcha test, so it can be downloaded here
 [https://bellet.info/pidgin/1001-mediamanager-fix-an-heap-use-after-free-
 spotted-by-asan.patch]

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Ticket URL: <https://developer.pidgin.im/ticket/17401#comment:1>
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