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[Bug 1748787] Re: pitivi crashed with AttributeError in _create_next_thumb(): 'NoneType' object has no attribute 'seek'

To: ubuntustudio-bugs@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1748787@xxxxxxxxxxxxxxxxxx>
Date: Wed, 29 Aug 2018 09:39:38 -0000
Reply-to: Bug 1748787 <1748787@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: pitivi (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1748787

Title:
  pitivi crashed with AttributeError in _create_next_thumb(): 'NoneType'
  object has no attribute 'seek'

Status in PiTiVi:
  New
Status in pitivi package in Ubuntu:
  Confirmed

Bug description:
  A crash occurred that I was configuring rendering, but the program
  kept working.

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: pitivi 0.99-2
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.8-0ubuntu8
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Feb 11 18:52:39 2018
  ExecutablePath: /usr/bin/pitivi
  InstallationDate: Installed on 2017-11-12 (91 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171109)
  InterpreterPath: /usr/bin/python3.6
  ProcCmdline: /usr/bin/python3 /usr/bin/pitivi
  Python3Details: /usr/bin/python3.6, Python 3.6.4, python3-minimal, 3.6.4-1
  PythonArgs: ['/usr/bin/pitivi']
  PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
  SourcePackage: pitivi
  Title: pitivi crashed with AttributeError in _create_next_thumb(): 'NoneType' object has no attribute 'seek'
  Traceback:
   Traceback (most recent call last):
     File "/usr/lib/x86_64-linux-gnu/pitivi/python/pitivi/timeline/previewers.py", line 556, in _create_next_thumb
       self.pipeline.seek(1.0,
   AttributeError: 'NoneType' object has no attribute 'seek'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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