python3.3 crashed with SIGSEGV in PyUnicode_FromFormatV()

[Robert Bruce Park]

Was attempting to transcode a video with Transmageddon, latest saucy packages.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: python3.3-minimal 3.3.2-3ubuntu1
ProcVersionSignature: Ubuntu 3.10.0-3.12-generic 3.10.1
Uname: Linux 3.10.0-3-generic x86_64
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
Date: Sat Jul 27 13:53:49 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/python3.3
InstallationDate: Installed on 2012-09-14 (315 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120905.2)
MarkForUpload: True
ProcCmdline: python3 transmageddon.py
SegvAnalysis:
 Segfault happened at: 0x7f0fade7a930: add %eax,(%rax)
 PC (0x7f0fade7a930) in non-executable VMA region: 0x7f0fade57000-0x7f0fade97000 rw-p None
 source "%eax" ok
 destination "(%rax)" (0x7f0fadf93f20) ok
SegvReason: executing writable VMA None
Signal: 11
SourcePackage: python3.3
StacktraceTop:
 ?? ()
 PyUnicode_FromFormatV ()
 PyErr_Format ()
 _PyObject_GenericGetAttrWithDict ()
 ?? ()
Title: python3.3 crashed with SIGSEGV in PyUnicode_FromFormatV()
UpgradeStatus: Upgraded to saucy on 2013-05-08 (80 days ago)
UserGroups: adm autopilot cdrom debian-tor dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 PyUnicode_FromFormatV (format=<optimized out>, format@entry=0x601b90 "'%.50s' object has no attribute '%U'", vargs=vargs@entry=0x7fff6ce6c7e0) at ../Objects/unicodeobject.c:2822
 PyErr_Format (exception=0x98bb00 <_PyExc_AttributeError.67928>, format=format@entry=0x601b90 "'%.50s' object has no attribute '%U'") at ../Python/errors.c:697
 _PyObject_GenericGetAttrWithDict (obj=0x7f0fabe7d500, name=0x7f0fabe8a6f0, dict=<optimized out>) at ../Objects/object.c:1139
 slot_tp_getattr_hook.6699 (self=0x7f0fabe7d500, name=0x7f0fabe8a6f0) at ../Objects/typeobject.c:5435