mumble crashed with SIGSEGV in _int_malloc()

[Vadim Peretokin]

Crashed when I was trying to get it to use the USB headset - it kept using internal microphone for input, even though the audio tab was changed from default to headset.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: mumble 1.2.3-2ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-16.27-generic 3.0.17
Uname: Linux 3.0.0-16-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CheckboxSubmission: 65532cf2dcc18adf59d8dfa735190aed
CheckboxSystem: 3e53d3ea5811723345f19eff5070f9ab
Date: Mon Jan 30 07:18:03 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/mumble
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
ProcCmdline: mumble
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7fa3c9e9bd68: cmp 0x10(%rax),%r14
 PC (0x7fa3c9e9bd68) ok
 source "0x10(%rax)" (0x3e0800003e080010) not located in a known VMA region (needed readable region)!
 destination "%r14" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: mumble
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 malloc () from /lib/x86_64-linux-gnu/libc.so.6
 QListData::detach_grow(int*, int) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 ?? ()
 ?? ()
Title: mumble crashed with SIGSEGV in malloc()
UpgradeStatus: Upgraded to oneiric on 2011-10-19 (101 days ago)
UserGroups: adm admin cdrom dialout lpadmin netdev plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 _int_malloc (av=0x7fa3a0000020, bytes=40) at malloc.c:4339
 __GI___libc_malloc (bytes=40) at malloc.c:3660
 QListData::detach_grow(int*, int) () from /tmp/tmpx90rGq/usr/lib/x86_64-linux-gnu/libQtCore.so.4
 QList<AudioOutputUser*>::detach_helper_grow (this=0x7fa3ba2f1f30, i=2147483647, c=1) at /usr/include/qt4/QtCore/qlist.h:664
 append (t=@0x7fa3ba2f1f50, this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:497