Audacity crashes with ../nptl/pthread_mutex_lock.c:359: __pthread_mutex_lock_full: Assertion `robust || (oldval & 0x40000000) == 0' failed.

I have a 8 hour recording which seems to play fine once if I click any where and press play. If I stop the playback and I zoom out and place the marker somwhere else and press play audacity seems to suffer from a snd_pcm_recover under run and the sound sounds streched with a few seconds of playback which results in audacity showing that the recording is in its first minute after playback, say 5 seconds after plyback has started again. If I pause the playback and resume playback, Audacity continues with the above. If I stop playback Audacity crashes with ../nptl/pthread_mutex_lock.c:359: __pthread_mutex_lock_full: Assertion `robust || (oldval & 0x40000000) == 0' failed.

I have tried extracting 2 hours from the 8 hour recording and saved that as a seperate Audacity Project and I still get the crash mentioned above.

Running audacity from the command line and repeating the above, I get a few errors on startup and the above problem errors on the CLI (see attached CLI error messags.txt)

I am able to reproduce this all the time, so I am going to see if I can get more debugging information to resolve this.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: audacity 2.0.5-1ubuntu3
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: fglrx
AlsaCards:
 0 [Intel ]: HDA-Intel - HDA Intel
                       HDA Intel at 0xfe9fc000 irq 44
  1 [HDMI ]: HDA-Intel - HDA ATI HDMI
                       HDA ATI HDMI at 0xfea9c000 irq 45
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu May 15 19:16:36 2014
InstallationDate: Installed on 2014-03-10 (65 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
SourcePackage: audacity
UpgradeStatus: Upgraded to trusty on 2014-04-02 (43 days ago)
---
AlsaCards:
 0 [Intel ]: HDA-Intel - HDA Intel
                       HDA Intel at 0xfe9fc000 irq 44
  1 [HDMI ]: HDA-Intel - HDA ATI HDMI
                       HDA ATI HDMI at 0xfea9c000 irq 45
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CurrentDesktop: GNOME
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2014-03-10 (65 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
NonfreeKernelModules: fglrx
Package: audacity 2.0.5-1ubuntu3
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Tags: trusty
Uname: Linux 3.13.0-24-generic x86_64
UpgradeStatus: Upgraded to trusty on 2014-04-02 (43 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers www-data
_MarkForUpload: True