gdm-simple-slave crashed with SIGSEGV in _nss_compat_getpwnam_r()

[Mike Mestnik]

startx /usr/bin/gnome-shell; # Works.

startx; # This starts and displays an error, unlike GDM where X exits after the session leader segfaults.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gdm 3.0.4-0ubuntu12
ProcVersionSignature: Ubuntu 3.2.0-6.12-generic-pae 3.2.0-rc6
Uname: Linux 3.2.0-6-generic-pae i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Mon Dec 26 14:39:30 2011
ExecutablePath: /usr/lib/gdm/gdm-simple-slave
ProcCmdline: /usr/lib/gdm/gdm-simple-slave --display-id /org/gnome/DisplayManager/Display1
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
SegvAnalysis:
 Segfault happened at: 0xb682280e <_nss_compat_getpwnam_r+62>: movzbl (%edx),%eax
 PC (0xb682280e) ok
 source "(%edx)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gdm
StacktraceTop:
 _nss_compat_getpwnam_r () from /lib/i386-linux-gnu/libnss_compat.so.2
 getpwnam_r () from /lib/i386-linux-gnu/libc.so.6
 getpwnam () from /lib/i386-linux-gnu/libc.so.6
 ?? ()
 ?? ()
Title: gdm-simple-slave crashed with SIGSEGV in _nss_compat_getpwnam_r()
UpgradeStatus: Upgraded to precise on 2011-12-21 (5 days ago)
UserGroups: pulse-access

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #805154, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.