unity-greeter crashed with SIGSEGV in __GI_getenv()

[Rainer Rohde]

This just happened after today's (Jan 18) update.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: unity-greeter 13.04.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-0.4-generic 3.8.0-rc3
Uname: Linux 3.8.0-0-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.8-0ubuntu2
Architecture: amd64
Date: Fri Jan 18 17:30:30 2013
ExecutablePath: /usr/sbin/unity-greeter
MarkForUpload: True
ProcCmdline: /usr/sbin/unity-greeter
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7fd7bf3545cc <getenv+172>: cmp 0x0(%rbp),%r12w
 PC (0x7fd7bf3545cc) ok
 source "0x0(%rbp)" (0x000000c0) not located in a known VMA region (needed readable region)!
 destination "%r12w" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-greeter
StacktraceTop:
 getenv () from /lib/x86_64-linux-gnu/libc.so.6
 jinit_memory_mgr () from /usr/lib/x86_64-linux-gnu/libjpeg.so.8
 jpeg_CreateDecompress () from /usr/lib/x86_64-linux-gnu/libjpeg.so.8
 ?? () from /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-jpeg.so
 ?? () from /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0
Title: unity-greeter crashed with SIGSEGV in getenv()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __GI_getenv (name=0x7fd7a01c6d22 "EGMEM", name@entry=0x7fd7a01c6d20 "JPEGMEM") at getenv.c:89
 jinit_memory_mgr (cinfo=cinfo@entry=0x7fd7a0dd3890) at jmemmgr.c:1139
 jpeg_CreateDecompress (cinfo=cinfo@entry=0x7fd7a0dd3890, version=version@entry=80, structsize=structsize@entry=656) at jdapimin.c:58
 gdk_pixbuf__jpeg_image_load (f=0x7fd79c0009e0, error=0x7fd7a0de4c58) at io-jpeg.c:559
 _gdk_pixbuf_generic_image_load (module=module@entry=0x15e4db0, f=f@entry=0x7fd79c0009e0, error=error@entry=0x7fd7a0de4c58) at gdk-pixbuf-io.c:1013