pydoc2.7 crashed with SIGSEGV in __find_specmb()

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coredump after a submitting "pydoc -k os" from shell

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: python2.7 2.7.2-13ubuntu5
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic i686
ApportVersion: 1.94-0ubuntu1
Architecture: i386
Date: Sun Mar 4 22:10:49 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/pydoc2.7
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python2.7 /usr/bin/pydoc -k os
ProcEnviron:
 TERM=xterm
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x55f896 <vfprintf+166>: movl $0x25,0x4(%esp)
 PC (0x0055f896) ok
 source "$0x25" ok
 destination "0x4(%esp)" (0xbf5aafc4) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: python2.7
StacktraceTop:
 g_return_if_fail_warning () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_type_get_qdata () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
Title: pydoc2.7 crashed with SIGSEGV in g_return_if_fail_warning()
UpgradeStatus: Upgraded to precise on 2012-02-28 (5 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 __find_specmb (format=0x9e4422 <Address 0x9e4422 out of bounds>) at printf-parse.h:99
 _IO_vfprintf_internal (s=0xbf5ab5a0, format=0x9e4422 <Address 0x9e4422 out of bounds>, ap=0xbf5abb6c "8dK") at vfprintf.c:1326
 __GI___vasprintf_chk (result_ptr=0xbf5ab6ac, flags=1, format=0x9e4422 <Address 0x9e4422 out of bounds>, args=0xbf5abb6c "8dK") at vasprintf_chk.c:68
 ?? ()
 ?? ()