help() modules crashes with SIGSEGV in apt_pkg.so

[Dave Morley]

I got the crash by opening ipython and running help() once in the interactive help I typed in modules, there were a couple of errors show up in the shell but then it crashed.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: ipython 0.11-2
ProcVersionSignature: Ubuntu 3.2.0-5.11-generic 3.2.0-rc5
Uname: Linux 3.2.0-5-generic i686
NonfreeKernelModules: wl
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Sat Dec 17 00:30:02 2011
ExecutablePath: /usr/bin/ipython
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111212)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: python /usr/bin/ipython
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
SegvAnalysis:
 Segfault happened at: 0x5421f9 <vfprintf+201>: movl $0x25,0x4(%esp)
 PC (0x005421f9) ok
 source "$0x25" ok
 destination "0x4(%esp)" (0xbf28bfa0) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: ipython
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: ipython crashed with SIGSEGV in g_return_if_fail_warning()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 __find_specmb (format=0xbe175a <Address 0xbe175a out of bounds>) at printf-parse.h:99
 _IO_vfprintf_internal (s=0x6bdc98, format=0x6bb343 <Address 0x6bb343 out of bounds>, ap=0x28 <Address 0x28 out of bounds>) at vfprintf.c:1325
 __GI___vasprintf_chk (result_ptr=0xbf28c64c, flags=1, format=0xbe175a <Address 0xbe175a out of bounds>, args=0xbf28cb0c "\230\334k") at vasprintf_chk.c:68
 ?? ()
 ?? ()

[Julian Taylor (jtaylor)]

this is not a ipython issue, but help(), modules attempts to import all modules and crashes in one of them.
for me it crashes in python-apt:

gdb /usr/bin/python-dbg
(gdb) r
>> help()
>>> modules
Program received signal SIGSEGV, Segmentation fault.
(gdb) bt
#0 0x0000000000018236 in ?? ()
#1 0x00007fffefd006e1 in initapt_pkg () from /usr/lib/python2.7/dist-packages/apt_pkg.so
#2 0x000000000054778d in _PyImport_LoadDynamicModule (name=0x7fffffff5794 "apt_pkg", pathname=
    0x7fffffff46a0 "/usr/lib/python2.7/dist-packages/apt_pkg.so", fp=0x266f200)
    at ../Python/importdl.c:53
#3 0x0000000000543734 in load_module (name=0x7fffffff5794 "apt_pkg", fp=0x266f200, pathname=
    0x7fffffff46a0 "/usr/lib/python2.7/dist-packages/apt_pkg.so", type=3, loader=0x0)
    at ../Python/import.c:1834
#4 0x0000000000545940 in import_submodule (mod=None, subname=0x7fffffff5794 "apt_pkg", fullname=
    0x7fffffff5794 "apt_pkg") at ../Python/import.c:2596

[Julian Andres Klode (juliank)]

The reported bug was for python-gobject, but the comment by Julian Taylor is a different issue, in apt_pkg.

Probably should reassign this one to pygobject, and then either open a new one for python-apt or close it (there are not enough information [line number] to debug this anyway).

What's preferred?

[Launchpad Janitor (janitor)]

[Expired for python-apt (Ubuntu) because there has been no activity for 60 days.]