Ubuntu
python2.7 package

pydoc2.7 crashed with SIGSEGV in g_type_get_qdata()

Bug #921383 reported by Pi Delport on 2012-01-25

This bug report is a duplicate of: Bug #896836: Segmentation fault when asking help() for the list of modules. Edit Remove

12

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	PyGTK	New	Undecided	Unassigned
	python2.7 (Ubuntu)	New	Medium	Unassigned

Bug Description

This happens while attempting pydoc -k.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: python2.7 2.7.2-5ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CrashCounter: 1
Date: Tue Jan 24 12:45:53 2012
ExecutablePath: /usr/bin/pydoc2.7
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python2.7 /usr/bin/pydoc -k yaml
SegvAnalysis:
Segfault happened at: 0x7f39f50dd58b <vfprintf+155>: callq 0x7f39f5121e60 <strchrnul>
PC (0x7f39f50dd58b) ok
source "0x7f39f5121e60" (0x7f39f5121e60) ok
destination "(%rsp)" (0x7ffff69d4f70) 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_type_get_qdata () from /usr/lib/x86_64-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
?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
Title: pydoc2.7 crashed with SIGSEGV in g_type_get_qdata()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: admin

Tags:

Revision history for this message

Pi Delport (pi-delport) wrote on 2012-01-25:

#1

Dependencies.txt Edit (672 bytes, text/plain; charset="utf-8")
Disassembly.txt Edit (918 bytes, text/plain; charset="utf-8")
ProcEnviron.txt Edit (138 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (49.1 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (774 bytes, text/plain; charset="utf-8")
Registers.txt Edit (784 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (241.1 KiB, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (241.1 KiB, text/plain; charset="utf-8")

visibility:

private → public

Revision history for this message

Apport retracing service (apport) wrote on 2012-01-25:

#2

StacktraceTop:
g_type_get_qdata (type=<optimized out>, quark=55) at /build/buildd/glib2.0-2.30.0/./gobject/gtype.c:3668
pygobject_lookup_class (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:905
pygobject_lookup_class (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:894
pyg_type_get_bases (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:659
pygobject_new_with_interfaces (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:702

Revision history for this message

Apport retracing service (apport) wrote on 2012-01-25: Stacktrace.txt

#3

Stacktrace.txt Edit (573.4 KiB, text/plain)

Revision history for this message

Apport retracing service (apport) wrote on 2012-01-25: ThreadStacktrace.txt

#4

ThreadStacktrace.txt Edit (573.5 KiB, text/plain)

Changed in python2.7 (Ubuntu):
importance:	Undecided → Medium
tags:	removed: need-amd64-retrace

Revision history for this message

Pi Delport (pi-delport) wrote on 2012-01-25:

#5

This looks like an "assertion failed" debug print:

#0 __find_specmb (format=0x7f39f1f40732 "%s: assertion `%s' failed") at printf-parse.h:99

is causing unbounded recursion involving the following loop:

...
#10 pygobject_lookup_class (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:894
#11 0x00007f39e88b9032 in pyg_type_get_bases (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:659
#12 0x00007f39e88b90e2 in pygobject_new_with_interfaces (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:702
#13 0x00007f39e88b8fe5 in pygobject_lookup_class (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:913
#14 pygobject_lookup_class (gtype=0) at /build/buildd/pygobject-2-2.28.6/gobject/pygobject.c:894
...

Revision history for this message

Pi Delport (pi-delport) wrote on 2012-01-26:

#6

The last line output just before the segfault:

...
** (python2.7:8669): CRITICAL **: pyg_register_boxed: assertion `boxed_type != 0' failed

Report a bug

This report contains Public information

Everyone can see this information.

Duplicate of bug #896836 Remove

You are

Subscribing...

Edit bug mail

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.