texworks crashed with SIGSEGV in QTextLine::textStart()

[Matteo Bertini]

Binary package hint: texworks

Activated Auto-Follow facus

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: texworks 0.3~svn671-2build1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: wl nvidia
Architecture: amd64
Date: Wed Apr 6 17:13:46 2011
ExecutablePath: /usr/bin/texworks
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcCmdline: texworks
ProcEnviron:
 LANGUAGE=it_IT:en
 PATH=(custom, user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f99f2c924d4 <_ZNK9QTextLine9textStartEv+20>: mov (%rbx),%rax
 PC (0x7f99f2c924d4) ok
 source "(%rbx)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: texworks
StacktraceTop:
 QTextLine::textStart() const () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
 ?? () from /usr/lib/libQtGui.so.4
Title: texworks crashed with SIGSEGV in QTextLine::textStart()
UpgradeStatus: Upgraded to natty on 2011-04-05 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 detach (this=0x7fffa6d65d90) at ../../include/QtCore/../../src/corelib/tools/qvector.h:134
 data (this=0x7fffa6d65d90) at ../../include/QtCore/../../src/corelib/tools/qvector.h:139
 operator[] (this=0x7fffa6d65d90) at ../../include/QtCore/../../src/corelib/tools/qvector.h:348
 QTextLine::textStart (this=0x7fffa6d65d90) at text/qtextlayout.cpp:2067
 QTextDocumentLayoutPrivate::drawBlock (this=0x252f720, offset=..., painter=0x7fffa6d668a0, context=..., bl=..., inRootFrame=<value optimized out>) at text/qtextdocumentlayout.cpp:1300

[Andreas Moog (ampelbein)]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. Please answer these questions:

* Is this reproducible?
* If so, what specific steps should we take to recreate this bug?

This will help us to find and resolve the problem.

 status incomplete
 subscribe

[Stefan Löffler (st.loeffler)]

Hi. I believe that this is connected to Qt 4.7.2 in natty (as opposed to 4.7.0 in maverick). Anyway, this seems to be closely related to the upstream bugs http://code.google.com/p/texworks/issues/detail?id=505 http://code.google.com/p/texworks/issues/detail?id=497 and http://code.google.com/p/texworks/issues/detail?id=469

Can you test if the latest build available at https://launchpad.net/~texworks/+archive/ppa fixes this issue?