ksvgtopng crashed with SIGSEGV in QString::trimmed()

[Alexandre Demers]

Binary package hint: kdebase-runtime

building NavIt from today's svn

ProblemType: Crash
Architecture: i386
Date: Tue Sep 8 01:46:49 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/ksvgtopng
Package: kdebase-runtime 4:4.3.1-0ubuntu1
ProcCmdline: /usr/bin/ksvgtopng 8 8 country_AU.svg country_AU_8_8.png
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-9.29-generic
SegvAnalysis:
 Segfault happened at: 0x40795c42 <_ZNK7QString7trimmedEv+34>: mov 0x8(%eax),%edx
 PC (0x40795c42) ok
 source "0x8(%eax)" (0x006f0074) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: kdebase-runtime
StacktraceTop:
 QString::trimmed() const () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/libQtSvg.so.4
 ?? () from /usr/lib/libQtSvg.so.4
 ?? () from /usr/lib/libQtSvg.so.4
 ?? () from /usr/lib/libQtSvg.so.4
Title: ksvgtopng crashed with SIGSEGV in QString::trimmed()
Uname: Linux 2.6.31-9-generic i686
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:QString::trimmed () from /usr/lib/libQtCore.so.4
?? () from /usr/lib/libQtSvg.so.4
?? () from /usr/lib/libQtSvg.so.4
?? () from /usr/lib/libQtSvg.so.4
?? () from /usr/lib/libQtSvg.so.4

[Jonathan Thomas (echidnaman)]

Is this crash reproducible? The backtrace isn't very complete, so we'll probably have to get one manually if we can. (Installing libqt4-dbg and libqt4-svg-dbg would help here)

[Alexandre Demers (oxalin)]

I can reproduce it anytime. I'll add both libs and we'll see what we get.

[Alexandre Demers (oxalin)]

I can't seem to find libqt4-svg-dbg (no package, no clue anywhere)... any hint? Added libqt4-dbg.

[Jonathan Thomas (echidnaman)]

Oh, I guess there's not a separate one for the svg libs. libqt4-dev should be fine.

[Alexandre Demers (oxalin)]

Since installing the libs, I still have de SEG fault, but the report is not built automatically as it was. I'm able to create a core dump with gdb, what else would you need? Sorry for asking. I can also provide you the initial .svgz file.

[Jonathan Thomas (echidnaman)]

Sure, attach the svgz and I'll see if I can reproduce it here.

[Alexandre Demers (oxalin)]

Here is what I got when doing
gdb --args /usr/bin/ksvgtopng 96 96 country_AU.svgz country_AU_96_96.png

Program received signal SIGSEGV, Segmentation fault.
0x005f4c42 in QString::trimmed (this=0x817bf48) at tools/qstring.cpp:3923
3923 tools/qstring.cpp: No such file or directory.
 in tools/qstring.cpp

Attached svgz file and core dump

[Jonathan Thomas (echidnaman)]

k, I got the backtrace. Just had to ask gdb to be a bit more verbose. ;-)
I've filed a report with Qt Software, and once they get around to reviewing it hopefully we'll have a URL to their bug tracker we can use.

[Jonathan Thomas (echidnaman)]

Fixed in Qt 4.6 in Kubuntu 10.04.