Bug#339386: SIGSEGV in many KDE applications, possibly related to libqt3-mt
Package: libqt3-mt
Version: 3:3.3.5-1
Severity: important
Starting KlineakConfig crashes.
Turning off VisualBoyAdvance plugin in KDevelop3 crashes.
Konqueror can crash after any operation.
Other KDE apps based on Qt crashes frequently.
I tested Debian stable and unstable.
I installed the whole Debian system two times.
I've tried multiple kernels and libc versions.
My findings:
The bug always causes SIGSEGV in libc, when libc function called
from a Qt3 class handling linked lists or similar dynamically sized data
structures. For example: QGList, array of QStrings, QValueList, etc.
Many other bug reports relates to this very annoying bug.
Affects virtually all GUI based KDE applications.
The bug is not affected by choosing between normal and SMP kernel.
The bug is not affected by choosing normal i386 or i686 optimized libc.
The bug occours on Debian stable and unstable distributions.
Typical traceback:
(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
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[Thread debugging using libthread_db enabled]
[New Thread -1231399232 (LWP 5993)]
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[KCrash handler]
#4 0xb6bdfab9 in std::string::assign () from /usr/lib/libstdc++.so.6
#5 0xb6c5c2e9 in LKbd::operator= () from /usr/lib/liblineak.so.0
#6 0x0805cee1 in QValueListPrivate<int>::~QValueListPrivate ()
#7 0x0805d9d6 in QValueListPrivate<int>::~QValueListPrivate ()
#8 0x0807420b in std::operator+<char, std::char_traits<char>, std::allocator<char> > ()
#9 0xb6a03eb0 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#10 0x08053eb1 in ?? ()
Similar tracebacks can be obtained 2-5 times an hour under normal usage.
My system is stable. The memory is good, tested for hours with memtest86.
I use stable IDE disks in normal and RAID1. CPU is not overclocked.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.14-2-686-smp
Locale: LANG=hu_HU, LC_CTYPE=hu_HU (charmap=ISO-8859-2)
Versions of packages libqt3-mt depends on:
ii fontconfig 2.3.2-1.1 generic font configuration library
ii libaudio2 1.7-3 The Network Audio System (NAS). (s
ii libc6 2.3.5-8 GNU C Library: Shared libraries an
ii libfontconfig1 2.3.2-1.1 generic font configuration library
ii libfreetype6 2.1.10-1 FreeType 2 font engine, shared lib
ii libgcc1 1:4.0.2-3 GCC support library
ii libice6 6.8.2.dfsg.1-10 Inter-Client Exchange library
ii libjpeg62 6b-10 The Independent JPEG Group's JPEG
ii libmng1 1.0.8-1 Multiple-image Network Graphics li
ii libpng12-0 1.2.8rel-5 PNG library - runtime
ii libsm6 6.8.2.dfsg.1-10 X Window System Session Management
ii libstdc++6 4.0.2-3 The GNU Standard C++ Library v3
ii libx11-6 6.8.2.dfsg.1-10 X Window System protocol client li
ii libxcursor1 1.1.3-1 X cursor management library
ii libxext6 6.8.2.dfsg.1-10 X Window System miscellaneous exte
ii libxft2 2.1.7-1 FreeType-based font drawing librar
ii libxi6 6.8.2.dfsg.1-10 X Window System Input extension li
ii libxinerama1 6.8.2.dfsg.1-10 X Window System multi-head display
ii libxrandr2 6.8.2.dfsg.1-10 X Window System Resize, Rotate and
ii libxrender1 1:0.9.0-2 X Rendering Extension client libra
ii libxt6 6.8.2.dfsg.1-10 X Toolkit Intrinsics
ii xlibs 6.8.2.dfsg.1-10 X Window System client libraries m
ii zlib1g 1:1.2.3-6 compression library - runtime
libqt3-mt recommends no packages.
-- no debconf information
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