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Bug#339386: marked as done (SIGSEGV in many KDE applications, possibly related to libqt3-mt)

Your message dated Fri, 12 May 2006 08:57:49 -0400
with message-id <200605120857.50556.chrsmrtn@debian.org>
and subject line SIGSEGV in many KDE applications, possibly related to libqt3-mt
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what I am
talking about this indicates a serious mail system misconfiguration
somewhere.  Please contact me immediately.)

Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message --- 
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.
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1231399232 (LWP 5993)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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(no debugging symbols found)
[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

--- End Message ---
--- Begin Message --- 
We applied a number of random-crash fixes to Qt, and the random crashes 
have more or less gone away. I suspect that this bug is a leftover and 
can be closed, but let us know if not.

--- End Message ---
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