Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

This bug was originally reported at https://launchpad.net/bugs/361542

The user reported a crash on startup, while KMail was retrieving messages from the server. He also mentioned that the filter was configured to use spamassassin.

Here's the backtrace:

#0  KMail::FilterImporterExporter::writeFiltersToConfig (filters=@0x0, 
    config=0x1b60df0, bPopFilter=144) at /usr/include/qt4/QtCore/qstring.h:413
	filterGroups = $2 = -99
.
Thread 2 (process 5740):
#0  0x00007facdaa3d742 in select () from /lib/libc.so.6
#1  0x00007facdb5aef06 in QProcessManager::run (this=0x1981bf0)
    at io/qprocess_unix.cpp:305
	readset = {fds_bits = {128, 0 <repeats 15 times>}}
	nselect = <value optimized out>
	c = 0 '\0'
#2  0x00007facdb4e7952 in QThreadPrivate::start (arg=0x1981bf0)
    at thread/qthread_unix.cpp:189
	data = (QThreadData *) 0x198de20
#3  0x00007facd64f73ba in start_thread () from /lib/libpthread.so.0
#4  0x00007facdaa44fcd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#5  0x0000000000000000 in ?? ()
.
Thread 1 (process 5686):
#0  KMail::FilterImporterExporter::writeFiltersToConfig (filters=@0x0, 
    config=0x1b60df0, bPopFilter=144) at /usr/include/qt4/QtCore/qstring.h:413
	filterGroups = Current language:  auto; currently c
Current language:  auto; currently c++