Bug 179597

Version:           1.10.3 (using KDE 4.1.3)
Compiler:          g++ (Ubuntu 4.3.2-1ubuntu11) 4.3.2 
OS:                Linux
Installed from:    Ubuntu Packages

I highlighted all messages in my inbox and then elected to 'Apply All Filters'. Kmail hung and when I ran the 'top' command in a terminal, I saw clamscan running at around 90% CPU usage. Eventually Kmail crashed and I got the following backtrace

Application: KMail (kmail), signal SIGSEGV
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[Thread debugging using libthread_db enabled]
[New Thread 0xb41bd6c0 (LWP 15881)]
[New Thread 0xb1159b90 (LWP 15904)]
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[KCrash handler]
#6  0xb6822913 in ?? () from /usr/lib/libQtGui.so.4
#7  0xb68219e5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#8  0xb684b7aa in ?? () from /usr/lib/libQtGui.so.4
#9  0xb63766f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#10 0xb6379da3 in ?? () from /usr/lib/libglib-2.0.so.0
#11 0xb6379f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#12 0xb7eec478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#13 0xb684aea5 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb7ec052a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#15 0xb7ec06ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#16 0xb7ec2da5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#17 0xb67b0767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#18 0x0804a6c0 in _start ()
#0  0xb7fdf430 in __kernel_vsyscall ()