. Thread 2 (process 8893): #0 0xb7f55430 in __kernel_vsyscall () #1 0xb66d3a71 in select () from /lib/tls/i686/cmov/libc.so.6 #2 0xb7299b17 in ?? () from /usr/lib/libQtCore.so.4 #3 0xb71ce7d2 in QThread::wait () from /usr/lib/libQtCore.so.4 #4 0xb62394ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0 #5 0xb66db64e in clone () from /lib/tls/i686/cmov/libc.so.6 . Thread 1 (process 8890): #0 0xb420187d in Diff2::KompareModelList::slotActionUnApplyDifference (this=0x8ae2d00) at /build/buildd/kdesdk-4.1.1/kompare/libdiff2/komparemodellist.cpp:1420 No locals. #1 0xb4203c8d in Diff2::KompareModelList::qt_metacall (this=0x8ae2d00, _c=QMetaObject::InvokeMetaMethod, _id=23, _a=0xbfb6d69c) at /build/buildd/kdesdk-4.1.1/obj-i486-linux-gnu/kompare/libdiff2/komparemodellist.moc:147 No locals. #2 0xb72cef79 in QObject::QObject () from /usr/lib/libQtCore.so.4 #3 0xb72cf3b0 in ?? () from /usr/lib/libQtCore.so.4 #4 0xb6979151 in ?? () from /usr/lib/libQtGui.so.4 #5 0xb6979b2f in QAction::setActionGroup () from /usr/lib/libQtGui.so.4 #6 0xb6d9f0e2 in QToolButton::QToolButton () from /usr/lib/libQtGui.so.4 #7 0x00000000 in ?? ()