Comment 2 for bug 856817

StacktraceTop:
 detach (this=<optimized out>) at /usr/include/qt4/QtCore/qdebug.h:85
 data (this=<optimized out>) at /usr/include/qt4/QtCore/qbytearray.h:412
 ~QDebug (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qdebug.h:85
 KeyMonitor::registerEvents (this=0xbfee362c) at /build/buildd/unity-2d-4.10.0/libunity-2d-private/src/keymonitor.cpp:127
 QByteArray::operator= (this=0x3, other=...) at tools/qbytearray.cpp:866