Interesting clue found in the stack trace:
#3 0x00007f9b318ba34e in qt_message_output (msgType=QtFatalMsg, buf=0x16da038 "ASSERT failure in QList<T>::at: \"index out of range\", file /usr/include/qt4/QtCore/qlist.h, line 456") at global/qglobal.cpp:2240
Interesting clue found in the stack trace:
#3 0x00007f9b318ba34e in qt_message_output (msgType= QtFatalMsg, buf=0x16da038 "ASSERT failure in QList<T>::at: \"index out of range\", file /usr/include/ qt4/QtCore/ qlist.h, line 456") at global/ qglobal. cpp:2240