QCompleter constructor crash (tested on ARM)

QCompleter constructor crash when only one argument is passed using QT 4.8.2 on ARM.

To replicate the bug, I changed toolbarsearch constructor (toolbarsearch.cpp) from browser example in the following way:
QCompleter *complter= new QCompleter(this);
completer->setModel(m_stringListModel);

while the old code was:
QCompleter *complter= new QCompleter(m_stringListModel,this);

and the QCompleter constructor crashes (segmentation fault).

I changed the constructor since arora web browser (http://code.google.com/p/arora/) passes only one argument to the constructor (and then it crashes).
I think older version of QT are not affected by the bug.