Assigning false to a bool property sets it to true

Assigning a bool property to false sets it to true on ARM (qnx). It works fine on the desktop.

qtdeclarative: 14e0e0c000234f67613ea65e3fea1e9c3445844a

Item {
id: root
property bool test: false

MouseArea

}

outputs: "true"

See also the attached testcase which outputs:
1 false
2 true
3 true
4 true
5 false

instead of the expected:

1 false
2 false
3 true
4 false
5 true