qtquickcontrols::Tests_MenuBar crash during qt5.git integration in 'dev'

PASS : qtquickcontrols::Tests_MenuBar::initTestCase()
make: *** [check] Segmentation fault (core dumped)
agent:2017/09/01 08:19:24 build.go:203: Process finished with error: exit status 2 agent:2017/09/01 08:19:24 build.go:155: Error reading from stdout/err: exit status 2 agent:2017/09/01 08:19:24 agent.go:76: ERROR building: error unmarshalling testlib xml output: 'XML syntax error on line 523: unexpected EOF'. Most likely the test has crashed

build log: https://testresults.qt.io/logs/qt/qtquickcontrols/0a343f27df7c35d5b7bb01586473278a42737351/WindowsWindows_10x86_64WindowsWindows_10x86_64MSVC2017qtci-windows-10-x86_64-7-889485DebugAndRelease_Release_ForceDebugInfo_OpenGLDynamic/974353fb846aad000ae4f1b6692d31268b3acc58/test_1504241686/testlog.txt.gz

change: https://codereview.qt-project.org/#/c/204113/