tst_qquickwindow::openglContextCreatedSignal is flaky on openSuse

agent:2019/04/25 14:41:38 build.go:655: 
agent:2019/04/25 14:41:38 build.go:449: Executing instruction 295 of 486 - RunQtUnitTest
agent:2019/04/25 14:41:38 runner.go:72: Generating test results with TESTARGS=-o /home/qt/work/testresults/tests/auto/quick/qquickwindow694685088,xml -o -,txt
agent:2019/04/25 14:41:38 build.go:314: [make check -j1] 900 900
agent:2019/04/25 14:41:38 build.go:192: /home/qt/work/qt/qtdeclarative/tests/auto/quick/qquickwindow/target_wrapper.sh  ./tst_qquickwindow -o /home/qt/work/testresults/tests/auto/quick/qquickwindow694685088,xml -o -,txt
agent:2019/04/25 14:41:38 build.go:192: ********* Start testing of tst_qquickwindow *********
agent:2019/04/25 14:41:38 build.go:192: Config: Using QtTest library 5.12.3, Qt 5.12.3 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 7.4.0)
agent:2019/04/25 14:41:38 build.go:192: PASS   : tst_qquickwindow::initTestCase()
agent:2019/04/25 14:41:38 build.go:192: QWARN  : tst_qquickwindow::openglContextCreatedSignal() QSGThreadedRenderLoop: expose event received for window QQuickWindow(0x7fff27de6780 exposed, visibility=QWindow::Windowed, flags=QFlags<Qt::WindowType>(Window), title=openglContextCreatedSignal, geometry=0,0 0x0) with invalid geometry: QRect(0,0 0x0) on QScreen(0x7c08b0, name=Virtual-1)
agent:2019/04/25 14:41:38 build.go:192: QWARN  : tst_qquickwindow::openglContextCreatedSignal() QSGThreadedRenderLoop: expose event received for window QQuickWindow(0x7fff27de6780 exposed, visibility=QWindow::Windowed, flags=QFlags<Qt::WindowType>(Window), title=openglContextCreatedSignal, geometry=0,0 0x0) with invalid geometry: QRect(0,0 0x0) on QScreen(0x7c08b0, name=Virtual-1)
agent:2019/04/25 14:41:38 build.go:192: FAIL!  : tst_qquickwindow::openglContextCreatedSignal() Compared pointers are not the same
agent:2019/04/25 14:41:38 build.go:192:    Loc: [tst_qquickwindow.cpp(507)]
agent:2019/04/25 14:41:38 build.go:192: PASS   : tst_qquickwindow::aboutToStopSignal()
agent:2019/04/25 14:41:38 build.go:192: PASS   : tst_qquickwindow::constantUpdates()
agent:2019/04/25 14:41:38 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(blocked, beforeRender)
agent:2019/04/25 14:41:38 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(blocked, afterRender)
agent:2019/04/25 14:41:39 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(blocked, swapped)
agent:2019/04/25 14:41:39 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(unblocked, beforeRender)
agent:2019/04/25 14:41:39 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(unblocked, afterRender)
agent:2019/04/25 14:41:39 build.go:192: PASS   : tst_qquickwindow::constantUpdatesOnWindow(unblocked, swapped)
agent:2019/04/25 14:41:39 build.go:192: PASS   : tst_qquickwindow::mouseFiltering()
agent:2019/04/25 14:41:40 build.go:192: PASS   : tst_qquickwindow::headless()