tst_QDialog::showFullScreen() failed on macOS 10.13

agent:2018/08/22 12:05:27 build.go:187: /Users/qt/work/qt/qtbase/tests/auto/widgets/dialogs/qdialog/target_wrapper.sh  ./tst_qdialog -o /Users/qt/work/testresults/tests/auto/widgets/dialogs/qdialog273246239,xml -o -,txt
agent:2018/08/22 12:05:27 build.go:187: ********* Start testing of tst_QDialog *********
agent:2018/08/22 12:05:27 build.go:187: Config: Using QtTest library 5.12.0, Qt 5.12.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 9.1.0 (clang-902.0.39.1) (Apple))
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::initTestCase()
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::getSetCheck()
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showExtension(data0)
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showExtension(data1)
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showExtension(data2)
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showExtension(data3)
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::defaultButtons()
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showMaximized()
agent:2018/08/22 12:05:27 build.go:187: PASS   : tst_QDialog::showMinimized()
agent:2018/08/22 12:05:28 build.go:187: FAIL!  : tst_QDialog::showFullScreen() 'dialog.isFullScreen()' returned FALSE. ()
agent:2018/08/22 12:05:28 build.go:187:    Loc: [tst_qdialog.cpp(351)]
agent:2018/08/22 12:05:28 build.go:187: SKIP   : tst_QDialog::showAsTool() Qt/X11: Skipped since activeWindow() is not respected by all window managers
agent:2018/08/22 12:05:28 build.go:187:    Loc: [tst_qdialog.cpp(362)]
agent:2018/08/22 12:05:28 build.go:187: PASS   : tst_QDialog::toolDialogPosition()
agent:2018/08/22 12:05:30 build.go:187: PASS   : tst_QDialog::deleteMainDefault()
agent:2018/08/22 12:05:30 build.go:187: PASS   : tst_QDialog::deleteInExec()
agent:2018/08/22 12:05:30 build.go:187: PASS   : tst_QDialog::showSizeGrip()
agent:2018/08/22 12:05:30 build.go:187: PASS   : tst_QDialog::setVisible()
agent:2018/08/22 12:05:30 build.go:187: PASS   : tst_QDialog::reject()
agent:2018/08/22 12:05:31 build.go:187: BPASS  : tst_QDialog::snapToDefaultButton()
agent:2018/08/22 12:05:31 build.go:187: PASS   : tst_QDialog::transientParent(Non-native)
agent:2018/08/22 12:05:31 build.go:187: PASS   : tst_QDialog::transientParent(Native)
agent:2018/08/22 12:05:32 build.go:187: PASS   : tst_QDialog::dialogInGraphicsView()
agent:2018/08/22 12:05:32 build.go:187: PASS   : tst_QDialog::cleanupTestCase()
agent:2018/08/22 12:05:32 build.go:187: Totals: 19 passed, 1 failed, 1 skipped, 1 blacklisted, 5151ms
agent:2018/08/22 12:05:32 build.go:187: ********* Finished testing of tst_QDialog *********
agent:2018/08/22 12:05:32 build.go:187: make: *** [check] Error 1
agent:2018/08/22 12:05:32 build.go:231: Process finished with error: exit status 2
agent:2018/08/22 12:05:32 build.go:190: Error reading from stdout/err: exit status 2