tst_QParallelAnimationGroup::deleteChildrenWithRunningGroup() is flaky

Module "qt/qtbase" (558a9993a34e1a838b4d498dfeafc4acd381a28e) Failed test(s): /Users/qt/work/qt/qtbase/tests/auto/corelib/animation/qparallelanimationgroup:
 agent:2017/06/19 00:51:58 build.go:344: Executing instruction 67 of 940
 agent:2017/06/19 00:51:58 build.go:270: [make check -j1] 900 1200
 /Users/qt/work/qt/qtbase/tests/auto/corelib/animation/qparallelanimationgroup/target_wrapper.sh  ./tst_qparallelanimationgroup -o /Users/qt/work/testresults/tests/auto/corelib/animation/qparallelanimationgroup382454042,xml -o -,txt
 ********* Start testing of tst_QParallelAnimationGroup *********
 Config: Using QtTest library 5.9.1, Qt 5.9.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 8.0.0 (clang-800.0.42.1) (Apple))
 PASS   : tst_QParallelAnimationGroup::initTestCase()
 PASS   : tst_QParallelAnimationGroup::construction()
 PASS   : tst_QParallelAnimationGroup::setCurrentTime()
 PASS   : tst_QParallelAnimationGroup::stateChanged()
 PASS   : tst_QParallelAnimationGroup::clearGroup()
 PASS   : tst_QParallelAnimationGroup::propagateGroupUpdateToChildren()
 PASS   : tst_QParallelAnimationGroup::updateChildrenWithRunningGroup()
 FAIL!  : tst_QParallelAnimationGroup::deleteChildrenWithRunningGroup() 'group.currentLoopTime() > 0' returned FALSE. ()
    Loc: [tst_qparallelanimationgroup.cpp(486)]
 PASS   : tst_QParallelAnimationGroup::startChildrenWithStoppedGroup()
 PASS   : tst_QParallelAnimationGroup::stopGroupWithRunningChild()
 PASS   : tst_QParallelAnimationGroup::startGroupWithRunningChild()
 PASS   : tst_QParallelAnimationGroup::zeroDurationAnimation()
 PASS   : tst_QParallelAnimationGroup::stopUncontrolledAnimations()
 PASS   : tst_QParallelAnimationGroup::loopCount(50)
 PASS   : tst_QParallelAnimationGroup::loopCount(100)
 PASS   : tst_QParallelAnimationGroup::loopCount(110)
 PASS   : tst_QParallelAnimationGroup::loopCount(120)
 PASS   : tst_QParallelAnimationGroup::loopCount(170)
 PASS   : tst_QParallelAnimationGroup::loopCount(220)
 PASS   : tst_QParallelAnimationGroup::loopCount(230)
 PASS   : tst_QParallelAnimationGroup::loopCount(240)
 PASS   : tst_QParallelAnimationGroup::loopCount(290)
 PASS   : tst_QParallelAnimationGroup::loopCount(340)
 PASS   : tst_QParallelAnimationGroup::loopCount(350)
 PASS   : tst_QParallelAnimationGroup::loopCount(360)
 PASS   : tst_QParallelAnimationGroup::loopCount(410)
 PASS   : tst_QParallelAnimationGroup::loopCount(460)
 PASS   : tst_QParallelAnimationGroup::loopCount(470)
 PASS   : tst_QParallelAnimationGroup::loopCount(480)
 PASS   : tst_QParallelAnimationGroup::loopCount(120-110)
 PASS   : tst_QParallelAnimationGroup::loopCount(120-50)
 PASS   : tst_QParallelAnimationGroup::loopCount(120-0)
 PASS   : tst_QParallelAnimationGroup::loopCount(300-110)
 PASS   : tst_QParallelAnimationGroup::loopCount(300-50)
 PASS   : tst_QParallelAnimationGroup::loopCount(300-0)
 PASS   : tst_QParallelAnimationGroup::loopCount(115-105)
 PASS   : tst_QParallelAnimationGroup::loopCount(b120-120)
 PASS   : tst_QParallelAnimationGroup::loopCount(b120-110)
 PASS   : tst_QParallelAnimationGroup::loopCount(b120-100)
 PASS   : tst_QParallelAnimationGroup::loopCount(b120-50)
 PASS   : tst_QParallelAnimationGroup::loopCount(b120-0)
 PASS   : tst_QParallelAnimationGroup::loopCount(b360-170)
 PASS   : tst_QParallelAnimationGroup::loopCount(b360-220)
 PASS   : tst_QParallelAnimationGroup::loopCount(b360-210)
 PASS   : tst_QParallelAnimationGroup::loopCount(b360-120)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-110)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-120)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-140)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-240)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-260)
 PASS   : tst_QParallelAnimationGroup::loopCount(b50-350)
 PASS   : tst_QParallelAnimationGroup::loopCount(inf1220)
 PASS   : tst_QParallelAnimationGroup::loopCount(inf1310)
 PASS   : tst_QParallelAnimationGroup::loopCount(b.inf120-120)
 PASS   : tst_QParallelAnimationGroup::loopCount(b.inf120-20)
 PASS   : tst_QParallelAnimationGroup::loopCount(b.inf120-110)
 PASS   : tst_QParallelAnimationGroup::autoAdd()
 PASS   : tst_QParallelAnimationGroup::pauseResume()
 PASS   : tst_QParallelAnimationGroup::crashWhenRemovingUncontrolledAnimation()
 PASS   : tst_QParallelAnimationGroup::cleanupTestCase()
 Totals: 59 passed, 1 failed, 0 skipped, 0 blacklisted, 1288ms
 ********* Finished testing of tst_QParallelAnimationGroup *********
 make: *** [check] Error 1
 
 agent:2017/06/19 00:51:59 build.go:200: Process finished with error: exit status 2
 agent:2017/06/19 00:51:59 build.go:152: Error reading from stdout/err: exit status 2
 agent:2017/06/19 00:52:19 build.go:270: [make check -j1] 900 1200
 /Users/qt/work/qt/qtbase/tests/auto/corelib/animation/qparallelanimationgroup/target_wrapper.sh  ./tst_qparallelanimationgroup deleteChildrenWithRunningGroup
 ********* Start testing of tst_QParallelAnimationGroup *********
 Config: Using QtTest library 5.9.1, Qt 5.9.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 8.0.0 (clang-800.0.42.1) (Apple))
 PASS   : tst_QParallelAnimationGroup::initTestCase()
 PASS   : tst_QParallelAnimationGroup::deleteChildrenWithRunningGroup()
 PASS   : tst_QParallelAnimationGroup::cleanupTestCase()
 Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 1131ms
 ********* Finished testing of tst_QParallelAnimationGroup *********
 
 agent:2017/06/19 00:52:21 build.go:270: [make check -j1] 900 1200
 /Users/qt/work/qt/qtbase/tests/auto/corelib/animation/qparallelanimationgroup/target_wrapper.sh  ./tst_qparallelanimationgroup deleteChildrenWithRunningGroup
 ********* Start testing of tst_QParallelAnimationGroup *********
 Config: Using QtTest library 5.9.1, Qt 5.9.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 8.0.0 (clang-800.0.42.1) (Apple))
 PASS   : tst_QParallelAnimationGroup::initTestCase()
 FAIL!  : tst_QParallelAnimationGroup::deleteChildrenWithRunningGroup() 'group.currentLoopTime() > 0' returned FALSE. ()
    Loc: [tst_qparallelanimationgroup.cpp(486)]
 PASS   : tst_QParallelAnimationGroup::cleanupTestCase()
 Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 1105ms
 ********* Finished testing of tst_QParallelAnimationGroup *********
 make: *** [check] Error 1
 
 agent:2017/06/19 00:52:22 build.go:200: Process finished with error: exit status 2
 agent:2017/06/19 00:52:22 build.go:152: Error reading from stdout/err: exit status 2
 agent:2017/06/19 00:52:22 agent.go:167: Test failed
 agent:2017/06/19 00:52:22 agent.go:121: ERROR building: exit status 2
 Build log: https://testresults.qt.io/logs/qt/qtbase/255052c7ed8a177799bb5fcb8580622a0e5a2050/MacOSMacOS_10_12x86_64MacOSMacOS_10_12x86_64Clangqtci-macos-10.12-x86_64-8-9339dbDebugAndRelease_Release/7ca30f915833d953146007e71743147e3e719500/test_1497818935/testlog.txt.gz
 Details: https://testresults.qt.io/coin/integration/qt/qtbase/tasks/1497818894