Details
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Bug
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Resolution: Done
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P2: Important
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5.12, 6.0
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macOS
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b426cff1e0363b350f98bc64691b9b279bc6c757 (qt/qtbase/5.12)
Description
EDIT: This ticket is about tst_qgraphicsitem::paint and tst_qgraphicsitem::QTBUG_7714_fullUpdateDiscardingOpacityUpdate2 on MacOS_10_12. While doing stress tests many more tests flake a bit, but the focus is on these two tests as they flake almost on 25% of the CI test runs. For now the paint test has been QSKIPped on MacOS_10_12.
According to the grafana testresults dashboard this is the most flaky test currently, affecting around 30 integrations per week. It shows as flaky only on MacOS_10_12, and the two flaky functions are paint and QTBUG_7714_fullUpdateDiscardingOpacityUpdate2. Also cursor test seems to be flaking a tiny bit, most likely that one has been fixed in the past with QTBUG-73167.
Here is a log snippet for the paint test failing, from this log.
agent:2019/06/21 07:57:45 build.go:207: PASS : tst_QGraphicsItem::sceneEventFilter() agent:2019/06/21 07:57:45 build.go:207: PASS : tst_QGraphicsItem::prepareGeometryChange() agent:2019/06/21 07:58:04 build.go:207: FAIL! : tst_QGraphicsItem::paint() Compared values are not the same agent:2019/06/21 07:58:04 build.go:207: Actual (((tester2.painted))): 3 agent:2019/06/21 07:58:04 build.go:207: Expected (1) : 1 agent:2019/06/21 07:58:04 build.go:207: Loc: [tst_qgraphicsitem.cpp(5082)] agent:2019/06/21 07:58:04 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:04 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:04 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:04 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:04 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: WARNING: tst_QGraphicsItem::deleteItemInEventHandlers() Mouse event "MousePress" not accepted by receiving widget agent:2019/06/21 07:58:05 build.go:207: PASS : tst_QGraphicsItem::deleteItemInEventHandlers() agent:2019/06/21 07:58:05 build.go:207: PASS : tst_QGraphicsItem::itemClipsToShape() agent:2019/06/21 07:58:05 build.go:207: PASS : tst_QGraphicsItem::itemClipsChildrenToShape()
Unfortunately the logs for the other flaky test function (QTBUG_7714_fullUpdateDiscardingOpacityUpdate2) are not available, which leaves it to developers with Mac to reproduce the flakiness. Usually it's enough to load all the CPU cores and keep running the test function in a while loop.
And cursor2 test seems to be the most "flaky fail" test we have, considering the last 30 days of measurements (err, this one is in the tst_qgraphicsview, not tst_qgraphicsitem and has been blacklisted recently).
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