REGRESSION (r249132): [macOS WK2] Layout Test inspector/layers/layerTreeDidChange.html is a flaky failure

• Component: Web Inspector
• Status: RESOLVED FIXED

[Ryan Haddad]

The following layout test is flaky on macOS WK2 bots, most frequently failing in the debug configuration.

inspector/layers/layerTreeDidChange.html

Probable cause:

Unknown. The first failure on the dashboard blames https://trac.webkit.org/log/webkit/?verbose=on&rev=249133&stop_rev=249132

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=inspector%2Flayers%2FlayerTreeDidChange.html



--- /Volumes/Data/slave/mojave-debug-tests-wk2/build/layout-test-results/inspector/layers/layerTreeDidChange-expected.txt
+++ /Volumes/Data/slave/mojave-debug-tests-wk2/build/layout-test-results/inspector/layers/layerTreeDidChange-actual.txt
@@ -3,11 +3,14 @@
 
 == Running test suite: LayerTree.layerTreeDidChange
 -- Running test case: LayerTree.layerTreeDidChange.WithRequest
+Layer tree changed
 Creating layer...
 Layer tree changed
 Creating layer...
 Layer tree changed
-PASS: LayerTreeDidChange should fire after layersForNode is called
+FAIL: LayerTreeDidChange should fire after layersForNode is called
+    Expected: 2
+    Actual: 3
 
 -- Running test case: LayerTree.layerTreeDidChange.WithoutRequest
 Creating layer...

[Devin Rousso]

Created attachment 377930 [details]
Patch

[Joseph Pecoraro]

Comment on attachment 377930 [details]
Patch

rs=me

[WebKit Commit Bot]

Comment on attachment 377930 [details]
Patch

Clearing flags on attachment: 377930

Committed r249447: <https://trac.webkit.org/changeset/249447>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/54999525>