Bug 211149 – [ Mac wk2 ] (r259872) scrollingcoordinator/mac/latching/horizontal-overflow-in-vertical-overflow.html is a flaky failure

• Status: NEW
• Component: Scrolling

[Truitt Savell]

scrollingcoordinator/mac/latching/horizontal-overflow-in-vertical-overflow.html

This test is a rare flaky failure on Mac wk2

History
https://results.webkit.org/?suite=layout-tests&test=scrollingcoordinator%2Fmac%2Flatching%2Fhorizontal-overflow-in-vertical-overflow.html&limit=50000

Diff
--- /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/scrollingcoordinator/mac/latching/horizontal-overflow-in-vertical-overflow-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/scrollingcoordinator/mac/latching/horizontal-overflow-in-vertical-overflow-actual.txt
@@ -4,7 +4,7 @@
 PASS outerScroller.scrollTop is 0
 PASS innerScroller.scrollTop is 0
 After scrolll
-PASS outerScroller.scrollTop is 200
+FAIL outerScroller.scrollTop should be 200. Was 100.
 PASS innerScroller.scrollTop is 0
 PASS successfullyParsed is true
 

Reproduced with:
run-webkit-tests --iterations 2000 --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --debug-rwt-logging --no-retry --force --no-build -f scrollingcoordinator/mac/latching/horizontal-overflow-in-vertical-overflow.html

[Radar WebKit Bug Importer]

<rdar://problem/62550691>

[Truitt Savell]

This test was introduced in https://trac.webkit.org/changeset/259872/webkit

[Simon Fraser (smfr)]

100 vs 200 means we got one fewer wheel events, probably because they got coalesced.