Bug 208584

Summary: [ Mac wk2 ] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html is flaky failing.
Product: WebKit Reporter: Jason Lawrence <Lawrence.j>
Component: ScrollingAssignee: zalan <zalan>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: aakash_jain, webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Mac   
OS: macOS 10.14   
See Also: https://bugs.webkit.org/show_bug.cgi?id=208833

Description Jason Lawrence 2020-03-04 11:08:35 PST 
fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html

Description:
This test is flaky failing on Mac wk2. The test appears to be flaky failing throughout the visible history. the oldest failure that I see is r251051. The diff has changed over time, r257660 has a different diff.

History:
https://results.webkit.org/?suite=layout-tests&test=fast%2Fscrolling%2Fscroll-animator-overlay-scrollbars-clicked.html&limit=50000&platform=mac&style=debug&style=release

Diff:
--- /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/fast/scrolling/scroll-animator-overlay-scrollbars-clicked-expected.txt
+++ /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/fast/scrolling/scroll-animator-overlay-scrollbars-clicked-actual.txt
@@ -1,7 +1,5 @@
 CONSOLE MESSAGE: MainFrameView: didAddVerticalScrollbar
 CONSOLE MESSAGE: MainFrameView: didAddHorizontalScrollbar
-CONSOLE MESSAGE: FrameView: didAddVerticalScrollbar
-CONSOLE MESSAGE: FrameView: willRemoveVerticalScrollbar
 CONSOLE MESSAGE: FrameView: didAddVerticalScrollbar
 CONSOLE MESSAGE: FrameView: willRemoveVerticalScrollbar
 CONSOLE MESSAGE: line 19: MainFrameView: mouseEnteredContentArea
Comment 1 Radar WebKit Bug Importer 2020-03-04 11:09:01 PST 
<rdar://problem/60047453>
Comment 2 Jason Lawrence 2020-03-04 11:23:34 PST 
I have marked this as failing while this issue is investigated.
https://trac.webkit.org/changeset/257864/webkit
Comment 3 Jason Lawrence 2020-03-04 11:30:38 PST 
I can reproduce this issue on r257842 by running the command below.

run-webkit-tests --iterations 2000 --exit-after-n-failures 5 --force -f fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html --no-retry

[19/2000] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html failed unexpectedly (text diff)
[20/2000] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html failed unexpectedly (text diff)
[20/2000] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html failed unexpectedly (text diff)
[26/2000] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html failed unexpectedly (text diff)
[33/2000] fast/scrolling/scroll-animator-overlay-scrollbars-clicked.html failed unexpectedly (text diff)
Exiting early after 5 failures. 30 tests run.


25 tests ran as expected, 5 didn't (1970 didn't run):
Comment 4 zalan 2020-03-04 15:45:57 PST 
I don't think we should expose the didAddVerticalScrollbar/willRemoveVerticalScrollbar pairs. It does not verify correctness at all.
Comment 6 zalan 2020-03-09 21:32:14 PDT 

*** This bug has been marked as a duplicate of bug 208833 ***