[Webkit-unassigned] [Bug 198129] New: REGRESSION: Layout Test scrollbars/overflow-custom-scrollbar-crash.html is flaky

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed May 22 10:26:19 PDT 2019


            Bug ID: 198129
           Summary: REGRESSION: Layout Test
                    scrollbars/overflow-custom-scrollbar-crash.html is
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tsavell at apple.com

The following layout test is flaky on MacOS WK1


Probable cause:

This test became flakey recently. The test does not fail when ran on its own. using the list of tests on the same test runner I was able to bisect down to 1 test that is causing the failure: 

Running this test before scrollbars/overflow-custom-scrollbar-crash.html casques a 100% failure. 

I am able to reproduce it using command:
rwt --root testbuild-245594 pointerevents/mouse/pointerdown-prevent-default.html scrollbars/overflow-custom-scrollbar-crash.html --child-processes 1 -1

Flakiness Dashboard:


--- /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/scrollbars/overflow-custom-scrollbar-crash-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/scrollbars/overflow-custom-scrollbar-crash-actual.txt
@@ -1 +1,2 @@
+CONSOLE MESSAGE: line 100: TypeError: undefined is not an object (evaluating 'scroller.parentNode')
 This test should not crash

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