[Webkit-unassigned] [Bug 230905] New: [ iOS, Mac ] imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230905

            Bug ID: 230905
           Summary: [ iOS, Mac ]
                    imported/w3c/web-platform-tests/css/css-cascade/layer-
                    counter-style-override.html is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ehutchison at apple.com

imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override.html

is a flaky failure on Mac and iOS

History: https://results.webkit.org/?suite=layout-tests&test=imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override.html

Results: https://build.webkit.org/results/Apple-iPadOS-14-Simulator-Release-WK2-Tests/r283163%20(2261)/results.html

Diff:
--- /Volumes/Data/worker/ipados-simulator-14-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override-expected.txt
+++ /Volumes/Data/worker/ipados-simulator-14-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override-actual.txt
@@ -1,6 +1,6 @@

-FAIL @counter-style layered overrides unlayered assert_equals: expected "31.21875px" but got "0px"
-FAIL @counter-style override between layers assert_equals: expected "31.21875px" but got "6px"
-FAIL @counter-style override update with appended sheet 1 assert_equals: expected "31.21875px" but got "6px"
-FAIL @counter-style override update with appended sheet 2 assert_equals: expected "31.21875px" but got "6px"
+FAIL @counter-style layered overrides unlayered assert_equals: expected "31.21875px" but got "5px"
+FAIL @counter-style override between layers assert_equals: expected "31.21875px" but got "5px"
+FAIL @counter-style override update with appended sheet 1 assert_equals: expected "31.21875px" but got "5px"
+FAIL @counter-style override update with appended sheet 2 assert_equals: expected "31.21875px" but got "5px"

Issue started when test was introduced at https://trac.webkit.org/changeset/283162/webkit.

Reproduced ToT (r283178) using run-webkit-tests --ios-simulator --iterations 1000 -f --clobber-old-results --exit-after-n-failures 1 imported/w3c/web-platform-tests/css/css-cascade/layer-counter-style-override.html

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