[ Mac wk1 Debug ] http/tests/css/shared-stylesheet-mutation-preconstruct.html is flaky failing.

[Jason Lawrence]

http/tests/css/shared-stylesheet-mutation-preconstruct.html

Description:
This test is flaky failing on Mac wk1 Debug. The failures have been occurring through most of the visible history.

History:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fcss%2Fshared-stylesheet-mutation-preconstruct.html&platform=mac&flavor=wk1&style=debug&limit=50000

Diff:
--- /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/http/tests/css/shared-stylesheet-mutation-preconstruct-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/http/tests/css/shared-stylesheet-mutation-preconstruct-actual.txt
@@ -175,7 +175,7 @@
 
 Test 12
 --------------------------------------
-PASS getComputedStyle(testElement, null).getPropertyValue('background-color') is 'rgb(0, 128, 0)'
+FAIL getComputedStyle(testElement, null).getPropertyValue('background-color') should be rgb(0, 128, 0). Was rgba(0, 0, 0, 0).
 
 @import url("data:text/css;charset=utf-8,%23testdiv%7Bbackground-color%3Agreen%20!important%7D");
 #testdiv { background-color: green; }

[Radar WebKit Bug Importer]

<rdar://problem/60795743>

[Jason Lawrence]

I have marked this test as failing while this issue is investigated.
https://trac.webkit.org/changeset/258881/webkit

[Jason Lawrence]

*** This bug has been marked as a duplicate of bug 209072 ***