[Webkit-unassigned] [Bug 219967] New: REGRESSION: [ Big Sur Mac WK2 ] imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/mime-types/canPlayType.html is failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=219967

            Bug ID: 219967
           Summary: REGRESSION: [ Big Sur Mac WK2 ]
                    imported/w3c/web-platform-tests/html/semantics/embedde
                    d-content/media-elements/mime-types/canPlayType.html
                    is failing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tsavell at apple.com

imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/mime-types/canPlayType.html

this began failing with r270890

history:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fsemantics%2Fembedded-content%2Fmedia-elements%2Fmime-types%2FcanPlayType.html

Diff:
--- /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/mime-types/canPlayType-expected.txt
+++ /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/mime-types/canPlayType-actual.txt
@@ -48,12 +48,12 @@
 PASS video/ogg codecs order
 PASS video/ogg with bogus codec
 PASS video/ogg with and without codecs
-PASS video/webm (optional)
+FAIL video/webm (optional) assert_equals: video/webm expected "maybe" but got ""
 FAIL video/webm; codecs="opus" (optional) assert_equals: video/webm; codecs="opus" expected "probably" but got ""
 FAIL video/webm; codecs="vorbis" (optional) assert_equals: video/webm; codecs="vorbis" expected "probably" but got ""
-PASS video/webm; codecs="vp8" (optional)
+FAIL video/webm; codecs="vp8" (optional) assert_equals: video/webm; codecs="vp8" expected "probably" but got ""
 FAIL video/webm; codecs="vp8.0" (optional) assert_equals: video/webm; codecs="vp8.0" expected "probably" but got ""
-PASS video/webm; codecs="vp9" (optional)
+FAIL video/webm; codecs="vp9" (optional) assert_equals: video/webm; codecs="vp9" expected "probably" but got ""
 FAIL video/webm; codecs="vp9.0" (optional) assert_equals: video/webm; codecs="vp9.0" expected "probably" but got ""
 PASS video/webm codecs subset
 PASS video/webm codecs order

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