[Webkit-unassigned] [Bug 284898] New: REGRESSION (272231 at main): [ macOS wk1 ] Two fonts tests are a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284898

            Bug ID: 284898
           Summary: REGRESSION (272231 at main): [ macOS wk1 ] Two fonts
                    tests are a flaky failure
           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: rackler at apple.com
                CC: bfulgham at webkit.org, repstein at apple.com,
                    webkit-bot-watchers-bugzilla at group.apple.com,
                    webkit-bug-importer at group.apple.com

Description:
fonts/font-weight-invalid-crash.html
fonts/ligature.html

The test fonts/font-cache-memory-pressure-crash.html , was introduced at https://commits.webkit.org/272231@main. This implementation corresponded with the onset of inconsistent test results, transitioning from consistent passes to frequent flaky failures.

This issue can be bisected to <commit> using the command: 
run-webkit-tests --debug -1 --no-retry --force --iterations=50 --clobber-old-results --child-processes 1 --test-list testlist-font-weight-invalid-crash.txt
run-webkit-tests --debug -1 --no-retry --force --iterations=50 --clobber-old-results --child-processes 1 --test-list testlist-ligature.txt

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=fonts%2Ffont-weight-invalid-crash.html&test=fonts%2Fligature.html&flavor=wk1&recent=false

Diff:
fonts/font-weight-invalid-crash.html
-PASS
-
+Test passes if it doesn't crash.
+ｕｎｄｅｆｉｎｅｄ

Image Diff:
fonts/ligature.html
On view layout test results it shows 'images diff (nan%)' and both links open to 404 Not Found

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