[Webkit-unassigned] [Bug 196044] New: REGRESSION: (r243224 - r243230) Layout Test printing/width-overflow.html and inspector/css/shadow-scoped-style.html are failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196044

            Bug ID: 196044
           Summary: REGRESSION: (r243224 - r243230) Layout Test
                    printing/width-overflow.html and
                    inspector/css/shadow-scoped-style.html are failing
           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
                CC: lforschler at apple.com

The following layout tests ar failing on Mac

printing/width-overflow.html 
inspector/css/shadow-scoped-style.html

Probable cause:

These two tests began failing at the same time. I was able to reproduce the failures on a release build of 243230. there is a gap in builds between that and 243224 which doesn't have a failure. I can't reproduce the failures in debug. 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=printing%2Fwidth-overflow.html

Diff:
--- /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/inspector/css/shadow-scoped-style-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/inspector/css/shadow-scoped-style-actual.txt
@@ -21,6 +21,8 @@
 }
 address, article, aside, div, footer, header, hgroup, layer, main, nav, section {
 }
+html {
+}

 -- Running test case: CSS.ShadowScopedStyle.ElementInShadowTree
 PASS: Node should not have shadow roots.

Diff:
https://build.webkit.org/results/Apple%20Mojave%20Release%20WK1%20(Tests)/r243246%20(3825)/printing/width-overflow-diff.txt

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