[Webkit-unassigned] [Bug 203366] New: REGRESSION: [ iOS ] ( r251015 ) Layout Test fast/text/whitespace/pre-wrap-overflow-selection.html is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203366

            Bug ID: 203366
           Summary: REGRESSION: [ iOS ] ( r251015 ) Layout Test
                    fast/text/whitespace/pre-wrap-overflow-selection.html
                    is flaky
           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

The following layout test is flaky on iOS

fast/text/whitespace/pre-wrap-overflow-selection.html

Probable cause:

This was caused by r251015. It is easily reproducible by just running the test in iterations.

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Ftext%2Fwhitespace%2Fpre-wrap-overflow-selection.html

Diff:
--- /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/fast/text/whitespace/pre-wrap-overflow-selection-expected.txt
+++ /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/fast/text/whitespace/pre-wrap-overflow-selection-actual.txt
@@ -22,12 +22,10 @@
       RenderBlock {HR} at (0,198) size 784x2 [border: (1px inset #000000)]
       RenderBlock {PRE} at (0,213) size 108x78 [border: (4px solid #0000FF)]
         RenderText {#text} at (4,4) size 100x70
-          text run at (4,4) width 86: "This   text"
-          text run at (89,4) width 15: "     "
+          text run at (4,4) width 100: "This   text     "
           text run at (4,18) width 71: "will wrap"
           text run at (74,18) width 1: " "
-          text run at (4,32) width 71: "and   fit"
-          text run at (74,32) width 24: "   "
+          text run at (4,32) width 94: "and   fit   "
           text run at (4,46) width 79: "within the"
           text run at (82,46) width 1: " "
           text run at (4,60) width 32: "box."

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