[Webkit-unassigned] [Bug 203157] New: REGRESSION (r251262): Layout Test scrollingcoordinator/ios/non-stable-viewport-scroll.html is a Flaky Failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203157

            Bug ID: 203157
           Summary: REGRESSION (r251262): Layout Test
                    scrollingcoordinator/ios/non-stable-viewport-scroll.ht
                    ml is a Flaky Failure
           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: repstein at apple.com

The following layout test started failing with significantly increased frequency after the changes landed in r251262:

scrollingcoordinator/ios/non-stable-viewport-scroll.html

Steps to Reproduce:

run-webkit-tests --ios-simulator --no-retry --no-sample-on-timeout scrollingcoordinator/ios/non-stable-viewport-scroll.html --iter 100 --force

Test History:

https://results.webkit.org/?suite=layout-tests&test=scrollingcoordinator%2Fios%2Fnon-stable-viewport-scroll.html

Diff:

--- /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/scrollingcoordinator/ios/non-stable-viewport-scroll-expected.txt
+++ /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/scrollingcoordinator/ios/non-stable-viewport-scroll-actual.txt
@@ -2,30 +2,29 @@
 (GraphicsLayer
   (anchor 0.00 0.00)
   (bounds 320.00 5013.00)
-  (visible rect 0.00, 1000.00 106.67 x 182.67)
-  (coverage rect 0.00, 1000.00 106.67 x 182.67)
+  (visible rect 0.00, 817.50 320.00 x 548.00)
+  (coverage rect 0.00, 817.50 320.00 x 548.00)
   (intersects coverage rect 1)
-  (contentsScale 6.00)
+  (contentsScale 2.00)
   (children 1
     (GraphicsLayer
       (bounds 320.00 5013.00)
       (contentsOpaque 1)
-      (visible rect 0.00, 1000.00 106.67 x 182.67)
-      (coverage rect 0.00, 957.33 192.00 x 268.00)
+      (visible rect 0.00, 817.50 320.00 x 548.00)
+      (coverage rect 0.00, 689.50 576.00 x 804.00)
       (intersects coverage rect 1)
-      (contentsScale 6.00)
+      (contentsScale 2.00)
       (children 1
         (GraphicsLayer
           (position 10.00 0.00)
-          (approximate position 10.00 634.66)
+          (approximate position 10.00 817.50)
           (bounds 100.00 548.00)
-          (usingTiledLayer 1)
           (contentsOpaque 1)
           (drawsContent 1)
-          (visible rect 0.00, 365.34 96.67 x 182.66)
-          (coverage rect -10.00, 322.68 192.00 x 268.00)
+          (visible rect 0.00, 0.00 100.00 x 548.00)
+          (coverage rect -10.00, -128.00 576.00 x 804.00)
           (intersects coverage rect 1)
-          (contentsScale 6.00)
+          (contentsScale 2.00)
         )
       )
     )

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