Bug 209624 – [ Mac wk2 ] tiled-drawing/scrolling/fixed/four-bars-zoomed.html is flaky failing.

• Status: NEW
• Component: Scrolling

[Jason Lawrence]

tiled-drawing/scrolling/fixed/four-bars-zoomed.html

Description:
This test is flaky failing on Mac wk2 Release. When scrolling back through the visible history, it appears that the test was previously failing consistently and then started to flaky fail on 03/19/2020.

History:
https://results.webkit.org/?suite=layout-tests&test=tiled-drawing%2Fscrolling%2Ffixed%2Ffour-bars-zoomed.html&flavor=wk2&style=release

Diff:
--- /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/tiled-drawing/scrolling/fixed/four-bars-zoomed-expected.txt
+++ /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/tiled-drawing/scrolling/fixed/four-bars-zoomed-actual.txt
@@ -56,9 +56,9 @@
       (coverage rect 0.00, 0.00 341.30 x 254.35)
       (intersects coverage rect 1)
       (contentsScale 2.30)
-      (tile cache coverage 0, 0 341 x 445)
-      (tile size 785 x 512)
-      (top left tile 0, 0 tiles grid 1 x 2)
+      (tile cache coverage 0, 0 445 x 445)
+      (tile size 512 x 512)
+      (top left tile 0, 0 tiles grid 2 x 2)
       (in window 1)
       (children 4
         (GraphicsLayer

[Radar WebKit Bug Importer]

<rdar://problem/60940236>

[Jason Lawrence]

I have marked this test as failing while this issue is investigated. 
https://trac.webkit.org/changeset/259088/webkit

[Karl Rackler]

I have marked debug additionally as this test as failing while this issue is investigated.
https://trac.webkit.org/changeset/264757/webkit

[Karl Rackler]

REGRESSION: [ macOS wk2 ] tiled-drawing/scrolling/fixed/four-bars-zoomed.html is a flaky failure

Description:
tiled-drawing/scrolling/fixed/four-bars-zoomed.html

This started approximately 06/12/20 and has been a flaky failure since.

History:
https://results.webkit.org/?suite=layout-tests&test=tiled-drawing%2Fscrolling%2Ffixed%2Ffour-bars-zoomed.html&flavor=wk2&platform=mac&style=debug&limit=50000

Diff:
--- /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/tiled-drawing/scrolling/fixed/four-bars-zoomed-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/tiled-drawing/scrolling/fixed/four-bars-zoomed-actual.txt
@@ -56,9 +56,9 @@
       (coverage rect 0.00, 0.00 341.30 x 254.35)
       (intersects coverage rect 1)
       (contentsScale 2.30)
-      (tile cache coverage 0, 0 341 x 445)
-      (tile size 785 x 512)
-      (top left tile 0, 0 tiles grid 1 x 2)
+      (tile cache coverage 0, 0 445 x 445)
+      (tile size 512 x 512)
+      (top left tile 0, 0 tiles grid 2 x 2)
       (in window 1)
       (children 4
         (GraphicsLayer