Bug 195934 - Some elements lag behind async overflow scrolling on palace-games.com
Summary: Some elements lag behind async overflow scrolling on palace-games.com
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Simon Fraser (smfr)
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2019-03-18 22:08 PDT by Simon Fraser (smfr)
Modified: 2019-03-20 14:42 PDT (History)
7 users (show)

See Also:


Attachments
Reduction with iframe (6.16 KB, text/html)
2019-03-18 22:08 PDT, Simon Fraser (smfr)
no flags Details
Reduction (1.07 KB, text/html)
2019-03-18 22:14 PDT, Simon Fraser (smfr)
no flags Details
Patch (20.18 KB, patch)
2019-03-19 19:25 PDT, Simon Fraser (smfr)
zalan: review+
ews: commit-queue-
Details | Formatted Diff | Diff
Archive of layout-test-results from ews122 for ios-simulator-wk2 (2.77 MB, application/zip)
2019-03-20 00:27 PDT, Build Bot
no flags Details

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Description Simon Fraser (smfr) 2019-03-18 22:08:05 PDT
Created attachment 365123 [details]
Reduction with iframe

Load palace-games.com on macOS with async overflow scrolling enabled, and click the "Reserve a room today" button. Scroll the resulting sheet. Note that the green dots lag behind the scrolling.
Comment 1 Simon Fraser (smfr) 2019-03-18 22:14:28 PDT
Created attachment 365124 [details]
Reduction
Comment 2 Radar WebKit Bug Importer 2019-03-18 22:18:22 PDT
<rdar://problem/49007139>
Comment 3 Simon Fraser (smfr) 2019-03-19 19:25:45 PDT
Created attachment 365290 [details]
Patch
Comment 4 Build Bot 2019-03-20 00:27:46 PDT
Comment on attachment 365290 [details]
Patch

Attachment 365290 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: https://webkit-queues.webkit.org/results/11576513

New failing tests:
scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html
Comment 5 Build Bot 2019-03-20 00:27:49 PDT
Created attachment 365324 [details]
Archive of layout-test-results from ews122 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews122  Port: ios-simulator-wk2  Platform: Mac OS X 10.13.6
Comment 6 Simon Fraser (smfr) 2019-03-20 09:45:21 PDT
https://trac.webkit.org/r243211
Comment 7 Truitt Savell 2019-03-20 13:33:29 PDT
The new test scrollingcoordinator/scrolling-tree/positioned-nodes-complex.html

is failing constantly from https://trac.webkit.org/changeset/243211/webkit

History:
http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=scrollingcoordinator%2Fscrolling-tree%2Fpositioned-nodes-complex.html

is this just a rebase?

Diff:
--- /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/scrollingcoordinator/scrolling-tree/positioned-nodes-complex-expected.txt
+++ /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/scrollingcoordinator/scrolling-tree/positioned-nodes-complex-actual.txt
@@ -132,6 +132,14 @@
         (layer-position-at-last-layout (10,28))
         (positioning-behavior moves))
       (related overflow nodes 1)
+      (children 1
+        (Positioned node
+          (layout constraints 
+            (layer-position-at-last-layout (79,18))
+            (positioning-behavior stationary))
+          (related overflow nodes 1)
+        )
+      )
     )
   )
 )
Comment 8 Simon Fraser (smfr) 2019-03-20 14:42:33 PDT
Yes, the test needs rebaselining.