216263 2020-09-07 22:25:27 -0700 REGRESSION (r266634): [macOS release] TestWebKitAPI.WebKit.WKThumbnailViewResetsViewStateWhenUnparented is a flaky failure 2020-09-08 10:19:17 -0700 1 1 1 Unclassified WebKit New Bugs Other Unspecified Unspecified RESOLVED DUPLICATE 216258 https://bugs.webkit.org/show_bug.cgi?id=216012 https://bugs.webkit.org/show_bug.cgi?id=216047 InRadar P2 Normal --- 1 ryanhaddad webkit-unassigned sihui_liu webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1686485 0 ryanhaddad 2020-09-07 22:25:27 -0700 The following API test recently became a flaky failure on macOS release bots: TestWebKitAPI.WebKit.WKThumbnailViewResetsViewStateWhenUnparented _RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL. /Volumes/Data/slave/mojave-release/build/Tools/TestWebKitAPI/Tests/WebKit/WKThumbnailView.mm:300 Value of: [[webView objectByEvaluatingJavaScript:@"window.internals.isPageActive()"] boolValue] Actual: false Expected: true https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.WebKit.WKThumbnailViewResetsViewStateWhenUnparented 1686486 1 webkit-bug-importer 2020-09-07 22:25:49 -0700 <rdar://problem/68487302> 1686487 2 ryanhaddad 2020-09-07 22:26:55 -0700 Looks like it started at or around https://trac.webkit.org/changeset/266634/webkit 1686490 3 ryanhaddad 2020-09-07 22:37:04 -0700 (In reply to Ryan Haddad from comment #2) > Looks like it started at or around > https://trac.webkit.org/changeset/266634/webkit Hm, this change may affecting some layout tests, too: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=compositing%2Ftiling%2Ftiled-mask-inwindow.html&test=fast%2Fevents%2Fpage-visibility-iframe-move-test.html&test=pageoverlay%2Foverlay-remove-reinsert-view.html&test=tiled-drawing%2Ftiled-backing-in-window.html 1686551 4 sihui_liu 2020-09-08 07:47:41 -0700 I already filed a bug about this and proposed a fix: https://bugs.webkit.org/show_bug.cgi?id=216258. About layout tests, I can only reproduce failure of fast/animation/request-animation-frame-throttling-lowPowerMode.html so far: https://bugs.webkit.org/show_bug.cgi?id=216261. *** This bug has been marked as a duplicate of bug 216258 *** 1686612 5 ryanhaddad 2020-09-08 10:19:17 -0700 (In reply to Sihui Liu from comment #4) > I already filed a bug about this and proposed a fix: > https://bugs.webkit.org/show_bug.cgi?id=216258. > > About layout tests, I can only reproduce failure of > fast/animation/request-animation-frame-throttling-lowPowerMode.html so far: > https://bugs.webkit.org/show_bug.cgi?id=216261. > > *** This bug has been marked as a duplicate of bug 216258 *** I can reproduce at least one of the failures. Filed https://bugs.webkit.org/show_bug.cgi?id=216275.