Summary: | REGRESSION (r245170): gmail.com header flickers when hovering over the animating buttons | ||||||||||||||||||
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Product: | WebKit | Reporter: | Simon Fraser (smfr) <simon.fraser> | ||||||||||||||||
Component: | Compositing | Assignee: | Simon Fraser (smfr) <simon.fraser> | ||||||||||||||||
Status: | RESOLVED FIXED | ||||||||||||||||||
Severity: | Normal | CC: | commit-queue, ews-watchlist, koivisto, rniwa, simon.fraser, webkit-bug-importer, zalan | ||||||||||||||||
Priority: | P2 | Keywords: | InRadar | ||||||||||||||||
Version: | WebKit Nightly Build | ||||||||||||||||||
Hardware: | Unspecified | ||||||||||||||||||
OS: | Unspecified | ||||||||||||||||||
Attachments: |
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Description
Simon Fraser (smfr)
2019-05-16 21:04:59 PDT
Created attachment 370101 [details]
Reduction
I think this is about a negative z-index child that causes its enclosing stacking context to become composited late. If that layer was sharing, we make it non-sharing, but leave the overlap map in a bad state. Yeah we double-push a container to the overlap map in that case. Created attachment 370102 [details]
Patch
Comment on attachment 370102 [details] Patch Attachment 370102 [details] did not pass mac-ews (mac): Output: https://webkit-queues.webkit.org/results/12212813 Number of test failures exceeded the failure limit. Created attachment 370103 [details]
Archive of layout-test-results from ews102 for mac-highsierra
The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews102 Port: mac-highsierra Platform: Mac OS X 10.13.6
Comment on attachment 370102 [details] Patch Attachment 370102 [details] did not pass mac-wk2-ews (mac-wk2): Output: https://webkit-queues.webkit.org/results/12212837 Number of test failures exceeded the failure limit. Created attachment 370104 [details]
Archive of layout-test-results from ews107 for mac-highsierra-wk2
The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews107 Port: mac-highsierra-wk2 Platform: Mac OS X 10.13.6
Comment on attachment 370102 [details] Patch Attachment 370102 [details] did not pass mac-debug-ews (mac): Output: https://webkit-queues.webkit.org/results/12212853 Number of test failures exceeded the failure limit. Created attachment 370105 [details]
Archive of layout-test-results from ews112 for mac-highsierra
The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews112 Port: mac-highsierra Platform: Mac OS X 10.13.6
Comment on attachment 370102 [details] Patch Attachment 370102 [details] did not pass win-ews (win): Output: https://webkit-queues.webkit.org/results/12212889 New failing tests: fast/block/float/list-marker-is-float-crash.html imported/blink/compositing/video/video-controls-layer-creation-squashing.html fast/events/media-element-focus-tab.html Created attachment 370106 [details]
Archive of layout-test-results from ews213 for win-future
The attached test failures were seen while running run-webkit-tests on the win-ews.
Bot: ews213 Port: win-future Platform: CYGWIN_NT-10.0-17763-3.0.5-338.x86_64-x86_64-64bit
Created attachment 370122 [details]
Patch
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