213135 2020-06-12 10:01:53 -0700 REGRESSION(r261985): Unable to respond to large comments on Bugzilla with always-on scrollbars 2020-06-12 23:13:19 -0700 1 1 1 Unclassified WebKit Scrolling WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 212168 1 cdumez simon.fraser ap cmarcelo ews-watchlist fred.wang ggaren jamesr koivisto luiz simon.fraser thorton tonikitoo webkit-bug-importer oldest_to_newest 1662002 0 cdumez 2020-06-12 10:01:53 -0700 Unable to respond to large comments on Bugzilla: 1. Go to https://bugs.webkit.org/show_bug.cgi?id=212981 2. Click the "Reply" link next to comment #14 -> Notice that the page hangs 1662003 1 cdumez 2020-06-12 10:02:40 -0700 This is a recent regression, I am trying to bisect now. 1662006 2 cdumez 2020-06-12 10:04:01 -0700 Current regression range: http://trac.webkit.org/log/trunk/?mode=follow_copy&rev=262244&stop_rev=261979 1662010 3 cdumez 2020-06-12 10:14:42 -0700 http://trac.webkit.org/log/trunk/?mode=follow_copy&rev=261996&stop_rev=261980 1662012 4 webkit-bug-importer 2020-06-12 10:18:55 -0700 <rdar://problem/64302086> 1662013 5 cdumez 2020-06-12 10:19:07 -0700 Confirmed regression from Simon's http://trac.webkit.org/changeset/261985/webkit. 1662132 6 simon.fraser 2020-06-12 13:49:33 -0700 We programmatically scroll on the main thread to reveal the text field, and then AsyncScrollingCoordinator::synchronizeStateFromScrollingTree() clobbers that scroll offset with the current state of the scrolling tree. 1662321 7 401824 simon.fraser 2020-06-12 21:07:51 -0700 Created attachment 401824 Patch 1662331 8 ews-feeder 2020-06-12 23:13:17 -0700 Committed r262996: <https://trac.webkit.org/changeset/262996> All reviewed patches have been landed. Closing bug and clearing flags on attachment 401824. 401824 2020-06-12 21:07:51 -0700 2020-06-12 23:13:18 -0700 Patch bug-213135-20200612210749.patch text/plain 14906 simon.fraser U3VidmVyc2lvbiBSZXZpc2lvbjogMjYyODMzCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggYWE2ZTM2MGZlMmIxNTk2 Y2YwOTg0ZTM3Y2U4MTA3NTRiOGU4MmE4OC4uMDQwYzBhNGNmNWMyZmMwZWE0OTE0NjhkZDdhMzY2 MjYyYmYxMTM5YSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDQ1IEBACisyMDIwLTA2LTEyICBTaW1v biBGcmFzZXIgIDxzaW1vbi5mcmFzZXJAYXBwbGUuY29tPgorCisgICAgICAgIFJFR1JFU1NJT04o cjI2MTk4NSk6IFVuYWJsZSB0byByZXNwb25kIHRvIGxhcmdlIGNvbW1lbnRzIG9uIEJ1Z3ppbGxh IHdpdGggYWx3YXlzLW9uIHNjcm9sbGJhcnMKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5v cmcvc2hvd19idWcuY2dpP2lkPTIxMzEzNQorICAgICAgICA8cmRhcjovL3Byb2JsZW0vNjQzMDIw ODY+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisgICAgICAgIAorICAg 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