191289 2018-11-05 17:11:09 -0800 [WebKitTestRunner][DumpRenderTree] document.body.scrollTop is 0 after page is scrolled 2018-11-07 10:51:13 -0800 1 1 1 Unclassified WebKit Tools / Tests WebKit Local Build All All NEW https://bugs.webkit.org/show_bug.cgi?id=191284 P2 Normal --- 1 dbates webkit-unassigned ap lforschler simon.fraser zalan oldest_to_newest 1475344 0 353927 dbates 2018-11-05 17:11:09 -0800 Created attachment 353927 LayoutTest This issue only reproduces in WebKitTestRunner and DumpRenderTree (why?). That is the test passes in Safari when run manually. Apply the attached patch and then run the test: run-webkit-tests http/tests/navigation/frameset-cross-origin-frame-scrolls-to-anchor.html The test will fail with the following output diff: [[ --- /Volumes/.../layout-test-results/http/tests/navigation/frameset-cross-origin-frame-scrolls-to-anchor-expected.txt +++ /Volumes/.../layout-test-results/http/tests/navigation/frameset-cross-origin-frame-scrolls-to-anchor-actual.txt @@ -14,9 +14,10 @@ PASS window.scrollY is 0 After scroll: -PASS document.body.scrollTop > 0 is true +FAIL document.body.scrollTop > 0 should be true. Was false. PASS window.scrollY > 0 is true PASS successfullyParsed is true +Some tests failed. TEST COMPLETE ]] The test registers a scroll event listener and emits both document.body.scrollTop and window.scrollY. The scroll event is dispatched and window.scrollY > 0 at the end of the test. For some reason document.body.scrollTop == 0 before and after the test. 1475346 1 353929 dbates 2018-11-05 17:14:04 -0800 Created attachment 353929 LayoutTest 1476066 2 simon.fraser 2018-11-07 10:51:13 -0800 This could be affected by the value of settings().CSSOMViewScrollingAPIEnabled(). See Document::scrollingElement(). 353927 2018-11-05 17:11:09 -0800 2018-11-05 17:14:04 -0800 LayoutTest LayoutTest.diff text/plain 1548 dbates ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL2h0dHAvdGVzdHMvbmF2aWdhdGlvbi9mcmFtZXNldC1j cm9zcy1vcmlnaW4tZnJhbWUtc2Nyb2xscy10by1hbmNob3ItZXhwZWN0ZWQudHh0IGIvTGF5b3V0 VGVzdHMvaHR0cC90ZXN0cy9uYXZpZ2F0aW9uL2ZyYW1lc2V0LWNyb3NzLW9yaWdpbi1mcmFtZS1z Y3JvbGxzLXRvLWFuY2hvci1leHBlY3RlZC50eHQKbmV3IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXgg MDAwMDAwMDAwMDAuLmQ2MTA4YjYxN2NmCi0tLSAvZGV2L251bGwKKysrIGIvTGF5b3V0VGVzdHMv aHR0cC90ZXN0cy9uYXZpZ2F0aW9uL2ZyYW1lc2V0LWNyb3NzLW9yaWdpbi1mcmFtZS1zY3JvbGxz LXRvLWFuY2hvci1leHBlY3RlZC50eHQKQEAgLTAsMCArMSwyMiBAQAorCisKKy0tLS0tLS0tCitG cmFtZTogJzwhLS1mcmFtZTEtLT4nCistLS0tLS0tLQorR28gdG8gYm90dG9tCitUZXN0cyB0aGF0 IGEgZnJhbWVzZXQgcGFnZSBjYW4gc2Nyb2xsIHRvIGl0cyBvd24gYW5jaG9yLgorCitPbiBzdWNj ZXNzLCB5b3Ugd2lsbCBzZWUgYSBzZXJpZXMgb2YgIlBBU1MiIG1lc3NhZ2VzLCBmb2xsb3dlZCBi eSAiVEVTVCBDT01QTEVURSIuCisKKworQmVmb3JlIHNjcm9sbDoKK1BBU1MgZG9jdW1lbnQuYm9k 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