197938 2019-05-15 19:14:56 -0700 A resize changes the compositing configuration with this test 2019-05-15 19:14:56 -0700 1 1 1 Unclassified WebKit Compositing WebKit Nightly Build Unspecified Unspecified NEW P2 Normal --- 1 simon.fraser webkit-unassigned oldest_to_newest 1536701 0 370018 simon.fraser 2019-05-15 19:14:56 -0700 Created attachment 370018 Testcase A window resize triggers a change in the compositing configuration of this content, making the clipping layer fall back to painting into an ancestor. That suggests statefulness which should not be there. 370018 2019-05-15 19:14:56 -0700 2019-05-15 19:14:56 -0700 Testcase clipping-overlap.html text/html 996 simon.fraser PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgICA8c3R5bGU+CgkJLmNvbnRhaW5lciB7 CgkJCXBhZGRpbmc6IDEwcHg7CgkJCWJvcmRlcjogMXB4IHNvbGlkIGJsYWNrOwoJCX0KCiAgICAg ICAgLmJveCB7CgkJCW1hcmdpbjogMTBweDsKICAgICAgICAgICAgaGVpZ2h0OiAyMDBweDsKICAg ICAgICAgICAgd2lkdGg6IDIwMHB4OwogICAgICAgICAgICBiYWNrZ3JvdW5kLWNvbG9yOiBzaWx2 ZXI7CiAgICAgICAgfQoJCQoJCS5jbGlwcGluZyB7CiAgICAgICAgICAgIHBvc2l0aW9uOiByZWxh dGl2ZTsKCQkJb3ZlcmZsb3c6IGhpZGRlbjsKCQkJei1pbmRleDogMDsKCQkJbWFyZ2luOiAyMHB4 OwoJCQlwYWRkaW5nOiAxMHB4OwoJCX0KCQkKCQkub3ZlcmxhcHBpbmcgewogICAgICAgICAgICBw b3NpdGlvbjogcmVsYXRpdmU7CgkJCXRvcDogLTUwcHg7CgkJCWxlZnQ6IDUwcHg7CgkJCXotaW5k ZXg6IDA7CgkJfQoJCQoJCS5jaGlsZCB7CiAgICAgICAgICAgIGhlaWdodDogMTUwcHg7CiAgICAg ICAgICAgIHdpZHRoOiAxNTBweDsKCQkJYmFja2dyb3VuZC1jb2xvcjogZ3JlZW47CgkJfQoKICAg ICAgICAuY29tcG9zaXRlZCB7CiAgICAgICAgICAgIHRyYW5zZm9ybTogdHJhbnNsYXRlWigwKTsK ICAgICAgICB9CgkJCgkJLnJlbGF0aXZlIHsKCQkJcG9zaXRpb246IHJlbGF0aXZlOwoJCX0KCgkJ LmFic29sdXRlIHsKCQkJcG9zaXRpb246IGFic29sdXRlOwoJCX0KICAgICAgICAKICAgIDwvc3R5 bGU+CjwvaGVhZD4KPGJvZHk+Cgk8ZGl2IGNsYXNzPSJjb21wb3NpdGVkIGNvbnRhaW5lciI+CgkJ PGRpdiBjbGFzcz0iY2xpcHBpbmcgYm94Ij4KCQkJT3ZlcmxhcHBpbmcgYm94LgoJCQk8ZGl2IGNs YXNzPSJjb21wb3NpdGVkIGNoaWxkIGJveCI+CgkJCQlDaGlsZCBib3guCgkJCTwvZGl2PgoJCTwv ZGl2PgoJPC9kaXY+CgkKCTxkaXYgY2xhc3M9Im92ZXJsYXBwaW5nIGJveCI+CgkJT3ZlcmxhcHBp bmcKCTwvZGl2Pgo8L2JvZHk+CjwvaHRtbD4K