Mayank Bansal Reporter
	Description • 6 years ago

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0

Steps to reproduce:

1. Enable WR
2. Go to https://www.androidcentral.com/poco-f1-vs-oneplus-6
3.  There is a comparison table in the middle of the page
4. Scroll down from the table


Actual results:

the "floating" table header moves down, and then snaps back continously

From the looks of it, this is a APZC+WR bug


Expected results:

not so.

	Mayank Bansal Reporter
	Comment 1 • 6 years ago

ni? ,as this looks like a APZ issue

	Mayank Bansal Reporter
	Comment 2 • 6 years ago

I am scrolling using the mousepad on a laptop

	Darkspirit
	Comment 3 • 6 years ago

A regression date would have to be before 2018-01-15.

	Darkspirit
	Comment 4 • 6 years ago

It's broken since it was implemented:
> Emilio Cobos Álvarez — Bug 975644: Enable position sticky in table parts. r=bz

	Mayank Bansal Reporter
	Comment 5 • 6 years ago

well, this reproduces only with WR for me.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 6 • 6 years ago

Thanks. I can look at this when I'm done my current set of bugs. Leaving unassigned for now in case somebody else wants to do it first.

	Liz Henry (:lizzard) (relman/hg->git project)
	Comment 7 • 6 years ago

Marking fix-optional for 64. We could still take a patch for 65, and if it's verified and doesn't seem risky, could still take fixes for 64 as well.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 8 • 5 years ago

Minimal testcase to repro. Basically, both the <tr> and the <th> are sticky-positioned, so presumably we end up applying the sticky offset twice, or something like that. With async scrolling the header ends up moving against the scroll instead of staying in place.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 9 • 5 years ago

https://treeherder.mozilla.org/#/jobs?repo=try&group_state=expanded&revision=9248c1317a942a91216c4cfde0bc58f71a71f85b

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 11 • 5 years ago

https://treeherder.mozilla.org/#/jobs?repo=try&group_state=expanded&revision=f40f9ac5dfe05ebb6793b3d81ac4fcae3d68d49e

	Pulsebot
	Comment 12 • 5 years ago

Pushed by kgupta@mozilla.com:
https://hg.mozilla.org/integration/autoland/rev/90db69624281
Add reftests for nested sticky-positioning r=kvark

	Eliza Balazs [:ebalazs_]
	Comment 13 • 5 years ago

Backed out changeset 90db69624281 (Bug 1495962) for reftest failures in reftests/position-sticky/nested-sticky-2.html DONTBUILD

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=217619196&repo=autoland&lineNumber=2201
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=217619215&repo=autoland&lineNumber=15068

Push with failures: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception%2Cusercancel%2Crunnable&revision=1fbdcb9480daf162357da72ee263c41165bcac27&selectedJob=217623217&searchStr=windows%2C7%2Creftest

Backout: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception%2Cusercancel%2Crunnable&revision=7b860a9f49a97c6c67b6f4cae452c1630ac17079

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 14 • 5 years ago

Looks like it needs a little fuzz on win7

	Pulsebot
	Comment 15 • 5 years ago

Pushed by kgupta@mozilla.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/e023011bce62
Add reftests for nested sticky-positioning r=kvark

	Pulsebot
	Comment 16 • 5 years ago

Pushed by kgupta@mozilla.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/276e3568f74f
Follow-up to fix overeager fuzzing. r=me

	Pulsebot
	Comment 17 • 5 years ago

Pushed by kgupta@mozilla.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/05d1120d5b91
Loosen fuzz range for win 7 reftest jobs. r=me

	Bogdan Tara[:bogdan_tara | bogdant]
	Comment 18 • 5 years ago
bugherder

https://hg.mozilla.org/mozilla-central/rev/e023011bce62
https://hg.mozilla.org/mozilla-central/rev/276e3568f74f
https://hg.mozilla.org/mozilla-central/rev/05d1120d5b91

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 19 • 5 years ago

WR only, not severe/common enough to uplift, I would say.