1451597 - Long pages are only partially painted when scrolling

Status: VERIFIED FIXED

(Core :: Graphics, defect)

Description

[Mayank Bansal]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Build ID: 20180404224504

Steps to reproduce:

1. Create new nightly profile
2. Go to https://bugzilla.mozilla.org/show_bug.cgi?id=1449255
3. Scroll down with scrollbar


Actual results:

parts of the page below the attachmnets/comment0 disappear


Expected results:

not so

2018-04-05T11:33:59: DEBUG : Found commit message:
Bug 1440753: Replace pixman regions with our own region code. r=mattwoodrow

MozReview-Commit-ID: KPsTAw3Uwa2

2018-04-05T11:33:59: INFO : The bisection is done.
2018-04-05T11:33:59: INFO : Stopped

Comment 1

[Mayank Bansal]

Attachment: bug.png

Comment 2

[Bas Schouten (:bas.schouten)]

I can reproduce drawing issues here.

Comment 3

[Bas Schouten (:bas.schouten)]

Hmm, I saw drawing issues once, but now I don't seem to be able to reproduce them again. Any chance anyone is able to reproduce them more consistently in a minimal testcase?

Comment 4

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Attachment: screenshot with white areas

This works for me consistently:

Run

window.open("https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&filter-resultStatus=testfailed&filter-resultStatus=busted&filter-resultStatus=exception&filter-resultStatus=retry&filter-resultStatus=usercancel&filter-resultStatus=runnable&tochange=3c92c9b3f4db5550d2ede28138b1039bc4e93539&fromchange=f7be47711eb6e10c2ce970c6b9eb7a65059d682a", null, "width=990,height=1590")

and scroll down. Look for white areas.

Comment 5

[Francesco Lodolo [:flod]]

Amending the subject, I've already seen this on several websites at this point.

Comment 6

[Francesco Lodolo [:flod]]

Is there a bug that be backed out to fix this? Because Nightly it's pretty much unusable at the moment (had to switch tab 2 or 3 times to insert this comment)

Comment 7

[Pascal Chevrel:pascalc (PTO until April 26)]

(In reply to Francesco Lodolo [:flod] from comment #6)
> Is there a bug that be backed out to fix this? Because Nightly it's pretty
> much unusable at the moment (had to switch tab 2 or 3 times to insert this
> comment)

The patch was backed out 3hours ago https://bugzilla.mozilla.org/show_bug.cgi?id=1440753#c38

I am not hitting this bug with the examples given here so I am guessing that the last nightly already has the patch backed out, did you update today?

Comment 8

[Ryan VanderMeulen [:RyanVM]]

Nightly respins are nearly complete at this point, calling this fix by backout.

Comment 9

[Francesco Lodolo [:flod]]

(In reply to Pascal Chevrel:pascalc from comment #7)
> (In reply to Francesco Lodolo [:flod] from comment #6)
> > Is there a bug that be backed out to fix this? Because Nightly it's pretty
> > much unusable at the moment (had to switch tab 2 or 3 times to insert this
> > comment)
> 
> The patch was backed out 3hours ago
> https://bugzilla.mozilla.org/show_bug.cgi?id=1440753#c38
> 
> I am not hitting this bug with the examples given here so I am guessing that
> the last nightly already has the patch backed out, did you update today?

Thanks. Just received the update, it looks OK.