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Issue 852339 link

Starred by 1 user
Status: Duplicate
Merged: issue 849854
Owner: ----
Closed: Jun 2018
Cc:
vmp...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Compat



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CSS background-attachment: fixed not working on rare cases

Reported by rol...@nextendweb.com, Jun 13 2018 
UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36

Example URL:
https://jsfiddle.net/y196qLd3/1/

Steps to reproduce the problem:
1. Open jsfiddle: https://jsfiddle.net/y196qLd3/1/
2. Scroll to the bottom

What is the expected behavior?
You should see on bottom of the page a background-attachment:fixed background image

What went wrong?
Image does not show and leaves white area

Does it occur on multiple sites: N/A

Is it a problem with a plugin? N/A 

Did this work before? Yes Chrome 66.x

Does this work in other browsers? N/A

Chrome version: 67.0.3396.87  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version:

Comment 1 by rol...@nextendweb.com, Jun 13 2018 

Another example for this bug: https://jsfiddle.net/xq79erso/

Note: If the CSS transform applied in the CSS panel, it works fine. If its inline, it does not work.

Comment 2 by woxxom@gmail.com, Jun 13 2018 

Simplifed test.html attached.
Expected: blue box at the bottom
Observed: nothing

Bisected to r537454 = 0a9a5c311a1d3a298f952e495510bd6fe3faa2f6 = https://crrev.com/c/923572 by wangxianzhu@chromium.org
"[SPv175] Enable SlimmingPaintV175 by default"
Landed in 66.0.3351.0

Confirmed by disabling SP175 and observing the bug is gone:
chrome --disable-blink-features=SlimmingPaintV175

To find the underlying bug I forced SP175 via --enable-blink-features=SlimmingPaintV175,
and bisected to r501502 = 1dd12d1e64b4f5777d5a1623700572f8dd9a3d4b = https://crrev.com/c/654438 by trchen@chromium.org
"[Blink] Add new mode to use property tree to paint in SPv1"
test.html
628 bytes View Download

Comment 3 by dtapu...@chromium.org, Jun 13 2018

Components: Blink>Paint

Comment 4 by pdr@chromium.org, Jun 13 2018

Mergedinto: 849854
Status: Duplicate (was: Unconfirmed)
Thank you for taking the time to file this with a minimal testcase!

We have a pending fix for this in  https://crbug.com/849854  and I confirmed it fixes your testcase too. I'm going to merge this into there, please follow along at 849854.
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