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Issue 880762 link

Starred by 3 users

Issue metadata

Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug-Regression



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CSS calculation 1px off on 100% zoom, but correct on all other zoom levels

Reported by phil...@naderer-puiu.at, Sep 5

Issue description

UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0

Steps to reproduce the problem:
1. visit orf.at
2. look at the photo grid at the top
3. the pseudo-element which is repsonsible for the shadow is 1px missaligned on 100% zoom
4. zoom out or in, it will fit perfectly

What is the expected behavior?
Position the pseudo-element exactly at the bottom line of each photo grid item

What went wrong?
It is 1px missaligned since Chrome 69, but worked in prior Chrome releases. It also works in all other browsers.

Did this work before? Yes 68.0.3440.106 (stable) (64-Bit)

Does this work in other browsers? Yes

Chrome version: 69.0.3497.81 (Offizieller Build) (64-Bit) (cohort: 69_win_81)  Channel: stable
OS Version: 10.0
Flash Version:
 
05-09-_2018_12-50-26.png
670 KB View Download
05-09-_2018_12-49-40.png
546 KB View Download
05-09-_2018_12-46-15.png
539 KB View Download
Labels: Needs-Triage-M69
Labels: Needs-Bisect
Components: Blink>Paint
Labels: -Pri-2 -Needs-Bisect hasbisect-per-revision ReleaseBlock-Stable Triaged-ET M-69 Target-70 Target-71 RegressedIn-69 FoundIn-71 FoundIn-70 Target-69 FoundIn-69 OS-Linux OS-Mac Pri-1
Owner: schenney@chromium.org
Status: Assigned (was: Unconfirmed)
Able to reproduce the issue on Windows 10, mac 10.13.3 and Ubuntu 17.10 using chrome reported version #69.0.3497.81 and latest canary #71.0.3543.0.

Bisect Information:
=====================
Good build: 69.0.3476.0
Bad Build : 69.0.3477.0

Change Log URL: 
https://chromium.googlesource.com/chromium/src/+log/8117ad42726252bd38e4f4908f9e15daa0b4c831..ae49f5caf2943049acab4abe802e82c8dc001184

From the above change log suspecting below change
Change-Id: I32689f285d621afb7ec929eb193d7683dd15ff01
Reviewed-on: https://chromium-review.googlesource.com/1112563

schenney@ - Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.
Note: Adding stable blocker for M-69 as it seems to be a recent regression. Please feel free to remove the same if not appropriate.

Thanks...!!
Labels: -Pri-1 -ReleaseBlock-Stable Pri-2
A couple of cases of background rendering have regressed and our tests didn't catch it. Not a P1 and not Stable blocking because, while ugly, it's not preventing functioning of the site. But something I will try to fix.
Just wanted to add that users noticed the bug already and we "blame" the Chrome update in our communication with them now. I hope we will see the bugfix sooner than later since with around a million of users having the issue it's a little bit annoying.
We found a simple workaround by decreasing a padding. So if it looks fixed now, it's our workaround.

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