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Issue 751964 link

Starred by 1 user
Status: WontFix
Owner:
█ scottchen@chromium.org
Last visit > 30 days ago
Closed: Aug 2017
Cc:
nyerramilli@chromium.org
rbasuvula@chromium.org
█ msrchandra@chromium.org
jmukthavaram@chromium.org
█ ranjitkan@chromium.org
dpa...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 1
Type: Bug-Regression



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Regression: Slider line disappears on zooming out to 33%.

Reported by pranjali...@etouch.net, Aug 3 2017 
Chrome Version:61.0.3163.29 (Official Build) b1e8882790982afc7ba75a4034eb154d9594d01a-refs/branch-heads/3163@{#245}(32/64 bit).

OS: Windows (7,8,8.1,10),Linux (14.04 LTS),Mac OS X(10.11.6,10.12.3).

Steps to reproduce:
1. Launch Chrome and navigate to chrome://settings/fonts
2. Set 'Minimum font size' to '8' and zoom out up to 33%
3. Observe 'Minimum font size' and 'Font size' slider line 

Actual Result: 'Minimum Font size'  and 'Font size' slider line disappear on zooming out to 33%
Expected Result:'Minimum Font size' and 'Font size' slider line should not disappear on zooming out to 33%

This is regression issue broken in 'M-56' and will soon update the bisect info:

Manual Bisect Info: 
Good build: 56.0.2909.0
Bad build: 56.0.2910.0
Actual_result.png
58.2 KB View Download
Expected_Result.png
69.7 KB View Download

Comment 1 by jmukthavaram@chromium.org, Aug 3 2017

Cc: jmukthavaram@chromium.org
Labels: -M-61 hasbisect-per-revision M-62
Owner: scottchen@chromium.org
Status: Assigned (was: Unconfirmed)
Able to reproduce the issue on Windows 7, mac 10.12.6 & Ubuntu 14.04 using latest Canary-62.0.3174.2.

Manual Bisect Info: 
--------------------
Good build: 56.0.2909.0 -Revision-429737
Bad build:  56.0.2910.0 -Revision-430103

Per revision bisect info:
-------------------------
You are probably looking for a change made after 429947 (known good), but no later than 429948 (first known bad).
CHANGELOG URL:
The script might not always return single CL as suspectas some perf builds might get missing due to failure.
https://chromium.googlesource.com/chromium/src/+log/036476bd03c34f8810127be6680f7534ab050380..b0d714461da621694d56f8949545d7da6cb551ea

Possible suspect:
-----------------
https://chromium.googlesource.com/chromium/src/+/b0d714461da621694d56f8949545d7da6cb551ea

scottchen@, Could you please take a look and reassign to the right owner if it is not related to your change.
Thanks..!!

Comment 2 by scottchen@chromium.org, Aug 16 2017

Status: WontFix (was: Assigned)
Seems to be a side-effect of how pixel rendering works (the 2-px line's pixels become half pixels, and is being merged with white-pixels above/under it). Marking as wont-fix, since we're not expecting any users to use the page at 33% zoom-out (at that point the texts would not be readable anyway).

Please reopen if this bug appears in an actual use-case.
►

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