Regression: Flickering is seen while navigating to other tabs.
Reported by
aiman.an...@etouch.net,
Nov 3 2017
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Issue descriptionChrome Version: 64.0.3257.0 (Official Build)314f01c2122124dafaf99698f5049ee7d1c08140-refs/heads/master@{#513642} (64-bit) OS: Win(7,8,10), Linux(14.04 LTS), Mac(10.12.6, 10.13.1). Test URL: https://www.seoquake.com/welcome/index.html#serp Steps to reproduce: 1.Launch Chrome, go to the above URL. 2.On LHS, browse through different options and observe. Actual Result: Flickering is seen while navigating to other options. Expected Result: Flickering should not be seen while navigating to other options. This is regression issue broken in ‘M-59’ and below per-revision bisect result Using the per-revision bisect providing the bisect results, Good Build: 59.0.3069.0(Revision:463922) Bad Build:59.0.3070.0(Revision:464226) You are probably looking for a change made after 464148 (known good), but no later than 464149 (first known bad). CHANGE-LOG URL: The script might not always return single CL as suspect as some perf builds might get missing due to failure. https://chromium.googlesource.com/chromium/src/+log/24ce4cde5a1d9f21ff63d0560f904dbd2dc46d81..58a80400fbbbddc28a9fb82ca69605e7f520a589 Suspect: https://chromium.googlesource.com/chromium/src/+/24ce4cde5a1d9f21ff63d0560f904dbd2dc46d81 @mathp: 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. Thank You!
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Nov 7 2017
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Nov 8 2017
The Skia roll does indeed seem to be responsible. The flickering is due to the shadow disappearing at certain widths. I'll try to reduce it to a failing static case.
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Nov 8 2017
https://codepen.io/schenney-chromium/pen/eeBVvY At some fractional sizes the shadow disappears. The pen has a missing shadow when viewed at 100% on linux. Zooming makes it disappear; the result is very very sensitive to the exact values.
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Nov 8 2017
Not a P1 if it took 5 revisions to find it, and a glitch in most cases rather than persistent error.
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Nov 9 2017
I've stared at these CLs long enough, calling in the big dogs- I hope one of the Mikes may see something if this Skia roll (from 7 months ago) is truly to blame. Link to the suspect set of changes: https://skia.googlesource.com/skia.git/+log/ac796f880f0a..4ccd862d2940 |
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Comment 1 by ma...@chromium.org
, Nov 3 2017Status: Available (was: Assigned)