[e10s] list of options in <select> doesn't scroll smoothly when I click on scrollbar




Layout: Form Controls
2 years ago
a year ago


(Reporter: arni2033, Unassigned)


(Blocks: 1 bug, {regression})

47 Branch
Dependency tree / graph

Firefox Tracking Flags

(firefox50 wontfix, firefox51 wontfix, firefox52 fix-optional, firefox53 fix-optional, firefox54 fix-optional)




2 years ago
>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
1. Open attachment 8557479 [details]
2. Click on <select> to open list of options
3. Hover mouse over the vertical scrollbar, but not on the scrollbar thumb
4. Click

AR:  List of options teleports to new position
ER:  List of options should smoothly scroll to new position. References of that behavior:
  1) non-e10s
  2) both e10s and non-e10s if in Step 4 I rotate mouse wheel (My mouse wheel is configured
     to "scroll by 1 screen", so I expect the same action for (2) and Step 4).
  3) both e10s and non-e10s if in Step 4 I double-click or triple-click instead of just clicking
  4) both e10s and non-e10s if in Step 4 I hold left mouse button and list scrolls automatically

You should check regression range.

This is regression from bug 1235478. Regression range:
> https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=978349072992b565123bcd97e0778abaa7a67256&tochange=66252157547f3f4e0b9ad9fb3b0b96d6df5938fe@ Hiroyuki Ikezoe (:hiro):
It seems that this is a regresion caused by your change. Please have a look.


2 years ago
No longer blocks: 1277113


2 years ago
Component: Untriaged → Layout: Form Controls
Product: Firefox → Core


2 years ago
Blocks: 1154677
No longer blocks: 1235478
Depends on: 1235478
Keywords: regressionwindow-wanted
Version: Trunk → 47 Branch
status-firefox50: --- → wontfix
status-firefox51: --- → affected
status-firefox52: --- → affected
status-firefox53: --- → affected
Flags: needinfo?(hikezoe)
Is the regression range correct?  I can see the same behavior between today's nightly and 2016-01-01 nightly.
Flags: needinfo?(hikezoe)
Regression range seems a bit fishy to me too. I would double check it before investigating further.
I tried re-bisecting this and was definitely able to reproduce the jankiness reported in this bug, but I've still had a difficult time bisecting it down to a culprit commit. I can also reproduce the janky scrolling prior to bug 1235478 landing.
status-firefox51: affected → wontfix
status-firefox52: affected → fix-optional
status-firefox53: affected → fix-optional
status-firefox54: --- → fix-optional
Priority: -- → P3
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