1402252 - [e10s] document.execCommand("copy") does not work for onchange event

Status: NEW

(Core :: DOM: Editor, defect, P3)

Description

[sanat.gersappa]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20170921220243

Steps to reproduce:

Attach an event handler to the onchange event of a select. In the event handler, do a ddocument.execCommand("copy"). 


Actual results:

Console error - document.execCommand(‘cut’/‘copy’) was denied because it was not called from inside a short running user-generated event handler. 


Expected results:

the execCommand should have executed without error just like it works for an onclick event.

Comment 1

[Olli Pettay [:smaug][[e-mail]]]

Is this a regression?

Comment 2

[sanat.gersappa]

(In reply to Olli Pettay [:smaug] from comment #1)
> Is this a regression?

Possible. Since it works fine in FF 55.

Comment 3

[Tooru Fujisawa [:arai]]

looks like e10s specific issue.
it works on 58 and 55 non-e10s, and doesn't work on e10s 55.

Comment 4

[Tooru Fujisawa [:arai]]

Attachment: testcase

here's testcase.
changing select value triggers warning in console, only on e10s.