1384013 - Attempting to select text/drag often targets the wrong part of the screen

Status: RESOLVED WORKSFORME

(Core :: DOM: Events, defect)

Description

[Brian Birtles (:birtles, Feb 26~ parental leave)]

I'm afraid I don't have any STR for this but a few times in the last few days I've attempted to select text, often in GMail, and the events seem to have been targeted at a completely different part of the screen meaning I either end up selecting different text, or I end up doing a drag and drop.

Unfortunately, if I then try to do the exactly same steps it works.

Comment 1

[Brian Birtles (:birtles, Feb 26~ parental leave)]

Kanru suggests this might be a regression from bug 1351148.

I just hit it again using the following steps:

1. Load https://crash-stats.mozilla.com/signature/?signature=mozalloc_abort%20%7C%20abort%20%7C%20core%3A%3Aresult%3A%3Aunwrap_failed%3CT%3E%20%7C%20style%3A%3Aproperties%3A%3Aanimated_properties%3A%3A%7B%7Bimpl%7D%7D%3A%3Acompute_distance&date=%3E%3D2017-07-18T07%3A27%3A00.000Z&date=%3C2017-07-25T07%3A27%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_sort=-date&page=1#reports
2. Click the first report
3. Go to select the string 'compute_distance' part-way down the page

Result:
I ended up dragging a translucent version of the "Aggregations" tab link from the *previous* page! And then after releasing the mouse, navigating to that page.

So this might not be about selecting content in the wrong part of the page after all but on a different page altogether.

Comment 2

[Ming-Chou Shih [:stone]]

(In reply to Brian Birtles (:birtles) from comment #1)
> Kanru suggests this might be a regression from bug 1351148.
Thanks for reporting this bug.

> 
> I just hit it again using the following steps:
> 
> 1. Load
> https://crash-stats.mozilla.com/signature/
> ?signature=mozalloc_abort%20%7C%20abort%20%7C%20core%3A%3Aresult%3A%3Aunwrap_
> failed%3CT%3E%20%7C%20style%3A%3Aproperties%3A%3Aanimated_properties%3A%3A%7B
> %7Bimpl%7D%7D%3A%3Acompute_distance&date=%3E%3D2017-07-18T07%3A27%3A00.
> 000Z&date=%3C2017-07-25T07%3A27%3A00.
> 000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_colum
> ns=platform&_columns=reason&_columns=address&_columns=install_time&_sort=-
> date&page=1#reports
> 2. Click the first report
> 3. Go to select the string 'compute_distance' part-way down the page
In the step3, do you mean selec the string 'compute_distance' after the first report is loaded?

> 
> Result:
> I ended up dragging a translucent version of the "Aggregations" tab link
> from the *previous* page! And then after releasing the mouse, navigating to
> that page.
> 
> So this might not be about selecting content in the wrong part of the page
> after all but on a different page altogether.
Wondering is it hard to repduce? If not, could you help to capture the screen? I tried to reproduce it but failed. Wondering if I missed something.

Comment 3

[Brian Birtles (:birtles, Feb 26~ parental leave)]

(In reply to Ming-Chou Shih [:stone] from comment #2)
> (In reply to Brian Birtles (:birtles) from comment #1)
> > Kanru suggests this might be a regression from bug 1351148.
> Thanks for reporting this bug.
> 
> > 
> > I just hit it again using the following steps:
> > 
> > 1. Load
> > https://crash-stats.mozilla.com/signature/
> > ?signature=mozalloc_abort%20%7C%20abort%20%7C%20core%3A%3Aresult%3A%3Aunwrap_
> > failed%3CT%3E%20%7C%20style%3A%3Aproperties%3A%3Aanimated_properties%3A%3A%7B
> > %7Bimpl%7D%7D%3A%3Acompute_distance&date=%3E%3D2017-07-18T07%3A27%3A00.
> > 000Z&date=%3C2017-07-25T07%3A27%3A00.
> > 000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_colum
> > ns=platform&_columns=reason&_columns=address&_columns=install_time&_sort=-
> > date&page=1#reports
> > 2. Click the first report
> > 3. Go to select the string 'compute_distance' part-way down the page
> In the step3, do you mean selec the string 'compute_distance' after the
> first report is loaded?

Yes.

> > Result:
> > I ended up dragging a translucent version of the "Aggregations" tab link
> > from the *previous* page! And then after releasing the mouse, navigating to
> > that page.
> > 
> > So this might not be about selecting content in the wrong part of the page
> > after all but on a different page altogether.
> Wondering is it hard to repduce? If not, could you help to capture the
> screen? I tried to reproduce it but failed. Wondering if I missed something.

Yes, it is hard to reproduce. I cannot reproduce it consistently using the same steps.

Comment 4

[Brian Birtles (:birtles, Feb 26~ parental leave)]

This happened to me twice more today -- once while selecting text in Gmail and once while dragging a vertical scrollbar in Gmail. I'll attach a screenshot of the first instance.

Comment 5

[Brian Birtles (:birtles, Feb 26~ parental leave)]

Attachment: Screenshot

Unfortunately this screenshot doesn't show the cursor at the time. It was a  ⃠  cursor position over the text I was trying to select (from right to left). That is, I tried selecting some text, and the cursor appeared in the right place, but I ended up dragging some unknown element from possibly another tab and on a different part of the screen. Very disconcerting.

Comment 6

[Hsin-Yi Tsai (she/her) [:hsinyi]]

Moving 56-status to unaffected as bug 1351148 was backed-out from 56.

Comment 7

[Jim Mathies [:jimm]]

A regression from the event queue work, bug 1390044 tracks turning that on.