1265254 - Dragged selection of text includes a completely unrelated icon

Status: RESOLVED WORKSFORME

(Core :: Widget: Gtk, defect, P3)

Description

[Thomas Lange]

Attachment: Screencast.ogv

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160412225428

Steps to reproduce:

Select and drag any text on a website.


Actual results:

A completely unrelated icon is shown beside the dragged selection.

See the attached video, it might be helpful to lower the speed (e.g. with "mplayer -fps 8".

The icon in my case is the Arch Linux icon which is normally shown in the Xfce panel.

The bug occurs with Firefox 45.0.2 on Arch Linux (GTK3 enabled), version 3.20.3.
I could not reproduce it with a GTK2 build of Firefox.


Expected results:

Only the selected text should be shown.

Comment 1

[Thomas Lange]

The testcase shown in the video is from https://bugzilla.mozilla.org/show_bug.cgi?id=1265249.

Comment 2

[Jan Alexander Steffens [:heftig]]

I suspect this is related to bug 1263791.

Do you get any GLib-CRITICAL messages from Firefox's stderr? They might also get captured in the journal on your system.

Comment 3

[Thomas Lange]

No, I do not see related output, neither in stderr nor in the systemd journal.

Tested Firefox Nightly with a clean profile: Same problem, so the Arch Linux package is not the culprit
Tested downgrading GTK+ to 3.18.9: Bug is not occurring
Tested on my Laptop with Intel graphic card: Bug is not occurring

It looks like this bug only occurs when using GTK+ 3.20 and the OSS radeon driver.

Comment 4

[Thomas Lange]

This issue has been fixed in GTK+ [1], see also the upstream bug report. [2] Version 3.22.9 will include the patch.

[1] https://git.gnome.org/browse/gtk+/commit/?id=9029bc0f
[2] https://bugzilla.gnome.org/show_bug.cgi?id=778203