Refuses to trash a directory "because" it's not empty

[Teo]

I selected two folders (which contained files) and hit the Delete key. I got the nonsense warning shown in the screenshot:

"Unable to trash file: Directory not empty"

Since when is that a reason for not being able to move a directory to trash???
I have done the same hundreds of times before. Usually, when a folder is not empty, it used to be moved to trash with all its contents without issues.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: nautilus 1:3.6.3-0ubuntu16
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.4
Architecture: i386
Date: Tue Sep 10 23:50:37 2013
GsettingsChanges:
 b'org.gnome.nautilus.window-state' b'geometry' b"'1322x738+202+144'"
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'180'
InstallationDate: Installed on 2010-06-23 (1175 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to raring on 2013-08-10 (31 days ago)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

[Ads20000 (ads20000)]

I can't reproduce this bug on Files 3.26 on Ubuntu 17.10 so I'm assuming this bug is fixed.