Setting attribute metadata::gedit-encoding not supported

[dino99]

Have written a couple sentences with gedit, and then called the printer.
That error has been displayed into the terminal:

 (gedit:22402): WARNING **: Set document metadata failed: Setting attribute metadata::gedit-encoding not supported

Spell-checker was enabled.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gedit 3.22.1-1ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8
Uname: Linux 4.12.0-12-generic x86_64
ApportVersion: 2.20.6-0ubuntu6
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Aug 21 15:02:49 2017
EcryptfsInUse: Yes
SourcePackage: gedit
UpgradeStatus: No upgrade log present (probably fresh install)

[dino99 (9d9)]

Also seen on Bionic (gedit 3.28)

oem@ubuntu:~$ sudo gedit /etc/default/grub
[sudo] password for oem:

** (gedit:5355): WARNING **: 13:47:44.894: Set document metadata failed: Setting attribute metadata::gedit-spell-language not supported

** (gedit:5355): WARNING **: 13:47:44.894: Set document metadata failed: Setting attribute metadata::gedit-encoding not supported

** (gedit:5355): WARNING **: 13:47:54.587: Set document metadata failed: Setting attribute metadata::gedit-position not supported

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.