bionic python3-invoke breaks on hello world equivalent

[Brad Walker]

Please upgrade to 1.3.0.

[brad@x220 bug]$ mkdir /tmp/eyebrow-raise
mkdir: created directory '/tmp/eyebrow-raise'
[brad@x220 bug]$ cd /tmp/eyebrow-raise
[brad@x220 eyebrow-raise]$ cat > tasks.py
from invoke import task

@task
def build(c):
    print("Building!")
[brad@x220 eyebrow-raise]$ inv build
'build' did not receive all required positional arguments!
[brad@x220 eyebrow-raise]$ mkvirtualenv invoke-bug -p $(which python3)
Already using interpreter /usr/bin/python3
Using base prefix '/usr'
New python executable in /home/brad/.virtualenvs/invoke-bug/bin/python3
Not overwriting existing python script /home/brad/.virtualenvs/invoke-bug/bin/python (you must use /home/brad/.virtualenvs/invoke-bug/bin/python3)
Installing setuptools, pkg_resources, pip, wheel...done.
(invoke-bug) [brad@x220 eyebrow-raise]$ pip install invoke
Requirement already satisfied: invoke in /home/brad/.virtualenvs/invoke-bug/lib/python3.6/site-packages (1.3.0)
(invoke-bug) [brad@x220 eyebrow-raise]$ inv build
Building!

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: python3-invoke 0.11.1+dfsg1-1
ProcVersionSignature: Ubuntu 5.0.0-23.24~18.04.1-generic 5.0.15
Uname: Linux 5.0.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: GNOME-Flashback:GNOME
Date: Sun Sep 15 16:10:16 2019
InstallationDate: Installed on 2019-09-14 (0 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: python-invoke
UpgradeStatus: No upgrade log present (probably fresh install)

[Gianfranco Costamagna (costamagnagianfranco)]

Released in Focal 20.04