from_yaml filter failure on focal

[Alexey Bazhin]

1. Create file "test.yaml" with content "test: true"

2. Create local playbook "playbook.yaml"
- hosts: localhost
  connection: local
  gather_facts: no
  tasks:
    - debug:
        msg: "{{ lookup('file', 'test.yaml')|from_yaml }}"

3. Run playbook

ansible-playbook playbook.yaml

Error is:

fatal: [localhost]: FAILED! => {"msg": "Unexpected templating type error occurred on ({{ lookup('file', 'test.yaml')|from_yaml }}): a string or stream input is required"}

On eoan this works fine.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ansible 2.9.6+dfsg-1
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: X-Cinnamon
Date: Fri May 22 21:41:05 2020
PackageArchitecture: all
SourcePackage: ansible
UpgradeStatus: No upgrade log present (probably fresh install)

[Alexey Bazhin (baz-irc)]

I have tried package versions from eoan (ansible, python3-yaml, python3-jinja2) and id didn't helped. So it looks like priblem is with python3.8

[Alexey Bazhin (baz-irc)]

Clean focal install doesn't have the problem. Installing saltstack from their official repo breaks ansible. Closing the ticket.