Azure_rm plugin failure - templating issue in plugin?

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We’re setting up a new project and have come across a surprising failure.

Warning: : Failed to parse inventory with ‘auto’ plugin: Error evaluating filter condition ‘True’ for host [redacted]: The value ‘{% if True %} True {% else %} False {% endif %}’ is not a valid boolean. Valid booleans include: ‘n’, ‘on’, 1, ‘false’, 0, ‘no’, ‘true’, ‘0’, ‘off’, ‘t’, ‘yes’, ‘1’, ‘y’, ‘f’

This seems to indicate to me that the expression in the plugin is being treated a string literal and not executed to return the True value expected.

I note that there’s some conditional logic which might play a part

    from ansible.template import trust_as_template
except ImportError:
    trust_as_template = None
...
conditional = "{{% if {0} %}}true{{% else %}}false{{% endif %}}".format(condition)
            if trust_as_template:
                conditional = trust_as_template(conditional)
            try:
                if boolean(self.templar.template(conditional)):
                    return True
            except Exception as e:
                if boolean(self.get_option('fail_on_template_errors')):
                    raise AnsibleParserError("Error evaluating filter condition '{0}' for host {1}: {2}".format(condition, inventory_hostname, to_native(e)))

So I’m wondering if trust_as_template is failing to import silently, resulting in this failure? I don’t know what self.templar.template is so lose the track here unfortunately.

Our inventory file is simple
development_azure_rm.yml

plugin: azure.azcollection.azure_rm
include_vm_resource_groups:
  - [redacted]
auth_source: env
strict: yes
ansible_user: [redacted]

executed by ansible-playbook -i deploy/inventory/development_azure_rm.yml deploy/deploy.yml --limit="all"

I’d appreciate any insight.

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