Azure Powershell v4 update ignores 'Latest installed version' setting

[stephens336]

Required Information

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Question, Bug, or Feature?
Type: Bug

Enter Task Name: Azure PowerShell

list here (V# not needed): 4
https://github.com/Microsoft/azure-pipelines-tasks/tree/master/Tasks

Environment

Azure DevOps Services

• Agent - Hosted or Private: Hosted

  • If using Hosted agent, provide agent queue name: Hosted VS2017

Issue Description

An update to v4 version of the task made 18 days ago added validation for the Azure Powershell Version that ignores the 'Latest installed version' setting.

Relevant commit: d631201

If Latest installed version is selected and I try to save the build definition, I get this error:
The pipeline is not valid. Job Job_1: Step input 'CustomTargetAzurePs' with value '' does not satisfy 'isMatch(value, '^[0-9]+\.[0-9]+\.[0-9]+$','Multiline')': Enter valid Azure PowerShell Version

If I change it to specify the version, then entering 1.0.0 works.

Task logs

There is no task log. The error occurs when saving a build definition.

Troubleshooting

Checkout how to troubleshoot failures and collect debug logs: https://docs.microsoft.com/en-us/vsts/build-release/actions/troubleshooting

Error logs

The pipeline is not valid. Job Job_1: Step input 'CustomTargetAzurePs' with value '' does not satisfy 'isMatch(value, '^[0-9]+\.[0-9]+\.[0-9]+$','Multiline')': Enter valid Azure PowerShell Version

[20shivangi]

It is resolved in this PR : #10432