Invoke-ScriptAnalyzer: An item with the same key has already been added. What is the proper syntax?

I seem to be receiving a rule-less error whenever running PSScriptAnalyzer with default settings against a PowerShell script containing the following code block.

Environment

MacOS 10.15.4 PowerShell 7 LTS for MacOS PSScriptAnalyzer 1.19.0

Code

$result = Invoke-Command -ComputerName $Computername -Credential $RemotingCred -Authentication Negotiate -ScriptBlock {
    $output=@()
    foreach ($item in $list) {
        $out = [PSCustomObject]@{
                    Property1   = $item.Property1
                    Property2   = $item.Property2
               }
        $output += $out
    }
    return $output
}

Command

Invoke-ScriptAnalyzer -path ./test.ps1

Expected Output

none

Actual Output

Invoke-ScriptAnalyzer: An item with the same key has already been added. Key: output

Question

What is the proper PowerShell syntax to prevent this error from generating? Or, which Rule can I ignore to suppress it? The code executes fine, just for the record 😃

Thanks!

[SydneyhSmith]

@thomasrayner currently we are targeting a 1.19.1 release in about two weeks (likely the last week in July) however this is truly not a promise/commitment–just a good faith estimate…we are hoping to get another bug fix into this release, and then prioritize the release amongst other commitments

[rjmholt]

I’m in favour of a 1.19.1 release