Powershell: Select-Object default output formatting is situationally broken

[mklement0]

The test command below _should_ yield:

Length
------
     3

but currently yields:

@{Length=3}

The problem may be specific to [string] input (a rare scenario) - not sure what the underlying pattern is.

Steps to reproduce

'one' | Select-Object Length | Out-String | Should -not -match '@'

Expected behavior

The test should pass.

Actual behavior

The test fails.

Expected regular expression '@' to not match '@{Length=3}
', but it did match.

Environment data

PowerShell Core 7.0.0-preview.4

[SteveL-MSFT]

This is a regression from WinPS5.1

[iSazonov]

 'one' | Select-Object Length

Length
------
     3

> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      6.2.3
PSEdition                      Core
GitCommitId                    6.2.3
OS                             Microsoft Windows 10.0.17763
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[SteveL-MSFT]

Ok, that narrows it down a bit.

[msftbot[bot]]

:tada:This issue was addressed in #10765, which has now been successfully released as v7.0.0-preview.5.:tada:

Handy links:

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