When the built-in `$null` was watched its value was incorrect

[thegraffix]

Prerequisites

• I have written a descriptive issue title.
• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with the extension itself and does not reproduce in a standalone PowerShell instance.
• I have verified that I am using the latest version of Visual Studio Code and the PowerShell extension.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

The debugging WATCH pane shows $null: ""

• The way $null is represented makes it difficult to distinguish between an empty string value $MyStringVar = "" vs an uninitialzed variable $VarThatDoesNotExist.
• I'm not certain if this is VSCode or the PowerShell extension

PowerShell Version

PS C:\> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.3.9
PSEdition                      Core
GitCommitId                    7.3.9
OS                             Microsoft Windows 10.0.19045
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0, 5.0, 5.1.10032.0, 6.0.0, 6.1.0, 6.2.0, 7.0.0, 7.1.0, 7.2.0, 7.3.9}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visual Studio Code Version

PS C:\> code --version
1.84.0
d037ac076cee195194f93ce6fe2bdfe2969cc82d
x64

Extension Version

PS C:\> code --list-extensions --show-versions | Select-String powershell

ms-vscode.powershell@2023.8.0

Steps to Reproduce

Add $null to the debugging WATCH list.

Visuals

No response

Logs

No response

[SydneyhSmith]

Thanks @thegraffix for the bug report