Debugging with active breakpoint crashes Powershell session

Prerequisites

• I have written a descriptive issue title.
• I have searched all 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.

Summary

Powershell session crashes in preview extension when attempting to debug a script with active breakpoint in unsaved file. Debugging the same code in a saved file works.

Also occurs when debugging Pester tests, but was able to reproduce the same exception in this simpler demo so I believe it might be the same root cause.

PowerShell Version

Name                           Value
----                           -----
PSVersion                      7.1.3
PSEdition                      Core
GitCommitId                    7.1.3
OS                             Microsoft Windows 10.0.22000
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visual Studio Code Version

1.62.0-insider
b3318bc0524af3d74034b8bb8a64df0ccf35549a
x64

Extension Version

ms-vscode.powershell-preview@2021.11.0

Steps to Reproduce

1. Open a new unsaved file with content $a = 1
2. Place a breakpoint on the line and launch/debug file as normal

Visuals

Repro

Exception

Logs

No response

[JustinGrote]

I can consistently reproduce if you:

1. Start a debug session (I use start interactive session)
2. Run a pester test

I get the same scopes issue. Doesn’t happen if you don’t have a debug session started.

[JustinGrote]

Agreed, @andschwa there should be a broad catch for all otherwise-uncaught pwsh invocation exceptions that logs the exception occurred but doesn’t kill PSES (or at the very worst auto-restarts it)