'Throw'-ing a terminating error in a script is not handled correctly in Integrated Console

[sburbano]

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

When throwing an exception (terminating error) from a script or command-line, the output in Integrated Console shows some internal stack trace, instead of the actual exception message.

PS>throw "Test"
An error occurred while running the REPL loop:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Microsoft.PowerShell.EditorServices.Utility.PSCommandHelpers.MergePipelineResults(PSCommand psCommand) in D:\a\1\s\src\PowerShellEditorServices\Utility\PSCommandExtensions.cs:line 65
   at Microsoft.PowerShell.EditorServices.Utility.PSCommandHelpers.AddOutputCommand(PSCommand psCommand) in D:\a\1\s\src\PowerShellEditorServices\Utility\PSCommandExtensions.cs:line 51
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Execution.SynchronousPowerShellTask`1.ExecuteNormally(CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Execution\SynchronousPowerShellTask.cs:line 106
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Execution.SynchronousPowerShellTask`1.Run(CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Execution\SynchronousPowerShellTask.cs:line 55
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Execution.SynchronousTask`1.ExecuteSynchronously(CancellationToken executorCancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Execution\SynchronousTask.cs:line 92
--- End of stack trace from previous location ---
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Execution.SynchronousTask`1.get_Result() in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Execution\SynchronousTask.cs:line 60
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Execution.SynchronousTask`1.ExecuteAndGetResult(CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Execution\SynchronousTask.cs:line 109
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Host.PsesInternalHost.InvokePSCommand[TResult](PSCommand psCommand, PowerShellExecutionOptions executionOptions, CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Host\PsesInternalHost.cs:line 376
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Host.PsesInternalHost.InvokePSCommand(PSCommand psCommand, PowerShellExecutionOptions executionOptions, CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Host\PsesInternalHost.cs:line 380
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Host.PsesInternalHost.InvokeInput(String input, CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Host\PsesInternalHost.cs:line 674
   at Microsoft.PowerShell.EditorServices.Services.PowerShell.Host.PsesInternalHost.DoOneRepl(CancellationToken cancellationToken) in D:\a\1\s\src\PowerShellEditorServices\Services\PowerShell\Host\PsesInternalHost.cs:line 636

The release version yields the expected result:

PS>throw "Test"

Exception: Test

PowerShell Version

PS>$PSVersionTable                                                                                                                                                                            

Name                           Value
----                           -----
PSVersion                      7.2.1
PSEdition                      Core
GitCommitId                    7.2.1
OS                             Microsoft Windows 10.0.19042
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

1.64.0-insider (user setup)
ea2afbaf90cb6d9672d8a681e90492d23c687064
x64

Extension Version

ms-vscode.powershell-preview@2021.12.0

Steps to Reproduce

Throw an exception

Visuals

No response

Logs

No response

[JustinGrote]

This should be resolved in the next preview release by PowerShell/PowerShellEditorServices#1651