`pwsh.exe` `$env:PSModulePath` Retained In 5.1 Console When `code.cmd` Called From `pwsh.exe`

[mattcargile]

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.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

Issue found when Import-PowerShellDataFile was not recognized because Microsoft.PowerShell.Utility 7.0.0 is loaded in 5.1 Integrated Console. The libraries version is incorrect within the Visual Studio Code Host ( e.g. $Host ) on powershell.exe 5.1 when user launches code.cmd from pwsh.exe. The $env:PSModulePath is retained from the parent pwsh.exe session and causes issues in the powershell.exe session within code.exe. powershell.exe on it's own purges the pwsh.exe paths from the module path ( e.g. C:\Program Files\PowerShell\Modules and C:\program files\powershell\7\Modules ). See this comment on the code links to the PowerShell code base.

Modules like Terminal-Icons error out. I still need to use this version due to SOAP endpoints like SQL Server Reporting Services ( e.g. ReportingServicesTools module ).

PowerShell Version

PS> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.1.18362.1171
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.18362.1171
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Visual Studio Code Version

PS> code --version
1.65.2
c722ca6c7eed3d7987c0d5c3df5c45f6b15e77d1
x64

Extension Version

PS> code --list-extensions --show-versions | Select-String powershell7:58  

ms-vscode.powershell-preview@2022.3.0

Steps to Reproduce

Set Integrated Console in VS Code to Windows Powershell (x64). Close all instances of VS Code.

pwsh
code file.ps1

Execute below in VS Code Integrated Terminal

Get-Command 'Import-PowershellDataFile'
Get-Command -Module 'Microsoft.PowerShell.Utility' | Select-Object -Unique -Property Version

Visuals

N/A

Logs

Terminal Log Output

DEBUG: Logging started
DEBUG: Beginning EndProcessing block
VERBOSE: Removing PSReadLine        
DEBUG: Creating host configuration  
DEBUG: Determining REPL kind
DEBUG: REPL configured as PSReadLine
DEBUG: Configuring LSP transport  
DEBUG: Configuring debug transport
DEBUG: Session file writer created
VERBOSE: Adding AssemblyResolve event handler for dependency loading
VERBOSE: Loading EditorServices
VERBOSE: PID: 37124
VERBOSE: 
== Build Details ==
- Editor Services version: 3.1.5
- Build origin:            Release
- Build commit:            6e602caf43c37381f42fc4d47b680a9d96271949
- Build time:              3/10/2022 12:00:00 AM
VERBOSE: 
== Host Startup Configuration Details ==
 - Host name:                 Visual Studio Code Host
 - Host version:              2022.3.0
 - Host profile ID:           Microsoft.VSCode
 - PowerShell host type:      System.Management.Automation.Internal.Host.InternalHost

 - REPL setting:              PSReadLine
 - Session details path:
c:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\sessions\PSES-VSCode-35772-736086
 - Bundled modules path:      c:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules
 - Additional modules:        PowerShellEditorServices.VSCode
 - Feature flags:

 - Log path:
c:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\logs\1648066708-6efde32c-da6d-479b-a9dc-f595fa3e5cae16480667 
05294\EditorServices.log
 - Minimum log level:         Diagnostic

 - Profile paths:
   + AllUsersAllHosts:       C:\Windows\System32\WindowsPowerShell\v1.0\profile.ps1
   + AllUsersCurrentHost:    C:\Windows\System32\WindowsPowerShell\v1.0\Microsoft.VSCode_profile.ps1
   + CurrentUserAllHosts:    C:\Users\user\OneDrive - Organization\Documents\WindowsPowerShell\profile.ps1
   + CurrentUserCurrentHost: C:\Users\user\OneDrive - Organizaton
\Documents\WindowsPowerShell\Microsoft.VSCode_profile.ps1
DEBUG: Loaded 'Microsoft.PowerShell.Commands.Diagnostics, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Microsoft.PowerShell.Commands.Diagnostics\v4.0_3.0.0.0__31bf3856ad364e35\Microsoft.PowerSh 
ell.Commands.Diagnostics.dll'
DEBUG: Loaded 'System.Configuration.Install, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration.Install\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.Install.d 
ll'
DEBUG: Loaded 'Microsoft.PowerShell.Commands.Utility, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Microsoft.PowerShell.Commands.Utility\v4.0_3.0.0.0__31bf3856ad364e35\Microsoft.PowerShell. 
Commands.Utility.dll'
DEBUG: Loaded 'Microsoft.PowerShell.Commands.Management, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Microsoft.PowerShell.Commands.Management\v4.0_3.0.0.0__31bf3856ad364e35\Microsoft.PowerShe 
ll.Commands.Management.dll'
DEBUG: Loaded 'Microsoft.WSMan.Management, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Microsoft.WSMan.Management\v4.0_3.0.0.0__31bf3856ad364e35\Microsoft.WSMan.Management.dll'  
DEBUG: Assembly resolve event fired for Microsoft.PowerShell.Security.resources, Version=3.0.0.0, Culture=en-US, 
PublicKeyToken=31bf3856ad364e35
DEBUG: Assembly resolve event fired for Microsoft.PowerShell.Security.resources, Version=3.0.0.0, Culture=en-US, 
PublicKeyToken=31bf3856ad364e35
DEBUG: Assembly resolve event fired for Microsoft.PowerShell.EditorServices, Version=3.1.5.0, Culture=neutral, PublicKeyToken=null     
DEBUG: Assembly resolve event fired for Microsoft.WSMan.Management.resources, Version=3.0.0.0, Culture=en-US, 
PublicKeyToken=31bf3856ad364e35
DEBUG: Loading Microsoft.PowerShell.EditorServices, Version=3.1.5.0, Culture=neutral, PublicKeyToken=null from PSES dependency dir 
into LoadFile context
DEBUG: Assembly resolve event fired for Microsoft.WSMan.Management.resources, Version=3.0.0.0, Culture=en-US, 
PublicKeyToken=31bf3856ad364e35
DEBUG: Loaded 'Microsoft.PowerShell.EditorServices, Version=3.1.5.0, Culture=neutral, PublicKeyToken=null' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Microsoft.Power 
Shell.EditorServices.dll'
DEBUG: Loaded 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\netstandard\v4.0_2.0.0.0__cc7b13ffcd2ddd51\netstandard.dll'
DEBUG: Assembly resolve event fired for Microsoft.Extensions.Logging.Abstractions, Version=6.0.0.0, Culture=neutral, 
PublicKeyToken=adb9793829ddae60
DEBUG: Loading Microsoft.Extensions.Logging.Abstractions, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 from PSES  
dependency dir into LoadFile context
VERBOSE: 
== Console Details ==
 - Console input encoding: OEM United States
 - Console output encoding: OEM United States
 - PowerShell output encoding: US-ASCII
DEBUG: Loaded 'Microsoft.Extensions.Logging.Abstractions, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Microsoft.Exten 
sions.Logging.Abstractions.dll'
VERBOSE: 
== PowerShell Details ==
- PowerShell version: 5.1.18362.1171
- Language mode:      FullLanguage
DEBUG: Loaded 'System.Runtime.InteropServices.RuntimeInformation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'   
from
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.InteropServices.RuntimeInformation\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Ru 
ntime.InteropServices.RuntimeInformation.dll'
VERBOSE: 
== Environment Details ==
 - OS description:  Microsoft Windows 10.0.18363
 - OS architecture: X64
 - Process bitness: 64
DEBUG: Checking that .NET Framework version is at least 4.6.1
VERBOSE: .NET registry version: 528040
VERBOSE: Updated PSModulePath to: 'C:\Users\user\OneDrive - Organization\Documents\PowerShell\Modules;C:\Program 
Files\PowerShell\Modules;c:\program files\powershell\7\Modules;C:\Program
Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules;C:\Program Files\Veeam\Backup and
Replication\Explorers\Exchange\;C:\Program Files\Veeam\Backup and Replication\Explorers\SharePoint\;C:\Program Files\Veeam\Backup and  
Replication\Explorers\SQL\;C:\Program Files\Veeam\Backup and Replication\Explorers\ActiveDirectory\;C:\Program Files\Veeam\Backup and  
Replication\Explorers\Oracle\;c:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules'
DEBUG: Validating configuration
VERBOSE: Loading PowerShell Editor Services
VERBOSE: Starting EditorServices
DEBUG: Assembly resolve event fired for Serilog, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10
DEBUG: Loading Serilog, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10 from PSES dependency dir into LoadFile       
context
DEBUG: Loaded 'Serilog, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Serilog.dll'    
DEBUG: Assembly resolve event fired for Serilog.Sinks.Async, Version=1.5.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10
DEBUG: Loading Serilog.Sinks.Async, Version=1.5.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10 from PSES dependency dir into    
LoadFile context
DEBUG: Loaded 'Serilog.Sinks.Async, Version=1.5.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Serilog.Sinks.A 
sync.dll'
DEBUG: Assembly resolve event fired for Microsoft.Extensions.Logging, Version=6.0.0.0, Culture=neutral, 
PublicKeyToken=adb9793829ddae60
DEBUG: Loading Microsoft.Extensions.Logging, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 from PSES dependency    
dir into LoadFile context
DEBUG: Loaded 'Microsoft.Extensions.Logging, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Microsoft.Exten 
sions.Logging.dll'
DEBUG: Assembly resolve event fired for Serilog.Extensions.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10  
DEBUG: Loading Serilog.Extensions.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10 from PSES dependency dir 
into LoadFile context
DEBUG: Loaded 'Serilog.Extensions.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Serilog.Extensi 
ons.Logging.dll'
DEBUG: Assembly resolve event fired for Microsoft.Extensions.Logging.Abstractions, Version=2.0.0.0, Culture=neutral, 
PublicKeyToken=adb9793829ddae60
DEBUG: Loading Microsoft.Extensions.Logging.Abstractions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 from PSES  
dependency dir into LoadFile context
DEBUG: Assembly resolve event fired for Serilog.Sinks.File, Version=5.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10
DEBUG: Loading Serilog.Sinks.File, Version=5.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10 from PSES dependency dir into 
LoadFile context
DEBUG: Loaded 'Serilog.Sinks.File, Version=5.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Serilog.Sinks.F 
ile.dll'
DEBUG: Assembly resolve event fired for Microsoft.Extensions.Options, Version=6.0.0.0, Culture=neutral, 
PublicKeyToken=adb9793829ddae60
DEBUG: Loading Microsoft.Extensions.Options, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 from PSES dependency    
dir into LoadFile context
DEBUG: Loaded 'Microsoft.Extensions.Options, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\Microsoft.Exten 
sions.Options.dll'
DEBUG: Assembly resolve event fired for Microsoft.Extensions.Logging, Version=2.0.0.0, Culture=neutral, 
PublicKeyToken=adb9793829ddae60
DEBUG: Loading Microsoft.Extensions.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 from PSES dependency    
dir into LoadFile context
DEBUG: Assembly resolve event fired for OmniSharp.Extensions.LanguageServer, Version=0.19.0.0, Culture=neutral, 
PublicKeyToken=6d868dff454e6022
DEBUG: Loading OmniSharp.Extensions.LanguageServer, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022 from PSES       
dependency dir into LoadFile context
DEBUG: Loaded 'OmniSharp.Extensions.LanguageServer, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\OmniSharp.Exten 
sions.LanguageServer.dll'
DEBUG: Assembly resolve event fired for OmniSharp.Extensions.JsonRpc, Version=0.19.0.0, Culture=neutral, 
PublicKeyToken=6d868dff454e6022
DEBUG: Loading OmniSharp.Extensions.JsonRpc, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022 from PSES dependency   
dir into LoadFile context
DEBUG: Loaded 'OmniSharp.Extensions.JsonRpc, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\OmniSharp.Exten 
sions.JsonRpc.dll'
DEBUG: Assembly resolve event fired for MediatR, Version=8.0.0.0, Culture=neutral, PublicKeyToken=bb9a41a5e8aaa7e2
DEBUG: Loading MediatR, Version=8.0.0.0, Culture=neutral, PublicKeyToken=bb9a41a5e8aaa7e2 from PSES dependency dir into LoadFile       
context
DEBUG: Loaded 'MediatR, Version=8.0.0.0, Culture=neutral, PublicKeyToken=bb9a41a5e8aaa7e2' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\MediatR.dll'    
DEBUG: Assembly resolve event fired for OmniSharp.Extensions.LanguageProtocol, Version=0.19.0.0, Culture=neutral, 
PublicKeyToken=6d868dff454e6022
DEBUG: Loading OmniSharp.Extensions.LanguageProtocol, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022 from PSES     
dependency dir into LoadFile context
DEBUG: Loaded 'OmniSharp.Extensions.LanguageProtocol, Version=0.19.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022' from 
'C:\Users\user\.vscode\extensions\ms-vscode.powershell-preview-2022.3.0\modules\PowerShellEditorServices\bin\Common\OmniSharp.Exten 
sions.LanguageProtocol.dll'
DEBUG: Loaded 'Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' from 
'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Newtonsoft.Json\v4.0_11.0.0.0__30ad4fe6b2a6aeed\Newtonsoft.Json.dll'
DEBUG: Creating/running editor services
DEBUG: Creating startup info object
VERBOSE: Starting server, deregistering host logger and registering shutdown listener
=====> PowerShell Preview Integrated Console v2022.3.0 <=====

Import-PowerShellDataFile : The term 'Import-PowerShellDataFile' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:210 char:33
+         $hash.Add($_.Basename, (Import-PowerShellDataFile $_.FullName ...
+                                 ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Import-PowerShellDataFile:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 
Import-PowerShellDataFile : The term 'Import-PowerShellDataFile' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:196 char:22
+         $colorData = Import-PowerShellDataFile $_.FullName
+                      ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Import-PowerShellDataFile:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 
Index operation failed; the array index evaluated to null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:197 char:9
+         $hash[$colorData.Name] = $colorData
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArrayIndex
 
Index operation failed; the array index evaluated to null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:198 char:9
+         $hash[$colorData.Name].Types.Directories[''] = $colorReset
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArrayIndex
 
Index operation failed; the array index evaluated to null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:199 char:9
+         $hash[$colorData.Name].Types.Files['']       = $colorReset
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArrayIndex
 
Import-PowerShellDataFile : The term 'Import-PowerShellDataFile' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:53 char:34
+                         $theme = Import-PowerShellDataFile $item.Full ...
+                                  ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Import-PowerShellDataFile:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 
Exception calling "ContainsKey" with "1" argument(s): "Key cannot be null.
Parameter name: key"
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:58 char:33
+ ...           if (-not $script:colorSequences.ContainsKey($theme.Name)) {
+                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : ArgumentNullException
 
You cannot call a method on a null-valued expression.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:63 char:29
+ ...             $theme.Types.Directories.WellKnown.GetEnumerator().ForEac ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
You cannot call a method on a null-valued expression.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:67 char:29
+ ...                $theme.Types.Files.WellKnown.GetEnumerator().ForEach({
+                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
You cannot call a method on a null-valued expression.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:71 char:29
+ ...             $theme.Types.Files.GetEnumerator().Where({$_.Name -ne 'We ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
Index operation failed; the array index evaluated to null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:76 char:25
+ ...              $script:userThemeData.Themes.$Type[$theme.Name] = $theme
+                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArrayIndex
 
Save-Theme : Cannot bind argument to parameter 'Theme' because it is null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:77 char:43
+                         Save-Theme -Theme $theme -Type $Type
+                                           ~~~~~~
    + CategoryInfo          : InvalidData: (:) [Save-Theme], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Save-Theme
 
Import-PowerShellDataFile : The term 'Import-PowerShellDataFile' is not recognized as the name of a cmdlet, function, script file, or 
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:53 char:34
+                         $theme = Import-PowerShellDataFile $item.Full ...
+                                  ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Import-PowerShellDataFile:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 
Index operation failed; the array index evaluated to null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:76 char:25
+ ...              $script:userThemeData.Themes.$Type[$theme.Name] = $theme
+                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArrayIndex
 
Save-Theme : Cannot bind argument to parameter 'Theme' because it is null.
At C:\Program Files\WindowsPowerShell\Modules\Terminal-Icons\0.9.0\Terminal-Icons.psm1:77 char:43
+                         Save-Theme -Theme $theme -Type $Type
+                                           ~~~~~~
    + CategoryInfo          : InvalidData: (:) [Save-Theme], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Save-Theme
 
 user    ~    ﮫ0ms⠀                                                                  powershell   98  15:18:46  

Attached are the corresponding logs files.
StartEditorServices.log
vscode-powershell.log
EditorServices.log

[andyleejordan]

I can't repro this:

I was also able to install and import the linked Terminal-Icons module.

Do you have WMF 5.1 installed?

[mattcargile]

Really! Wow. No I never installed WMF 5.1. I assumed all that came with Windows 10. Is there something I am missing by not explicitly installing it?

EDIT: Ahhh, I see you have a more recent minor version of 5.1.

[mattcargile]

Oh, is it my Windows Version? Are you on v1909 of Windows?

[andyleejordan]

This Windows is Version 21H2, OS Build 22000.556. Do you have any updates available?

[mattcargile]

So I tried elevating code.cmd and it worked then ( e.g. it could find the [scriptblock] defined function ). I'm having these issues on a company owned machine so I'm limited on upgrades. I'd have to push to get it.

Do you always run code from an Elevated process?

[mattcargile]

Oh, part of the issue is that it is loading v7 of Microsoft.PowerShell.Utility in a non-elevated copy of code.cmd ( e.g. gcm -module 'Microsoft.PowerShell.Utility' )