Import-Module -Scope Local -Force in nested scripts removes the module from outer scripts

Prerequisites

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• Make sure you are able to repro it on the latest released version
• Search the existing issues.
• Refer to the FAQ.
• Refer to Differences between Windows PowerShell 5.1 and PowerShell.

Steps to reproduce

When using Import-Module -Scope Local in nested scripts, the module gets removed from the calling script after calling a script which also contains Import-Module -Scope Local for the same module.

MyModule.psm1 contents:

function Test-Something
{
    Write-Host "Test-Something called"
}

OuterScript.ps1 contents:

import-module -Scope Local -Force .\MyModule.psm1

Test-Something

.\InnerScript.ps1

Test-Something

InnerScript.ps1 contents:

import-module -Scope Local -Force .\MyModule.psm1

Write-Host "In InnerScript.ps1, module imported."

Expected behavior

PS D:\Source\Powershell\ImportModuleRepro> .\OuterScript.ps1
Test-Something called
In InnerScript.ps1, module imported.
Test-Something called

Actual behavior

PS D:\Source\Powershell\ImportModuleRepro> .\OuterScript.ps1
Test-Something called
In InnerScript.ps1, module imported.
Test-Something: D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1:7
Line |
   7 |  Test-Something
     |  ~~~~~~~~~~~~~~
     | The term 'Test-Something' is not recognized as a name of a cmdlet, function, script file, or executable program. Check the spelling of the name, or if a path was included, verify that the path is correct
     | and try again.

Error details

PS D:\Source\Powershell\ImportModuleRepro> get-error

Exception             :
    Type        : System.Management.Automation.CommandNotFoundException
    ErrorRecord :
        Exception             :
            Type    : System.Management.Automation.ParentContainsErrorRecordException
            Message : The term 'Test-Something' is not recognized as a name of a cmdlet, function, script file, or executable program.
                      Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
            HResult : -2146233087
        TargetObject          : Test-Something
        CategoryInfo          : ObjectNotFound: (Test-Something:String) [], ParentContainsErrorRecordException
        FullyQualifiedErrorId : CommandNotFoundException
        InvocationInfo        :
            ScriptLineNumber : 7
            OffsetInLine     : 1
            HistoryId        : 9
            ScriptName       : D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1
            Line             : Test-Something
            PositionMessage  : At D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1:7 char:1
                               + Test-Something
                               + ~~~~~~~~~~~~~~
            PSScriptRoot     : D:\Source\Powershell\ImportModuleRepro
            PSCommandPath    : D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1
            InvocationName   : Test-Something
            CommandOrigin    : Internal
        ScriptStackTrace      : at <ScriptBlock>, D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1: line 7
                                at <ScriptBlock>, <No file>: line 1
    CommandName : Test-Something
    TargetSite  :
        Name          : LookupCommandInfo
        DeclaringType : System.Management.Automation.CommandDiscovery, System.Management.Automation, Version=7.3.6.500, Culture=neutral, PublicKeyToken=31bf3856ad364e35
        MemberType    : Method
        Module        : System.Management.Automation.dll
    Message     : The term 'Test-Something' is not recognized as a name of a cmdlet, function, script file, or executable program.
                  Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
    Data        : System.Collections.ListDictionaryInternal
    Source      : System.Management.Automation
    HResult     : -2146233087
    StackTrace  :
   at System.Management.Automation.CommandDiscovery.LookupCommandInfo(String commandName, CommandTypes commandTypes, SearchResolutionOptions searchResolutionOptions, CommandOrigin commandOrigin,
ExecutionContext context)
   at System.Management.Automation.ExecutionContext.CreateCommand(String command, Boolean dotSource)
   at System.Management.Automation.PipelineOps.AddCommand(PipelineProcessor pipe, CommandParameterInternal[] commandElements, CommandBaseAst commandBaseAst, CommandRedirection[] redirections, ExecutionContext
context)
   at System.Management.Automation.PipelineOps.InvokePipeline(Object input, Boolean ignoreInput, CommandParameterInternal[][] pipeElements, CommandBaseAst[] pipeElementAsts, CommandRedirection[][]
commandRedirections, FunctionContext funcContext)
   at System.Management.Automation.Interpreter.ActionCallInstruction`6.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
TargetObject          : Test-Something
CategoryInfo          : ObjectNotFound: (Test-Something:String) [], CommandNotFoundException
FullyQualifiedErrorId : CommandNotFoundException
InvocationInfo        :
    ScriptLineNumber : 7
    OffsetInLine     : 1
    HistoryId        : 9
    ScriptName       : D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1
    Line             : Test-Something
    PositionMessage  : At D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1:7 char:1
                       + Test-Something
                       + ~~~~~~~~~~~~~~
    PSScriptRoot     : D:\Source\Powershell\ImportModuleRepro
    PSCommandPath    : D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1
    InvocationName   : Test-Something
    CommandOrigin    : Internal
ScriptStackTrace      : at <ScriptBlock>, D:\Source\Powershell\ImportModuleRepro\OuterScript.ps1: line 7
                        at <ScriptBlock>, <No file>: line 1

Environment data

PS D:\Source\Powershell\ImportModuleRepro> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.3.6
PSEdition                      Core
GitCommitId                    7.3.6
OS                             Microsoft Windows 10.0.19045
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visuals

No response

Beginne mit der Ausführung der gemeldeten Reproduktion mit OuterScript.ps1, InnerScript.ps1 und MyModule.psm1 unter Verwendung von Import-Module -Scope Local -Force. Verfolge, wie sich der verschachtelte Import auf die Verfügbarkeit von Befehlen im äußeren Skript auswirkt. Als abgeschlossen gilt die Aufgabe, wenn der abschließende Aufruf von Test-Something erfolgreich ist, das gemeldete Verhalten des inneren Skripts beibehalten wird und für dieses Szenario eine Regressionstestabdeckung hinzugefügt wurde.