Foreach-Object -Parallel [scriptblock]::Create("$Using:SomeVariable") Does not work on pwsh 7.2.* #17571
Description
Prerequisites
- Write a descriptive title.
- 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
Below are two snippets demonstrating seemingly identical behavior, however the bottom snippet does not work.
# This Works
$VariableOutsideParallel = 'something'
1..1 | ForEach-Object -Parallel {
Write-Host $Using:VariableOutsideParallel
}# This does NOT on 7.2.0+ (But does on 7.1.*)
$VariableOutsideParallel = 'something'
[scriptblock]$SB = {
Write-Host $Using:VariableOutsideParallel
}
1..1 | ForEach-Object -Parallel $SBExpected behavior
PS> $VariableOutsideParallel = 'something'
PS> [scriptblock]$SB = {
Write-Host $Using:VariableOutsideParallel
}
PS> 1..1 | ForEach-Object -Parallel $SB
somethingActual behavior
PS> $VariableOutsideParallel = 'something'
PS> [scriptblock]$SB = {
Write-Host $Using:VariableOutsideParallel
}
PS> 1..1 | ForEach-Object -Parallel $SB
InvalidOperation:
Line |
2 | Write-Host $Using:VariableOutsideParallel
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| A Using variable cannot be retrieved. A Using variable can be used only with Invoke-Command, Start-Job, or InlineScript in the script workflow. When it is used with Invoke-Command, the Using variable is valid only if the script block is invoked on a remote computer.Error details
PS> Get-Error
Exception :
Type : System.Management.Automation.RuntimeException
ErrorRecord :
Exception :
Type : System.Management.Automation.ParentContainsErrorRecordException
Message : A Using variable cannot be retrieved. A Using variable can be used only with Invoke-Command,
Start-Job, or InlineScript in the script workflow. When it is used with Invoke-Command, the Using variable is valid
only if the script block is invoked on a remote computer.
HResult : -2146233087
CategoryInfo : InvalidOperation: (:) [], ParentContainsErrorRecordException
FullyQualifiedErrorId : UsingWithoutInvokeCommand
InvocationInfo :
ScriptLineNumber : 2
OffsetInLine : 3
HistoryId : -1
Line : Write-Host $Using:VariableOutsideParallel
PositionMessage : At line:2 char:3
+ Write-Host $Using:VariableOutsideParallel
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CommandOrigin : Internal
ScriptStackTrace : at <ScriptBlock>, <No file>: line 2
TargetSite :
Name : GetUsingValue
DeclaringType : System.Management.Automation.VariableOps, System.Management.Automation, Version=7.2.4.500,
Culture=neutral, PublicKeyToken=31bf3856ad364e35
MemberType : Method
Module : System.Management.Automation.dll
Message : A Using variable cannot be retrieved. A Using variable can be used only with Invoke-Command,
Start-Job, or InlineScript in the script workflow. When it is used with Invoke-Command, the Using variable is valid
only if the script block is invoked on a remote computer.
Data : System.Collections.ListDictionaryInternal
Source : System.Management.Automation
HResult : -2146233087
StackTrace :
at System.Management.Automation.VariableOps.GetUsingValue(MutableTuple tuple, String usingExpressionKey, Int32
index, ExecutionContext context)
at System.Management.Automation.Interpreter.FuncCallInstruction`5.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
CategoryInfo : InvalidOperation: (:) [], RuntimeException
FullyQualifiedErrorId : UsingWithoutInvokeCommand
InvocationInfo :
ScriptLineNumber : 2
OffsetInLine : 3
HistoryId : -1
Line : Write-Host $Using:VariableOutsideParallel
PositionMessage : At line:2 char:3
+ Write-Host $Using:VariableOutsideParallel
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CommandOrigin : Internal
ScriptStackTrace : at <ScriptBlock>, <No file>: line 2Environment data
PS> $PSVersionTable
Name Value
---- -----
PSVersion 7.2.5
PSEdition Core
GitCommitId 7.2.5
OS Microsoft Windows 10.0.19044
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0Visuals
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