Fix ForEach-Object -Parallel when passing in script block variable (#16564) #17860
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…owerShell#16564) ForeEach-Object -Parallel using variable processing walks the script block AST to determine if the using variable was defined in the current scope, and does this by tracking the number of 'ForEach-Object -Parallel' commands in the call chain. However, the provided script block is different, depending on whether it is passed in as a variable or via parameter binding. $myScript = '"Hello!"' 1 | ForEach-Object -Parallel ([scriptblock]::Create($myScript)) # Script block Ast does not contain the 'ForEach-Object' command in the call chain 1 | ForEach-Object -Parallel { "Hello!" } # Script block Ast does contain the 'ForEach-Object' command in the call chain This change takes into account the two forms of script blocks
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PR Summary
ForeEach-Object -Parallel using variable processing walks the script block AST to determine if the using variable was defined in the current scope, and does this by tracking the number of 'ForEach-Object -Parallel' commands in the call chain.
However, the provided script block is different, depending on whether it is passed in as a variable or via parameter binding.
$myScript = '"Hello!"'
1 | ForEach-Object -Parallel ([scriptblock]::Create($myScript))
Script block Ast does not contain the 'ForEach-Object' command in the call chain
1 | ForEach-Object -Parallel { "Hello!" }
Script block Ast does contain the 'ForEach-Object' command in the call chain
This change takes into account the two forms of script blocks
PR Context
Backport of #16564
PR Checklist
.h,.cpp,.cs,.ps1and.psm1files have the correct copyright headerWIP:or[ WIP ]to the beginning of the title (theWIPbot will keep its status check atPendingwhile the prefix is present) and remove the prefix when the PR is ready.(which runs in a different PS Host).