PSScriptAnalyzer and ForEach-Object, says variable "is assigned but never used" but it is

[mlduber]

Steps to reproduce

'foo' | ForEach-Object { $guy = 'bar' }; $guy

Expected behavior

Zero problem. Scope issue should be expected with Invoke-Command but not with ForEach-Object.

Actual behavior

The variable 'guy' is assigned but never used.PSScriptAnalyzer(PSUseDeclaredVarsMoreThanAssignments)

Environment data

PSScriptAnalyzer module version is 1.19.0.

[rjmholt]

Duplicate of #1163

[rjmholt]

I've written up #1641 now to explain the state of play here