`trap` creates a new scope

Statements in a trap block are invoked in a new scope. This fact may be not obvious. For example, statements is a similar catch block are invoked in the same scope.

Scripts

trap.new.scope.1.incorrect.ps1 - The difference between statements with trap and catch.
trap.new.scope.2.workaround.ps1 - Workaround with Set-Variable -Scope 1.
trap.new.scope.3.workaround.ps1 - Workaround with a hashtable.

Microsoft Connect 224294