I found this by accident, left the . property reference while testing ideas.

I think it is incorrect that this code goes without any errors, and also generates no result.

Steps to reproduce

$Departments = @'
Alpha
Beta
Gamma
Zulu
'@. -split '\r'

Expected behavior

At line:6 char:4
+ '@.
+    ~
Missing property name after reference operator.
+ CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : MissingPropertyName

Actual behavior

Exactly, nothing happens, no error, no result. Any unary operator seems to do this. A non-unary operator will generate two error messages, missing property, and unexpected token (for the right operand).

Environment data

PowerShell 6.2 on Windows 10 1809
Windows PowerShell 5.1 (same OS)