[perl #130706] Return in block doesn't see outside return signature

[Zoffix Znet via RT]

No idea if there's any relation between the two, but there's also this ticket 
where a return type constraint set to Nil on a sub affects interpolation of a 
code block in a string inside that sub; almost as if the constraint propagated 
to it: https://rt.perl.org/Ticket/Display.html?id=129874#ticket-history