when init top-level pad is HASH(0x22dda8) -> $%bar = \{}; HASH(0x3cff4) -> $%foo = \{}; when setting Attr in Foo for HASH(0x3cff4) top-level pad is when setting Attr in Bar for HASH(0x22dda8) top-level pad is HASH(0x22dda8) -> $%bar = \{}; when runtime top-level pad is