chore: refactor

Author: BobTheBuidler

mypyc/irbuild/mapper.py

@@ -76,8 +76,7 @@ def type_to_rtype(self, typ: Type | None) -> RType:
             if typ.type.is_newtype and len(typ.type.bases) == 1:
                 # I'm pretty sure this length check always returns True but am not positive and False would break things
                 # Unwrap NewType to its base type for rprimitive mapping
-                base_typeinfo = typ.type.bases[0].type
-                return self.type_to_rtype(Instance(base_typeinfo, []))
+                return self.type_to_rtype(typ.type.bases[0])
             if typ.type.fullname == "builtins.int":
                 return int_rprimitive
             elif typ.type.fullname == "builtins.float":