Issue222790

A ClassCastException is thrown by the script below.

-------------- FILE: test118.py --------------
IntegerType = type(1)
class SpecialInt (IntegerType):
    def __init__(self, n):  IntegerType.__init__(self, n)
    def double(self):  return self*2

si = SpecialInt(12)
print si
print si + 1
print si + si
print 3 + si
-------------- END --------------

Fixed. A subclass of builtin types are possible, but no API exists that the subclass can use/override to gain control of the builtin type.