iter not called on subclasses of bytes

For example:

class test(bytes):
    def __init__(self):
        self.it= False
    def __iter__(self):
        self.it = True
        return self    
    def __next__(self):
        raise StopIteration

# via for loop
t = test()
for x in t: pass

assert t.it

# via list
t = test()
list(t)

assert t.it

This issue also seems to occur for other iterable base classes:

• str: fails on list call
• tuple: StackOverflowException
• list: StackOverflowException
• collections.deque: fails on for loop and list call
• set: fails on for loop and list call
• other cases?

Hit this failure while trying to run ipy -m pip install pyserial.

Start by running the provided IronPython reproducer for the bytes subclass, then compare it with the listed str, tuple, list, deque, and set cases. Trace the iteration behavior for both a for loop and list conversion, and consider the issue done when the expected iter calls occur without recursion or stack overflow.