My smallest failing example so far:


    def test_recursion_in_except_handler(self):

        self.test_no_hang_on_context_chain_cycle2()

        def set_relative_recursion_limit(n):
            depth = 1
            while True:
                try:
                    sys.setrecursionlimit(depth)
                except RecursionError:
                    depth += 1
                else:
                    break
            sys.setrecursionlimit(depth+n)

        def recurse_in_body_and_except():
            try:
                recurse_in_body_and_except()
            except:
                recurse_in_body_and_except()

        recursionlimit = sys.getrecursionlimit()
        try:
            set_relative_recursion_limit(10)
            try:
                recurse_in_body_and_except()
            except RecursionError:
                pass
            else:
                self.fail("Should have raised a RecursionError")
        finally:
            sys.setrecursionlimit(recursionlimit)