1>>> :
2  File "<stdin>", line 1
3    :
4    ^
5SyntaxError: invalid syntax
6>>>
7KeyboardInterrupt
8>>>
9
10>>> 1/0
11Traceback (most recent call last):
12   ...
13ZeroDivisionError
14
15>>> 1/0   # this used to swallow the traceback
16Traceback (most recent call last):
17   ...
18