[issue20508] IndexError from ipaddress._BaseNetwork.__getitem__ has no message

[Gareth Rees]

Gareth Rees added the comment:

I've attached a revised patch that addresses Berker Peksag's concerns:

1. The message associated with the IndexError is now "address out of range" with no information about which address failed or why.

2. There's a new test case for an IndexError from an IPv6 address lookup.

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Added file: http://bugs.python.org/file43341/ipaddress.patch

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