[issue11674] list(obj), tuple(obj) swallow TypeError (in _PyObject_LengthHint)

[Benjamin Peterson]

Benjamin Peterson <benjamin at python.org> added the comment:

2011/4/1 Raymond Hettinger <report at bugs.python.org>:
> [benjamin]
> The __length_hint__ protocol is a public API, so anyone can use it.  Also, the issue is a broader than __length_hint__, it is really distinguishing multiple possible meanings for a TypeError raised by a call to __len__.

What?? I certainly hope not. I thought it was supposed to be a performance hack.

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