[issue46018] expm1 may incorrectly raise OverflowError on underflow

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

> Lines 500-504 are the ones that trigger it.

Ah, right. Thanks.

> Apparently there are no tests in that file for straight exp()

Yes - that file was mostly written to give good coverage for places where we'd written our own implementations rather than simply wrapping an existing libm function, though I think we've now reverted to using the libm expm1 in all cases.

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<https://bugs.python.org/issue46018>
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