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| author | Mark Dickinson <mdickinson@enthought.com> | 2021-06-12 09:23:02 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-06-12 09:23:02 (GMT) |
| commit | 4a42cebf6dd769e2fa4e234a9e91093b3ad1cb63 (patch) | |
| tree | 925efc812b8810d8c5fb6c1040307d1cacf4b976 /Modules | |
| parent | 3ec3ee7d2e9b45b586e486e429b412d6d0ca530f (diff) | |
| download | cpython-4a42cebf6dd769e2fa4e234a9e91093b3ad1cb63.zip cpython-4a42cebf6dd769e2fa4e234a9e91093b3ad1cb63.tar.gz cpython-4a42cebf6dd769e2fa4e234a9e91093b3ad1cb63.tar.bz2 | |
bpo-44339: Fix math.pow corner case to comply with IEEE 754 (GH-26606)
Change the behaviour of `math.pow(0.0, -math.inf)` and `math.pow(-0.0, -math.inf)` to return positive infinity instead of raising `ValueError`. This makes `math.pow` consistent with the built-in `pow` (and the `**` operator) for this particular special case, and brings the `math.pow` special-case handling into compliance with IEEE 754.
Diffstat (limited to 'Modules')
| -rw-r--r-- | Modules/mathmodule.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c index b3429c5..bd97b03 100644 --- a/Modules/mathmodule.c +++ b/Modules/mathmodule.c @@ -2810,8 +2810,6 @@ math_pow_impl(PyObject *module, double x, double y) r = y; else if (y < 0. && fabs(x) < 1.0) { r = -y; /* result is +inf */ - if (x == 0.) /* 0**-inf: divide-by-zero */ - errno = EDOM; } else r = 0.; |