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Issue #18513: Add workaround for OS X 10.8 cexp bug that leads to wrong cmath.rect(0.0,-0.0) results.

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Mark Dickinson 2013-07-20 17:59:13 +01:00
parent 7ed4294d7f
commit 58ceecfe5a
2 changed files with 10 additions and 0 deletions
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3
Misc/NEWS
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@ -49,6 +49,9 @@ Core and Builtins
Library Library
------- -------
- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +
gcc.
- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension. - Issue #18480: Add missing call to PyType_Ready to the _elementtree extension.
- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by - Issue #17778: Fix test discovery for test_multiprocessing. (Patch by

7
Modules/cmathmodule.c
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@ -1006,6 +1006,13 @@ cmath_rect(PyObject *self, PyObject *args)
else else
errno = 0; errno = 0;
} }
else if (phi == 0.0) {
/* Workaround for buggy results with phi=-0.0 on OS X 10.8. See
bugs.python.org/issue18513. */
z.real = r;
z.imag = r * phi;
errno = 0;
}
else { else {
z.real = r * cos(phi); z.real = r * cos(phi);
z.imag = r * sin(phi); z.imag = r * sin(phi);