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v0.8.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 226a012d1cd61f42ecd3056c554922f359a1a35d authored by Brandt Bucher on 05 December 2020, 03:45:57 UTC, committed by GitHub on 05 December 2020, 03:45:57 UTC 
bpo-42536: GC track recycled tuples (GH-23623)
 
Several built-in and standard library types now ensure that their internal result tuples are always tracked by the garbage collector:

- collections.OrderedDict.items
- dict.items
- enumerate
- functools.reduce
- itertools.combinations
- itertools.combinations_with_replacement
- itertools.permutations
- itertools.product
- itertools.zip_longest
- zip

Previously, they could have become untracked by a prior garbage collection.
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Tip revision: 226a012d1cd61f42ecd3056c554922f359a1a35d authored by Brandt Bucher on 05 December 2020, 03:45:57 UTC
bpo-42536: GC track recycled tuples (GH-23623)
Tip revision: 226a012
_math.h 
#ifdef HAVE_ACOSH
#  define m_acosh acosh
#else
/* if the system doesn't have acosh, use the substitute
   function defined in Modules/_math.c. */
double _Py_acosh(double x);
#  define m_acosh _Py_acosh
#endif

#ifdef HAVE_ASINH
#  define m_asinh asinh
#else
/* if the system doesn't have asinh, use the substitute
   function defined in Modules/_math.c. */
double _Py_asinh(double x);
#  define m_asinh _Py_asinh
#endif

#ifdef HAVE_ATANH
#  define m_atanh atanh
#else
/* if the system doesn't have atanh, use the substitute
   function defined in Modules/_math.c. */
double _Py_atanh(double x);
#define m_atanh _Py_atanh
#endif

#ifdef HAVE_EXPM1
#  define m_expm1 expm1
#else
/* if the system doesn't have expm1, use the substitute
   function defined in Modules/_math.c. */
double _Py_expm1(double x);
#define m_expm1 _Py_expm1
#endif

double _Py_log1p(double x);

/* Use the substitute from _math.c on all platforms:
   it includes workarounds for buggy handling of zeros. */
#define m_log1p _Py_log1p
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