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Fix
_PyObject_FastCall
for Python 3.13 (#17502)
`_PyObject_FastCall` will be removed in 3.13. It can safely replaced by `PyObject_Vectorcall` (available since `3.9`) / `_PyObject_Vectorcall` (available since `3.8`). python/cpython#106023 (comment) https://peps.python.org/pep-0590/ Fixes ```cpp /home/runner/work/mypy/mypy/mypyc/lib-rt/pythonsupport.h: In function ‘update_bases’: (diff) /home/runner/work/mypy/mypy/mypyc/lib-rt/pythonsupport.h:62:20: error: implicit declaration of function ‘_PyObject_FastCall’; did you mean ‘PyObject_Call’? [-Werror=implicit-function-declaration] (diff) 62 | new_base = _PyObject_FastCall(meth, stack, 1); (diff) /home/runner/work/mypy/mypy/mypyc/lib-rt/pythonsupport.h:62:18: error: assignment to ‘PyObject *’ {aka ‘struct _object *’} from ‘int’ makes pointer from integer without a cast [-Werror=int-conversion] (diff) 62 | new_base = _PyObject_FastCall(meth, stack, 1); (diff) | ^ (diff) /home/runner/work/mypy/mypy/mypyc/lib-rt/pythonsupport.h: In function ‘init_subclass’: (diff) /home/runner/work/mypy/mypy/mypyc/lib-rt/pythonsupport.h:111:11: error: assignment to ‘PyObject *’ {aka ‘struct _object *’} from ‘int’ makes pointer from integer without a cast [-Werror=int-conversion] (diff) 111 | super = _PyObject_FastCall((PyObject *)&PySuper_Type, args, 2); (diff) | ^ (diff) ```
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