Cannot assign type 'sighandler_t' to 'void (*)(int) noexcept'

[jwilk]

Since dee8906 ("Keep 'extern' visibility in context of struct/union to properly infer 'noexcept' for function pointer fields (GH-5386)"), this code no longer builds:

#cython: language_level=3

from libc.signal cimport SIG_DFL
from posix.signal cimport sigaction_t

cdef sigaction_t sa
sa.sa_handler = SIG_DFL

The error is:

sa.pyx:7:16: Cannot assign type 'sighandler_t' to 'void (*)(int) noexcept'

Originally reported by @fuzz2ret at jwilk/python-afl#29.
Cc: @matusvalo

[da-woods]

Thanks - I've just pushed a commit that should fix this

[da-woods]

It's probably worth doing a bit of a sweep of the Cython/Includes folder for other ctypedef functions

[da-woods]

cython/Cython/Includes/cpython/pythread.pxd

Line 9 in 8d54a67

long PyThread_start_new_thread(void (*)(void *), void *) # FIXME: legacy

cython/Cython/Includes/cpython/pylifecycle.pxd

Line 62 in 8d54a67

ctypedef void (*PyOS_sighandler_t)(int)

cython/Cython/Includes/cpython/object.pxd

Line 30 in 8d54a67

ctypedef void (*destructor)(PyObject*)

(Few more around there)

cython/Cython/Includes/libc/stdlib.pxd

Line 38 in 80772e0

int atexit (void (*function) ())

cython/Cython/Includes/cpython/cobject.pxd

Line 14 in 80772e0

object PyCObject_FromVoidPtr(void* cobj, void (*destr)(void *))

cython/Cython/Includes/cpython/pylifecycle.pxd

Line 32 in 80772e0

void _Py_PyAtExit(void (*func)(object), object)

Most of those may be OK if there in a cdef extern block, but it might be good to make them explicit anyway. I'll try to do that in the near future