Since PyLong_FromLong can return NULL, it is necessary to use Py_XDECREF, as stated in refcount.h.

Linked PRs

• gh-134411: assert PyLong_FromLong(x) != NULL when x is known to be small #134415
• [3.14] gh-134411: assert PyLong_FromLong(x) != NULL when x is known to be small (GH-134415) #136910
• [3.13] gh-134411: assert PyLong_FromLong(x) != NULL when x is known to be small (GH-134415) #136911