Tweak Whats New and NEWS, assert buf->length

Author: cmaloney

Doc/whatsnew/3.14.rst

@@ -562,7 +562,7 @@ os
   (Contributed by James Roy in :gh:`127688`.)
 
 * Add the :func:`os.readinto` function to read into a
-  :ref:`buffer protocol <bufferobjects>` from a file descriptor.
+  :ref:`buffer object <bufferobjects>` from a file descriptor.
   (Contributed by Cody Maloney in :gh:`129205`.)
 
 pathlib

Misc/NEWS.d/next/Library/2025-01-22-16-54-25.gh-issue-129205.FMqrUt.rst

@@ -1 +1 @@
-Add :func:`os.readinto` to read into a :ref:`buffer protocol <bufferobjects>` from a file descriptor.
+Add :func:`os.readinto` to read into a :ref:`buffer object <bufferobjects>` from a file descriptor.

Modules/posixmodule.c

@@ -11456,12 +11456,7 @@ static Py_ssize_t
 os_readinto_impl(PyObject *module, int fd, Py_buffer *buffer)
 /*[clinic end generated code: output=8091a3513c683a80 input=7485bbbb143bf7e8]*/
 {
-    if (buffer->len < 0) {
-        assert(!PyErr_Occurred());
-        errno = EINVAL;
-        PyErr_SetFromErrno(PyExc_OSError);
-        return -1;
-    }
+    assert(buffer->len >= 0);
     Py_ssize_t result = _Py_read(fd, buffer->buf, buffer->len);
     /* Ensure negative is never returned without an error. Simplifies calling
         code. _Py_read should succeed, possibly reading 0 bytes, _or_ set an