Issue #24684: socket.socket.getaddrinfo() now calls

PyUnicode_AsEncodedString() instead of calling the encode() method of the
host, to handle correctly custom unicode string with an encode() method which
doesn't return a byte string. The encoder of the IDNA codec is now called
directly instead of calling the encode() method of the string.

Misc/NEWS

@@ -37,6 +37,12 @@ Core and Builtins
 Library
 -------
 
+- Issue #24684: socket.socket.getaddrinfo() now calls
+  PyUnicode_AsEncodedString() instead of calling the encode() method of the
+  host, to handle correctly custom unicode string with an encode() method
+  which doesn't return a byte string. The encoder of the IDNA codec is now
+  called directly instead of calling the encode() method of the string.
+
 - Issue #24982: shutil.make_archive() with the "zip" format now adds entries
   for directories (including empty directories) in ZIP file.
 

Modules/socketmodule.c

@@ -4158,7 +4158,7 @@ socket_getaddrinfo(PyObject *self, PyObject *args)
     if (hobj == Py_None) {
         hptr = NULL;
     } else if (PyUnicode_Check(hobj)) {
-        idna = PyObject_CallMethod(hobj, "encode", "s", "idna");
+        idna = PyUnicode_AsEncodedString(hobj, "idna", NULL);
         if (!idna)
             return NULL;
         hptr = PyString_AsString(idna);