+1

Author: skirpichev

Modules/_ctypes/_ctypes.c

@@ -2271,7 +2271,8 @@ static PyObject *CreateSwappedType(ctypes_state *st, PyTypeObject *type,
         stginfo->ffi_type_pointer = *fmt->pffi_type;
     }
     else {
-        const size_t els_size = sizeof(fmt->pffi_type->elements);
+        assert(fmt->pffi_type->type == FFI_TYPE_COMPLEX);
+        const size_t els_size = sizeof(2 * sizeof(ffi_type *));
         stginfo->ffi_type_pointer.size = fmt->pffi_type->size;
         stginfo->ffi_type_pointer.alignment = fmt->pffi_type->alignment;
         stginfo->ffi_type_pointer.type = fmt->pffi_type->type;