Index: Objects/memoryobject.c
===================================================================
--- Objects/memoryobject.c	(révision 82812)
+++ Objects/memoryobject.c	(copie de travail)
@@ -632,7 +632,7 @@
 static int
 memory_ass_sub(PyMemoryViewObject *self, PyObject *key, PyObject *value)
 {
-    Py_ssize_t start, len, bytelen, i;
+    Py_ssize_t start, len, bytelen;
     Py_buffer srcview;
     Py_buffer *view = &(self->view);
     char *srcbuf, *destbuf;
@@ -702,16 +702,8 @@
     if (destbuf + bytelen < srcbuf || srcbuf + bytelen < destbuf)
         /* No overlapping */
         memcpy(destbuf, srcbuf, bytelen);
-    else if (destbuf < srcbuf) {
-        /* Copy in ascending order */
-        for (i = 0; i < bytelen; i++)
-            destbuf[i] = srcbuf[i];
-    }
-    else {
-        /* Copy in descencing order */
-        for (i = bytelen - 1; i >= 0; i--)
-            destbuf[i] = srcbuf[i];
-    }
+    else
+        memmove(destbuf, srcbuf, bytelen);
 
     PyBuffer_Release(&srcview);
     return 0;