Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(révision 78805)
+++ Python/ceval.c	(copie de travail)
@@ -3989,10 +3989,10 @@
 		if (PyDict_GetItem(kwdict, key) != NULL) {
 			PyErr_Format(PyExc_TypeError,
 				     "%.200s%s got multiple values "
-				     "for keyword argument '%.200s'",
+				     "for keyword argument '%U'",
 				     PyEval_GetFuncName(func),
 				     PyEval_GetFuncDesc(func),
-				     _PyUnicode_AsString(key));
+				     key);
 			Py_DECREF(key);
 			Py_DECREF(value);
 			Py_DECREF(kwdict);
Index: Python/import.c
===================================================================
--- Python/import.c	(révision 78805)
+++ Python/import.c	(copie de travail)
@@ -2691,8 +2691,8 @@
 		parent = PyDict_GetItem(modules, parentname);
 		if (parent == NULL) {
 			PyErr_Format(PyExc_ImportError,
-			    "reload(): parent %.200s not in sys.modules",
-			     _PyUnicode_AsString(parentname));
+			    "reload(): parent %U not in sys.modules",
+			     parentname);
 			Py_DECREF(parentname);
 			imp_modules_reloading_clear();
 			return NULL;
Index: Objects/typeobject.c
===================================================================
--- Objects/typeobject.c	(révision 78805)
+++ Objects/typeobject.c	(copie de travail)
@@ -1295,10 +1295,15 @@
 		for (j = i + 1; j < n; j++) {
 			if (PyList_GET_ITEM(list, j) == o) {
 				o = class_name(o);
-				PyErr_Format(PyExc_TypeError,
-					     "duplicate base class %.400s",
-					     o ? _PyUnicode_AsString(o) : "?");
-				Py_XDECREF(o);
+				if (o != NULL) {
+					PyErr_Format(PyExc_TypeError,
+						     "duplicate base class %U",
+						     o);
+					Py_DECREF(o);
+				} else {
+					PyErr_SetString(PyExc_TypeError,
+						     "duplicate base class");
+				}
 				return -1;
 			}
 		}
Index: Objects/funcobject.c
===================================================================
--- Objects/funcobject.c	(révision 78805)
+++ Objects/funcobject.c	(copie de travail)
@@ -295,9 +295,9 @@
 		    PyTuple_GET_SIZE(op->func_closure));
 	if (nclosure != nfree) {
 		PyErr_Format(PyExc_ValueError,
-			     "%s() requires a code object with %zd free vars,"
+			     "%U() requires a code object with %zd free vars,"
 			     " not %zd",
-			     _PyUnicode_AsString(op->func_name),
+			     op->func_name,
 			     nclosure, nfree);
 		return -1;
 	}
Index: Modules/zipimport.c
===================================================================
--- Modules/zipimport.c	(révision 78805)
+++ Modules/zipimport.c	(copie de travail)
@@ -321,15 +321,12 @@
 		/* add __path__ to the module *before* the code gets
 		   executed */
 		PyObject *pkgpath, *fullpath;
-		char *prefix = _PyUnicode_AsString(self->prefix);
 		char *subname = get_subname(fullname);
 		int err;
 
-		fullpath = PyUnicode_FromFormat("%s%c%s%s",
-					_PyUnicode_AsString(self->archive),
-					SEP,
-					prefix ? prefix : "",
-					subname);
+		fullpath = PyUnicode_FromFormat("%U%c%U%s",
+					self->archive, SEP,
+					self->prefix, subname);
 		if (fullpath == NULL)
 			goto error;
 
Index: Modules/_hashopenssl.c
===================================================================
--- Modules/_hashopenssl.c	(révision 78805)
+++ Modules/_hashopenssl.c	(copie de travail)
@@ -294,10 +294,7 @@
 static PyObject *
 EVP_repr(EVPobject *self)
 {
-    char buf[100];
-    PyOS_snprintf(buf, sizeof(buf), "<%s HASH object @ %p>",
-            _PyUnicode_AsString(self->name), self);
-    return PyUnicode_FromString(buf);
+    return PyUnicode_FromFormat("<%U HASH object @ %p>", self->name, self);
 }
 
 #if HASH_OBJ_CONSTRUCTOR