Simplify error formatting (no default encoding required).
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index ff1b4c8..343e67c 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -515,9 +515,8 @@
nclosure = closure == Py_None ? 0 : PyTuple_GET_SIZE(closure);
if (nfree != nclosure)
return PyErr_Format(PyExc_ValueError,
- "%s requires closure of length %zd, not %zd",
- PyUnicode_AsString(code->co_name),
- nfree, nclosure);
+ "%U requires closure of length %zd, not %zd",
+ code->co_name, nfree, nclosure);
if (nclosure) {
Py_ssize_t i;
for (i = 0; i < nclosure; i++) {