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-rw-r--r--Objects/unicodeobject.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 9dc96da..a0740db 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -3528,8 +3528,9 @@ static PyObject *charmapencode_lookup(Py_UNICODE c, PyObject *mapping)
return x;
else {
/* wrong return value */
- PyErr_SetString(PyExc_TypeError,
- "character mapping must return integer, None or str");
+ PyErr_Format(PyExc_TypeError,
+ "character mapping must return integer, None or str8, not %.400s",
+ x->ob_type->tp_name);
Py_DECREF(x);
return NULL;
}