Issue #6697: use %U format instead of _PyUnicode_AsString(), because
_PyUnicode_AsString() was not checked for error (NULL).
The unicode string is no more truncated to 200 or 400 *bytes*.
diff --git a/Python/import.c b/Python/import.c
index 8a948b9..036d17e 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -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;