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-rw-r--r--Objects/unicodeobject.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 6dea94f479..920f9ea2d8 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -3534,10 +3534,16 @@ PyObject *replace(PyUnicodeObject *self,
n = count(self, 0, self->length, str1);
if (n > maxcount)
n = maxcount;
- if (n == 0 && PyUnicode_CheckExact(self)) {
+ if (n == 0) {
/* nothing to replace, return original string */
- Py_INCREF(self);
- u = self;
+ if (PyUnicode_CheckExact(self)) {
+ Py_INCREF(self);
+ u = self;
+ }
+ else {
+ u = (PyUnicodeObject *)
+ PyUnicode_FromUnicode(self->str, self->length);
+ }
} else {
u = _PyUnicode_New(
self->length + n * (str2->length - str1->length));