Issue #22570: Renamed Py_SETREF to Py_XSETREF.
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index bb4c5ef..38bb0d8 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -966,7 +966,7 @@
                 "Oi", self->decoder, (int)self->readtranslate);
             if (incrementalDecoder == NULL)
                 goto error;
-            Py_SETREF(self->decoder, incrementalDecoder);
+            Py_XSETREF(self->decoder, incrementalDecoder);
         }
     }
 
@@ -1346,7 +1346,7 @@
 static void
 textiowrapper_set_decoded_chars(textio *self, PyObject *chars)
 {
-    Py_SETREF(self->decoded_chars, chars);
+    Py_XSETREF(self->decoded_chars, chars);
     self->decoded_chars_used = 0;
 }
 
@@ -1475,7 +1475,7 @@
             goto fail;
         }
         Py_DECREF(dec_buffer);
-        Py_SETREF(self->snapshot, Py_BuildValue("NN", dec_flags, next_input));
+        Py_XSETREF(self->snapshot, Py_BuildValue("NN", dec_flags, next_input));
     }
     Py_DECREF(input_chunk);
 
@@ -1575,7 +1575,7 @@
         if (chunks != NULL) {
             if (result != NULL && PyList_Append(chunks, result) < 0)
                 goto fail;
-            Py_SETREF(result, PyUnicode_Join(_PyIO_empty_str, chunks));
+            Py_XSETREF(result, PyUnicode_Join(_PyIO_empty_str, chunks));
             if (result == NULL)
                 goto fail;
             Py_CLEAR(chunks);
@@ -1832,7 +1832,7 @@
     if (chunks != NULL) {
         if (line != NULL && PyList_Append(chunks, line) < 0)
             goto error;
-        Py_SETREF(line, PyUnicode_Join(_PyIO_empty_str, chunks));
+        Py_XSETREF(line, PyUnicode_Join(_PyIO_empty_str, chunks));
         if (line == NULL)
             goto error;
         Py_DECREF(chunks);