python
diff --git a/‎Misc/NEWS.d/next/Library/2023-11-14-18-43-55.gh-issue-111942.x1pnrj.rst
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+2Lines changed: 2 additions & 0 deletions b/‎Misc/NEWS.d/next/Library/2023-11-14-18-43-55.gh-issue-111942.x1pnrj.rst
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+2Lines changed: 2 additions & 0 deletions
diff --git a/‎Modules/_io/textio.c
Copy file name to clipboardExpand all lines: Modules/_io/textio.c
+6-2Lines changed: 6 additions & 2 deletions b/‎Modules/_io/textio.c
Copy file name to clipboardExpand all lines: Modules/_io/textio.c
+6-2Lines changed: 6 additions & 2 deletions
@@ -0,0 +1,2 @@
+Fix SystemError in the TextIOWrapper constructor with non-encodable "errors"
+argument in non-debug mode.
@@ -1112,6 +1112,10 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
     else if (io_check_errors(errors)) {
         return -1;
     }
+    const char *errors_str = PyUnicode_AsUTF8(errors);
+    if (errors_str == NULL) {
+        return -1;
+    }
 
     if (validate_newline(newline) < 0) {
         return -1;
@@ -1184,11 +1188,11 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
     /* Build the decoder object */
     _PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
     self->state = state;
-    if (_textiowrapper_set_decoder(self, codec_info, PyUnicode_AsUTF8(errors)) != 0)
+    if (_textiowrapper_set_decoder(self, codec_info, errors_str) != 0)
         goto error;
 
     /* Build the encoder object */
-    if (_textiowrapper_set_encoder(self, codec_info, PyUnicode_AsUTF8(errors)) != 0)
+    if (_textiowrapper_set_encoder(self, codec_info, errors_str) != 0)
         goto error;
 
     /* Finished sorting out the codec details */
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Fix SystemError in the TextIOWrapper constructor with non-encodable "errors"`
	`2`	`+argument in non-debug mode.`