Issue #20037: Avoid crashes when doing text I/O late at interpreter shutdown.
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index fb89a17..747f623 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -45,7 +45,9 @@
static PyObject *
_unsupported(const char *message)
{
- PyErr_SetString(IO_STATE->unsupported_operation, message);
+ _PyIO_State *state = IO_STATE();
+ if (state != NULL)
+ PyErr_SetString(state->unsupported_operation, message);
return NULL;
}
@@ -852,7 +854,7 @@
char *errors = NULL;
char *newline = NULL;
int line_buffering = 0, write_through = 0;
- _PyIO_State *state = IO_STATE;
+ _PyIO_State *state = NULL;
PyObject *res;
int r;
@@ -891,6 +893,9 @@
if (encoding == NULL) {
/* Try os.device_encoding(fileno) */
PyObject *fileno;
+ state = IO_STATE();
+ if (state == NULL)
+ goto error;
fileno = _PyObject_CallMethodId(buffer, &PyId_fileno, NULL);
/* Ignore only AttributeError and UnsupportedOperation */
if (fileno == NULL) {