Issue #16230: Fix a crash in select.select() when one the lists changes size while iterated on.
Patch by Serhiy Storchaka.
diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index 98b3108..0736215 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -83,7 +83,7 @@
{
int max = -1;
int index = 0;
- Py_ssize_t i, len = -1;
+ Py_ssize_t i;
PyObject* fast_seq = NULL;
PyObject* o = NULL;
@@ -94,9 +94,7 @@
if (!fast_seq)
return -1;
- len = PySequence_Fast_GET_SIZE(fast_seq);
-
- for (i = 0; i < len; i++) {
+ for (i = 0; i < PySequence_Fast_GET_SIZE(fast_seq); i++) {
SOCKET v;
/* any intervening fileno() calls could decr this refcnt */