From 9f61679074d000cb4254b4f67c40bd125eba50a2 Mon Sep 17 00:00:00 2001
From: Ivan Mironov <mironov.ivan@gmail.com>
Date: Fri, 22 May 2026 14:11:52 +0200
Subject: [PATCH] Add missing test for select.select()

This is a follow up for https://github.com/RustPython/RustPython/pull/7948
---
 extra_tests/snippets/stdlib_select.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/extra_tests/snippets/stdlib_select.py b/extra_tests/snippets/stdlib_select.py
index 9afd95beca..5263bc344f 100644
--- a/extra_tests/snippets/stdlib_select.py
+++ b/extra_tests/snippets/stdlib_select.py
@@ -62,6 +62,16 @@ def fileno(self):
         resource.setrlimit(resource.RLIMIT_NOFILE, (soft_max_fds, hard_max_fds))
 sockets = [s for _ in range(TOO_MANY_SELECT_FDS // 2) for s in socket.socketpair()]
 assert_raises(ValueError, select.select, sockets, [], [], 0)
+if sys.platform != "win32":
+    # Try to overflow descriptor bit mask on *nix with a single item
+    max_fd = -1
+    max_fd_sock = None
+    sockets.reverse()
+    for sock in sockets:
+        if sock.fileno() > max_fd:
+            max_fd = sock.fileno()
+            max_fd_sock = sock
+    assert_raises(ValueError, select.select, [max_fd_sock], [], [], 0)
 del sockets
 a, b = socket.socketpair()
 # CPython disallows this on *nix systems too.