# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1779721579 -3600
# Node ID a331cde41c85c8c26cb4b4ea80e61381c86bd5e4
# Parent  6fb6e383123fd4fe4db238c862b460ebde030068
util.poll: Reject fd == FD_SETSIZE

FD_SETSIZE is the maximum total number of FDs supports (well, the highest
valid fd number). 0 is a valid fd number, so it supports up to 1023 if
FD_SETSIZE is 1024.

This is just a fencepost issue, fds > FD_SETSIZE were already correctly
rejected.

diff -r 6fb6e383123f -r a331cde41c85 util-src/poll.c
--- a/util-src/poll.c	Mon May 25 16:02:39 2026 +0100
+++ b/util-src/poll.c	Mon May 25 16:06:19 2026 +0100
@@ -139,7 +139,7 @@
 #endif
 #ifdef USE_SELECT
 
-	if(fd > FD_SETSIZE) {
+	if(fd >= FD_SETSIZE) {
 		luaL_pushfail(L);
 		lua_pushstring(L, strerror(EBADF));
 		lua_pushinteger(L, EBADF);