From d266d40deaaf0fc7234a06217e121a158c980085 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 9 Feb 2017 12:50:05 -0200
Subject: [PATCH] error when calling close method without arguments (e.g.,
 |io.stdin.close()|)

---
 liolib.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/liolib.c b/liolib.c
index 8491edca..3fa87461 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.150 2016/09/01 16:14:56 roberto Exp roberto $
+** $Id: liolib.c,v 2.151 2016/12/20 18:37:00 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -206,11 +206,16 @@ static int aux_close (lua_State *L) {
 }
 
 
+static int f_close (lua_State *L) {
+  tofile(L);  /* make sure argument is an open stream */
+  return aux_close(L);
+}
+
+
 static int io_close (lua_State *L) {
   if (lua_isnone(L, 1))  /* no argument? */
     lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use standard output */
-  tofile(L);  /* make sure argument is an open stream */
-  return aux_close(L);
+  return f_close(L);
 }
 
 
@@ -712,7 +717,7 @@ static const luaL_Reg iolib[] = {
 ** methods for file handles
 */
 static const luaL_Reg flib[] = {
-  {"close", io_close},
+  {"close", f_close},
   {"flush", f_flush},
   {"lines", f_lines},
   {"read", f_read},