From 53752ad8de37cb6597561d72fc67e5bf1278a62f Mon Sep 17 00:00:00 2001
From: david <david@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Thu, 22 Nov 2007 08:31:13 +0000
Subject: [PATCH] Change l_exc_finalize to recognize both nil and false as
 exception indicators. Previously only nil did this but most of NSE's internal
 functions return nil. A value of true means there was no exception and
 anything else is a fatal error.

---
 nse_nmaplib.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/nse_nmaplib.cc b/nse_nmaplib.cc
index f114f9f38..57072d4dd 100644
--- a/nse_nmaplib.cc
+++ b/nse_nmaplib.cc
@@ -470,13 +470,15 @@ static int l_print_debug_unformatted(lua_State *l) {
 }
 
 static int l_exc_finalize(lua_State *l) {
-	if (lua_isnil(l, 1)) {
+	if (!lua_toboolean(l, 1)) {
+		/* false or nil. */
 		lua_pushvalue(l, lua_upvalueindex(1));
 		lua_call(l, 0, 0);
 		lua_settop(l, 2);
 		lua_error(l);
 		return 0;
-	} else if(lua_toboolean(l, 1)) {
+	} else if(lua_isboolean(l, 1) && lua_toboolean(l, 1)) {
+		/* true. */
 		lua_remove(l, 1);
 		return lua_gettop(l);
 	} else {