--- lua-5.1.4.orig/src/ldblib.c	2007/12/28 15:32:23	2.63.1.3
+++ lua-5.1.4/src/ldblib.c	2010/02/23 12:36:59
@@ -45,6 +45,7 @@
 
 
 static int db_getfenv (lua_State *L) {
+  luaL_checkany(L, 1);
   lua_getfenv(L, 1);
   return 1;
 }