diff --git a/lcode.c b/lcode.c
index bd73dc57..cc06ec47 100644
--- a/lcode.c
+++ b/lcode.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 1.54 2000/12/26 18:46:09 roberto Exp roberto $
+** $Id: lcode.c,v 1.55 2000/12/28 12:55:41 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -32,7 +32,7 @@ static Instruction previous_instruction (FuncState *fs) {
   if (fs->pc > fs->lasttarget)  /* no jumps to current position? */
     return fs->f->code[fs->pc-1];  /* returns previous instruction */
   else
-    return CREATE_0(OP_END);  /* no optimizations after an `END' */
+    return CREATE_0(-1);  /* no optimizations after an invalid instruction */
 }
 
 
@@ -206,7 +206,7 @@ static OpCode invertjump (OpCode op) {
     case OP_JMPF: case OP_JMPONF:  return OP_JMPT;
     default:
       LUA_INTERNALERROR("invalid jump instruction");
-      return OP_END;  /* to avoid warnings */
+      return OP_JMP;  /* to avoid warnings */
   }
 }
 
@@ -236,7 +236,7 @@ void luaK_patchlist (FuncState *fs, int list, int target) {
   if (target == fs->lasttarget)  /* same target that list `jlt'? */
     luaK_concat(fs, &fs->jlt, list);  /* delay fixing */
   else
-    luaK_patchlistaux(fs, list, target, OP_END, 0);
+    luaK_patchlistaux(fs, list, target, OP_ADD, 0);
 }
 
 
@@ -653,7 +653,6 @@ int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
 
 
 const OpProperties luaK_opproperties[NUM_OPCODES] = {
-  {iO, 0, 0},	/* OP_END */
   {iU, 0, 0},	/* OP_RETURN */
   {iAB, 0, 0},	/* OP_CALL */
   {iAB, 0, 0},	/* OP_TAILCALL */
diff --git a/lopcodes.h b/lopcodes.h
index 5c9ffe59..a30de1be 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.68 2000/10/24 16:05:59 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.69 2000/12/04 18:33:40 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -82,7 +82,6 @@ typedef enum {
 /*----------------------------------------------------------------------
 name		args	stack before	stack after	side effects
 ------------------------------------------------------------------------*/
-OP_END,/*	-	-		(return)	no results	*/
 OP_RETURN,/*	U	v_n-v_x(at u)	(return)	returns v_x-v_n	*/
 
 OP_CALL,/*	A B	v_n-v_1 f(at a)	r_b-r_1		f(v1,...,v_n)	*/
diff --git a/lparser.c b/lparser.c
index bc1bf0c3..96395b38 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 1.122 2001/01/10 16:40:56 roberto Exp roberto $
+** $Id: lparser.c,v 1.123 2001/01/10 17:41:50 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -335,7 +335,7 @@ static void close_func (LexState *ls) {
   lua_State *L = ls->L;
   FuncState *fs = ls->fs;
   Proto *f = fs->f;
-  luaK_code0(fs, OP_END);
+  luaK_code1(fs, OP_RETURN, ls->fs->nactloc);  /* final return */
   luaK_getlabel(fs);  /* close eventual list of pending jumps */
   removelocalvars(ls, fs->nactloc);
   luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
diff --git a/ltests.c b/ltests.c
index ae0c71fc..97c63dfb 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 1.54 2000/10/31 13:10:24 roberto Exp roberto $
+** $Id: ltests.c,v 1.55 2000/12/28 12:55:41 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -53,7 +53,7 @@ static void setnameval (lua_State *L, const char *name, int val) {
 
 
 static const char *const instrname[NUM_OPCODES] = {
-  "END", "RETURN", "CALL", "TAILCALL", "PUSHNIL", "POP", "PUSHINT", 
+  "RETURN", "CALL", "TAILCALL", "PUSHNIL", "POP", "PUSHINT", 
   "PUSHSTRING", "PUSHNUM", "PUSHNEGNUM", "PUSHUPVALUE", "GETLOCAL", 
   "GETGLOBAL", "GETTABLE", "GETDOTTED", "GETINDEXED", "PUSHSELF", 
   "CREATETABLE", "SETLOCAL", "SETGLOBAL", "SETTABLE", "SETLIST", "SETMAP", 
@@ -64,7 +64,7 @@ static const char *const instrname[NUM_OPCODES] = {
 };
 
 
-static int pushop (lua_State *L, Proto *p, int pc) {
+static void pushop (lua_State *L, Proto *p, int pc) {
   char buff[100];
   Instruction i = p->code[pc];
   OpCode o = GET_OPCODE(i);
@@ -85,26 +85,23 @@ static int pushop (lua_State *L, Proto *p, int pc) {
       break;
   }
   lua_pushstring(L, buff);
-  return (o != OP_END);
 }
 
 
 static int listcode (lua_State *L) {
   int pc;
   Proto *p;
-  int res;
   luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
                  1, "Lua function expected");
   p = clvalue(luaA_index(L, 1))->f.l;
   lua_newtable(L);
   setnameval(L, "maxstack", p->maxstacksize);
   setnameval(L, "numparams", p->numparams);
-  pc = 0;
-  do {
+  for (pc=0; pc<p->sizecode; pc++) {
     lua_pushnumber(L, pc+1);
-    res = pushop(L, p, pc++);
+    pushop(L, p, pc);
     lua_settable(L, -3);
-  } while (res);
+  }
   return 1;
 }
 
diff --git a/lundump.c b/lundump.c
index 0a856747..1711e4f0 100644
--- a/lundump.c
+++ b/lundump.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c,v 1.36 2000/12/28 12:55:41 roberto Exp roberto $
+** $Id: lundump.c,v 1.37 2000/12/28 12:59:41 roberto Exp roberto $
 ** load bytecodes from files
 ** See Copyright Notice in lua.h
 */
@@ -108,7 +108,6 @@ static void LoadCode (lua_State* L, Proto* tf, ZIO* Z, int swap)
  tf->code=luaM_newvector(L,size,Instruction);
  tf->sizecode=size;
  LoadVector(L,tf->code,size,sizeof(*tf->code),Z,swap);
- if (tf->code[size-1]!=OP_END) luaO_verror(L,"bad code in `%.99s'",ZNAME(Z));
 }
 
 static void LoadLocals (lua_State* L, Proto* tf, ZIO* Z, int swap)
diff --git a/lvm.c b/lvm.c
index fd5481bc..a589dd2c 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 1.151 2001/01/10 18:56:11 roberto Exp roberto $
+** $Id: lvm.c,v 1.152 2001/01/11 18:59:32 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -360,10 +360,6 @@ StkId luaV_execute (lua_State *L, const Closure *cl, StkId base) {
     if (linehook)
       traceexec(L, base, top, linehook);
     switch (GET_OPCODE(i)) {
-      case OP_END: {
-        L->top = top;
-        return top;
-      }
       case OP_RETURN: {
         L->top = top;
         return base+GETARG_U(i);