Update embedded Lua to 5.1.5 (#7387)

14 files changed, 36 insertions, 33 deletions

diff --git a/lib/lua/COPYRIGHT b/lib/lua/COPYRIGHT
index 3a53e741e..a86026803 100644
--- a/lib/lua/COPYRIGHT
+++ b/lib/lua/COPYRIGHT
@@ -9,7 +9,7 @@ For details and rationale, see http://www.lua.org/license.html .
 
 ===============================================================================
 
-Copyright (C) 1994-2008 Lua.org, PUC-Rio.
+Copyright (C) 1994-2012 Lua.org, PUC-Rio.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/lib/lua/src/lauxlib.c b/lib/lua/src/lauxlib.c
index be41ebcd3..10f14e2c0 100644
--- a/lib/lua/src/lauxlib.c
+++ b/lib/lua/src/lauxlib.c
@@ -574,8 +574,7 @@ LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
     lf.f = freopen(filename, "rb", lf.f);  /* reopen in binary mode */
     if (lf.f == NULL) return errfile(L, "reopen", fnameindex);
     /* skip eventual `#!...' */
-   while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0])
-	{}
+   while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
     lf.extraline = 0;
   }
   ungetc(c, lf.f);
diff --git a/lib/lua/src/lbaselib.c b/lib/lua/src/lbaselib.c
index 2a4c079d3..2ab550bd4 100644
--- a/lib/lua/src/lbaselib.c
+++ b/lib/lua/src/lbaselib.c
@@ -631,7 +631,7 @@ static void base_open (lua_State *L) {
   luaL_register(L, "_G", base_funcs);
   lua_pushliteral(L, LUA_VERSION);
   lua_setglobal(L, "_VERSION");  /* set global _VERSION */
-  /* `ipairs' and `pairs' need auxliliary functions as upvalues */
+  /* `ipairs' and `pairs' need auxiliary functions as upvalues */
   auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
   auxopen(L, "pairs", luaB_pairs, luaB_next);
   /* `newproxy' needs a weaktable as upvalue */
diff --git a/lib/lua/src/lcode.c b/lib/lua/src/lcode.c
index cff626b7f..679cb9cfd 100644
--- a/lib/lua/src/lcode.c
+++ b/lib/lua/src/lcode.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 2.25.1.3 2007/12/28 15:32:23 roberto Exp $
+** $Id: lcode.c,v 2.25.1.5 2011/01/31 14:53:16 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -544,10 +544,6 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
       pc = NO_JUMP;  /* always true; do nothing */
       break;
     }
-    case VFALSE: {
-      pc = luaK_jump(fs);  /* always jump */
-      break;
-    }
     case VJMP: {
       invertjump(fs, e);
       pc = e->u.s.info;
@@ -572,10 +568,6 @@ static void luaK_goiffalse (FuncState *fs, expdesc *e) {
       pc = NO_JUMP;  /* always false; do nothing */
       break;
     }
-    case VTRUE: {
-      pc = luaK_jump(fs);  /* always jump */
-      break;
-    }
     case VJMP: {
       pc = e->u.s.info;
       break;
diff --git a/lib/lua/src/ldblib.c b/lib/lua/src/ldblib.c
index 67de1222a..2027eda59 100644
--- a/lib/lua/src/ldblib.c
+++ b/lib/lua/src/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.104.1.3 2008/01/21 13:11:21 roberto Exp $
+** $Id: ldblib.c,v 1.104.1.4 2009/08/04 18:50:18 roberto Exp $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -45,6 +45,7 @@ static int db_setmetatable (lua_State *L) {
 
 
 static int db_getfenv (lua_State *L) {
+  luaL_checkany(L, 1);
   lua_getfenv(L, 1);
   return 1;
 }
diff --git a/lib/lua/src/ldo.c b/lib/lua/src/ldo.c
index 8de05f728..d1bf786cb 100644
--- a/lib/lua/src/ldo.c
+++ b/lib/lua/src/ldo.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 2.38.1.3 2008/01/18 22:31:22 roberto Exp $
+** $Id: ldo.c,v 2.38.1.4 2012/01/18 02:27:10 roberto Exp $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -217,6 +217,7 @@ static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
     int nvar = actual - nfixargs;  /* number of extra arguments */
     lua_assert(p->is_vararg & VARARG_HASARG);
     luaC_checkGC(L);
+    luaD_checkstack(L, p->maxstacksize);
     htab = luaH_new(L, nvar, 1);  /* create `arg' table */
     for (i=0; i<nvar; i++)  /* put extra arguments into `arg' table */
       setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i);
diff --git a/lib/lua/src/lgc.c b/lib/lua/src/lgc.c
index d9e0b7829..e909c79a9 100644
--- a/lib/lua/src/lgc.c
+++ b/lib/lua/src/lgc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 2.38.1.1 2007/12/27 13:02:25 roberto Exp $
+** $Id: lgc.c,v 2.38.1.2 2011/03/18 18:05:38 roberto Exp $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -627,7 +627,6 @@ void luaC_step (lua_State *L) {
     }
   }
   else {
-    lua_assert(g->totalbytes >= g->estimate);
     setthreshold(g);
   }
 }
diff --git a/lib/lua/src/liolib.c b/lib/lua/src/liolib.c
index e79ed1cb2..649f9a595 100644
--- a/lib/lua/src/liolib.c
+++ b/lib/lua/src/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.73.1.3 2008/01/18 17:47:43 roberto Exp $
+** $Id: liolib.c,v 2.73.1.4 2010/05/14 15:33:51 roberto Exp $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -276,7 +276,10 @@ static int read_number (lua_State *L, FILE *f) {
     lua_pushnumber(L, d);
     return 1;
   }
-  else return 0;  /* read fails */
+  else {
+    lua_pushnil(L);  /* "result" to be removed */
+    return 0;  /* read fails */
+  }
 }
 
 
diff --git a/lib/lua/src/llex.c b/lib/lua/src/llex.c
index 98068c1aa..d1b179670 100644
--- a/lib/lua/src/llex.c
+++ b/lib/lua/src/llex.c
@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.20.1.1 2007/12/27 13:02:25 roberto Exp $
+** $Id: llex.c,v 2.20.1.2 2009/11/23 14:58:22 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -118,8 +118,10 @@ TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   lua_State *L = ls->L;
   TString *ts = luaS_newlstr(L, str, l);
   TValue *o = luaH_setstr(L, ls->fs->h, ts);  /* entry for `str' */
-  if (ttisnil(o))
+  if (ttisnil(o)) {
     setbvalue(o, 1);  /* make sure `str' will not be collected */
+    luaC_checkGC(L);
+  }
   return ts;
 }
 
diff --git a/lib/lua/src/loadlib.c b/lib/lua/src/loadlib.c
index 0d401eba1..6158c5353 100644
--- a/lib/lua/src/loadlib.c
+++ b/lib/lua/src/loadlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.52.1.3 2008/08/06 13:29:28 roberto Exp $
+** $Id: loadlib.c,v 1.52.1.4 2009/09/09 13:17:16 roberto Exp $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -639,7 +639,7 @@ LUALIB_API int luaopen_package (lua_State *L) {
   lua_pushvalue(L, -1);
   lua_replace(L, LUA_ENVIRONINDEX);
   /* create `loaders' table */
-  lua_createtable(L, 0, sizeof(loaders)/sizeof(loaders[0]) - 1);
+  lua_createtable(L, sizeof(loaders)/sizeof(loaders[0]) - 1, 0);
   /* fill it with pre-defined loaders */
   for (i=0; loaders[i] != NULL; i++) {
     lua_pushcfunction(L, loaders[i]);
diff --git a/lib/lua/src/lparser.c b/lib/lua/src/lparser.c
index 1e2a9a88b..dda7488dc 100644
--- a/lib/lua/src/lparser.c
+++ b/lib/lua/src/lparser.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.42.1.3 2007/12/28 15:32:23 roberto Exp $
+** $Id: lparser.c,v 2.42.1.4 2011/10/21 19:31:42 roberto Exp $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -374,9 +374,9 @@ static void close_func (LexState *ls) {
   lua_assert(luaG_checkcode(f));
   lua_assert(fs->bl == NULL);
   ls->fs = fs->prev;
-  L->top -= 2;  /* remove table and prototype from the stack */
   /* last token read was anchored in defunct function; must reanchor it */
   if (fs) anchor_token(ls);
+  L->top -= 2;  /* remove table and prototype from the stack */
 }
 
 
diff --git a/lib/lua/src/lstrlib.c b/lib/lua/src/lstrlib.c
index 1b4763d4e..7a03489be 100644
--- a/lib/lua/src/lstrlib.c
+++ b/lib/lua/src/lstrlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c,v 1.132.1.4 2008/07/11 17:27:21 roberto Exp $
+** $Id: lstrlib.c,v 1.132.1.5 2010/05/14 15:34:19 roberto Exp $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -754,6 +754,7 @@ static void addintlen (char *form) {
 
 
 static int str_format (lua_State *L) {
+  int top = lua_gettop(L);
   int arg = 1;
   size_t sfl;
   const char *strfrmt = luaL_checklstring(L, arg, &sfl);
@@ -768,7 +769,8 @@ static int str_format (lua_State *L) {
     else { /* format item */
       char form[MAX_FORMAT];  /* to store the format (`%...') */
       char buff[MAX_ITEM];  /* to store the formatted item */
-      arg++;
+      if (++arg > top)
+        luaL_argerror(L, arg, "no value");
       strfrmt = scanformat(L, strfrmt, form);
       switch (*strfrmt++) {
         case 'c': {
diff --git a/lib/lua/src/lua.h b/lib/lua/src/lua.h
index e4bdfd3b9..a4b73e743 100644
--- a/lib/lua/src/lua.h
+++ b/lib/lua/src/lua.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.218.1.5 2008/08/06 13:30:12 roberto Exp $
+** $Id: lua.h,v 1.218.1.7 2012/01/13 20:36:20 roberto Exp $
 ** Lua - An Extensible Extension Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -17,9 +17,9 @@
 
 
 #define LUA_VERSION	"Lua 5.1"
-#define LUA_RELEASE	"Lua 5.1.4"
+#define LUA_RELEASE	"Lua 5.1.5"
 #define LUA_VERSION_NUM	501
-#define LUA_COPYRIGHT	"Copyright (C) 1994-2008 Lua.org, PUC-Rio"
+#define LUA_COPYRIGHT	"Copyright (C) 1994-2012 Lua.org, PUC-Rio"
 #define LUA_AUTHORS 	"R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
 
 
@@ -362,7 +362,7 @@ struct lua_Debug {
 
 
 /******************************************************************************
-* Copyright (C) 1994-2008 Lua.org, PUC-Rio.  All rights reserved.
+* Copyright (C) 1994-2012 Lua.org, PUC-Rio.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
diff --git a/lib/lua/src/lvm.c b/lib/lua/src/lvm.c
index ee3256ab9..e0a0cd852 100644
--- a/lib/lua/src/lvm.c
+++ b/lib/lua/src/lvm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 2.63.1.3 2007/12/28 15:32:23 roberto Exp $
+** $Id: lvm.c,v 2.63.1.5 2011/08/17 20:43:11 roberto Exp $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -133,6 +133,7 @@ void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
 
 void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
   int loop;
+  TValue temp;
   for (loop = 0; loop < MAXTAGLOOP; loop++) {
     const TValue *tm;
     if (ttistable(t)) {  /* `t' is a table? */
@@ -141,6 +142,7 @@ void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
       if (!ttisnil(oldval) ||  /* result is no nil? */
           (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
         setobj2t(L, oldval, val);
+        h->flags = 0;
         luaC_barriert(L, h, val);
         return;
       }
@@ -152,7 +154,9 @@ void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
       callTM(L, tm, t, key, val);
       return;
     }
-    t = tm;  /* else repeat with `tm' */ 
+    /* else repeat with `tm' */
+    setobj(L, &temp, tm);  /* avoid pointing inside table (may rehash) */
+    t = &temp;
   }
   luaG_runerror(L, "loop in settable");
 }