diff -u -r lua-5.3.3/Makefile lua-5.3.4/Makefile --- lua-5.3.3/Makefile 2016-01-13 23:13:47.000000000 -0200 +++ lua-5.3.4/Makefile 2016-12-20 14:26:08.000000000 -0200 @@ -46,7 +46,7 @@ # Lua version and release. V= 5.3 -R= $V.3 +R= $V.4 # Targets start here. all: $(PLAT) diff -u -r lua-5.3.3/README lua-5.3.4/README --- lua-5.3.3/README 2016-05-30 13:12:16.000000000 -0300 +++ lua-5.3.4/README 2017-01-12 15:25:44.000000000 -0200 @@ -1,5 +1,5 @@ -This is Lua 5.3.3, released on 30 May 2016. +This is Lua 5.3.4, released on 12 Jan 2017. For installation instructions, license details, and further information about Lua, see doc/readme.html. diff -u -r lua-5.3.3/doc/contents.html lua-5.3.4/doc/contents.html --- lua-5.3.3/doc/contents.html 2016-01-14 10:14:29.000000000 -0200 +++ lua-5.3.4/doc/contents.html 2016-12-22 18:29:40.000000000 -0200 @@ -32,7 +32,7 @@

-Copyright © 2015–2016 Lua.org, PUC-Rio. +Copyright © 2015–2017 Lua.org, PUC-Rio. Freely available under the terms of the Lua license. @@ -512,6 +512,7 @@ luaL_newmetatable
luaL_newstate
luaL_openlibs
+luaL_opt
luaL_optinteger
luaL_optlstring
luaL_optnumber
@@ -608,10 +609,10 @@

Last update: -Thu Jan 14 10:14:28 BRST 2016 +Thu Dec 22 18:29:39 BRST 2016

Binary files lua-5.3.3/doc/logo.gif and lua-5.3.4/doc/logo.gif differ diff -u -r lua-5.3.3/doc/lua.1 lua-5.3.4/doc/lua.1 --- lua-5.3.3/doc/lua.1 2014-12-10 15:55:45.000000000 -0200 +++ lua-5.3.4/doc/lua.1 2016-10-17 13:43:50.000000000 -0200 @@ -1,4 +1,5 @@ -.TH LUA 1 "$Date: 2014/12/10 15:55:45 $" +.\" $Id: lua.man,v 1.14 2016/10/17 15:43:50 lhf Exp $ +.TH LUA 1 "$Date: 2016/10/17 15:43:50 $" .SH NAME lua \- Lua interpreter .SH SYNOPSIS diff -u -r lua-5.3.3/doc/manual.html lua-5.3.4/doc/manual.html --- lua-5.3.3/doc/manual.html 2016-05-30 13:11:09.000000000 -0300 +++ lua-5.3.4/doc/manual.html 2017-01-09 13:30:53.000000000 -0200 @@ -19,7 +19,7 @@

-Copyright © 2015–2016 Lua.org, PUC-Rio. +Copyright © 2015–2017 Lua.org, PUC-Rio. Freely available under the terms of the Lua license. @@ -35,7 +35,7 @@

- + @@ -216,7 +216,7 @@

Tables are the sole data-structuring mechanism in Lua; -they can be used to represent ordinary arrays, sequences, +they can be used to represent ordinary arrays, lists, symbol tables, sets, records, graphs, trees, etc. To represent records, Lua uses the field name as an index. The language supports this representation by @@ -226,13 +226,6 @@

-We use the term sequence to denote a table where -the set of all positive numeric keys is equal to {1..n} -for some non-negative integer n, -which is called the length of the sequence (see §3.4.7). - - -

Like indices, the values of table fields can be of any type. In particular, @@ -378,6 +371,9 @@ will call the message handler again. If this loop goes on for too long, Lua breaks it and returns an appropriate message. +(The message handler is called only for regular runtime errors. +It is not called for memory-allocation errors +nor for errors while running finalizers.) @@ -873,7 +869,7 @@

Only objects that have an explicit construction are removed from weak tables. -Values, such as numbers and light C functions, +Values, such as numbers and light C functions, are not subject to garbage collection, and therefore are not removed from weak tables (unless their associated values are collected). @@ -1084,7 +1080,7 @@ and is a reserved word, but And and AND are two different, valid names. As a convention, -programs should avoid creating +programs should avoid creating names that start with an underscore followed by one or more uppercase letters (such as _VERSION). @@ -1101,7 +1097,7 @@

-Literal strings +A short literal string can be delimited by matching single or double quotes, and can contain the following C-like escape sequences: '\a' (bell), @@ -1114,7 +1110,7 @@ '\\' (backslash), '\"' (quotation mark [double quote]), and '\'' (apostrophe [single quote]). -A backslash followed by a real newline +A backslash followed by a line break results in a newline in the string. The escape sequence '\z' skips the following span of white-space characters, @@ -1122,13 +1118,13 @@ it is particularly useful to break and indent a long literal string into multiple lines without adding the newlines and spaces into the string contents. +A short literal string cannot contain unescaped line breaks +nor escapes not forming a valid escape sequence.

-Strings in Lua can contain any 8-bit value, including embedded zeros, -which can be specified as '\0'. -More generally, -we can specify any byte in a literal string by its numeric value. +We can specify any byte in a short literal string by its numeric value +(including embedded zeros). This can be done with the escape sequence \xXX, where XX is a sequence of exactly two hexadecimal digits, @@ -1172,17 +1168,6 @@

-Any byte in a literal string not -explicitly affected by the previous rules represents itself. -However, Lua opens files for parsing in text mode, -and the system file functions may have problems with -some control characters. -So, it is safer to represent -non-text data as a quoted literal with -explicit escape sequences for the non-text characters. - - -

For convenience, when the opening long bracket is immediately followed by a newline, the newline is not included in the string. @@ -1203,6 +1188,17 @@

+Any byte in a literal string not +explicitly affected by the previous rules represents itself. +However, Lua opens files for parsing in text mode, +and the system file functions may have problems with +some control characters. +So, it is safer to represent +non-text data as a quoted literal with +explicit escape sequences for the non-text characters. + + +

A numeric constant (or numeral) can be written with an optional fractional part and an optional decimal exponent, @@ -1212,7 +1208,7 @@ Hexadecimal constants also accept an optional fractional part plus an optional binary exponent, marked by a letter 'p' or 'P'. -A numeric constant with a radix point or an exponent +A numeric constant with a radix point or an exponent denotes a float; otherwise, if its value fits in an integer, @@ -1897,7 +1893,7 @@

-Floor division (//) is a division +Floor division (//) is a division that rounds the quotient towards minus infinity, that is, the floor of the division of its operands. @@ -1959,7 +1955,7 @@ The C API also converts both integers to floats and floats to integers, as needed. Moreover, string concatenation accepts numbers as arguments, -besides strings. +besides strings.

@@ -1997,7 +1993,7 @@

-All conversions from strings to numbers +All conversions from strings to numbers accept both a dot and the current locale mark as the radix character. (The Lua lexer, however, accepts only a dot.) @@ -2140,37 +2136,66 @@

The length operator is denoted by the unary prefix operator #. + + +

The length of a string is its number of bytes (that is, the usual meaning of string length when each character is one byte).

-A program can modify the behavior of the length operator for -any value but strings through the __len metamethod (see §2.4). +The length operator applied on a table +returns a border in that table. +A border in a table t is any natural number +that satisfies the following condition: + +

+     (border == 0 or t[border] ~= nil) and t[border + 1] == nil
+

+In words, +a border is any (natural) index in a table +where a non-nil value is followed by a nil value +(or zero, when index 1 is nil).

-Unless a __len metamethod is given, -the length of a table t is only defined if the -table is a sequence, -that is, -the set of its positive numeric keys is equal to {1..n} -for some non-negative integer n. -In that case, n is its length. -Note that a table like - -

-     {10, 20, nil, 40}
-

-is not a sequence, because it has the key 4 -but does not have the key 3. -(So, there is no n such that the set {1..n} is equal -to the set of positive numeric keys of that table.) -Note, however, that non-numeric keys do not interfere +A table with exactly one border is called a sequence. +For instance, the table {10, 20, 30, 40, 50} is a sequence, +as it has only one border (5). +The table {10, 20, 30, nil, 50} has two borders (3 and 5), +and therefore it is not a sequence. +The table {nil, 20, 30, nil, nil, 60, nil} +has three borders (0, 3, and 6), +so it is not a sequence, too. +The table {} is a sequence with border 0. +Note that non-natural keys do not interfere with whether a table is a sequence. +

+When t is a sequence, +#t returns its only border, +which corresponds to the intuitive notion of the length of the sequence. +When t is not a sequence, +#t can return any of its borders. +(The exact one depends on details of +the internal representation of the table, +which in turn can depend on how the table was populated and +the memory addresses of its non-numeric keys.) + + +

+The computation of the length of a table +has a guaranteed worst time of O(log n), +where n is the largest natural key in the table. + + +

+A program can modify the behavior of the length operator for +any value but strings through the __len metamethod (see §2.4). + + @@ -2585,6 +2610,28 @@ with the macro LUA_USE_APICHECK defined. +

+The Lua library is fully reentrant: +it has no global variables. +It keeps all information it needs in a dynamic structure, +called the Lua state. + + +

+Each Lua state has one or more threads, +which correspond to independent, cooperative lines of execution. +The type lua_State (despite its name) refers to a thread. +(Indirectly, through the thread, it also refers to the +Lua state associated to the thread.) + + +

+A pointer to a thread must be passed as the first argument to +every function in the library, except to lua_newstate, +which creates a Lua state from scratch and returns a pointer +to the main thread in the new state. + +

4.1 – The Stack

@@ -2592,6 +2639,8 @@ Lua uses a virtual stack to pass values to and from C. Each element in this stack represents a Lua value (nil, number, string, etc.). +Functions in the API can access this stack through the +Lua state parameter that they receive.

@@ -2599,7 +2648,8 @@ which is independent of previous stacks and of stacks of C functions that are still active. This stack initially contains any arguments to the C function -and it is where the C function pushes its results +and it is where the C function can store temporary +Lua values and must push its results to be returned to the caller (see lua_CFunction). @@ -2791,8 +2841,7 @@ (Lua will use exceptions if you compile it as C++; search for LUAI_THROW in the source code for details.) When Lua faces any error -(such as a memory allocation error, type errors, syntax errors, -and runtime errors) +(such as a memory allocation error or a type error) it raises an error; that is, it does a long jump. A protected environment uses setjmp @@ -2801,6 +2850,17 @@

+Inside a C function you can raise an error by calling lua_error. + + +

+Most functions in the API can raise an error, +for instance due to a memory allocation error. +The documentation for each function indicates whether +it can raise errors. + + +

If an error happens outside any protected environment, Lua calls a panic function (see lua_atpanic) and then calls abort, @@ -2811,6 +2871,23 @@

+The panic function, +as its name implies, +is a mechanism of last resort. +Programs should avoid it. +As a general rule, +when a C function is called by Lua with a Lua state, +it can do whatever it wants on that Lua state, +as it should be already protected. +However, +when C code operates on other Lua states +(e.g., a Lua parameter to the function, +a Lua state stored in the registry, or +the result of lua_newthread), +it should use them only in API calls that cannot raise errors. + + +

The panic function runs as if it were a message handler (see §2.3); in particular, the error object is at the top of the stack. However, there is no guarantee about stack space. @@ -2818,17 +2895,6 @@ the panic function must first check the available space (see §4.2). -

-Most functions in the API can raise an error, -for instance due to a memory allocation error. -The documentation for each function indicates whether -it can raise errors. - - -

-Inside a C function you can raise an error by calling lua_error. - - @@ -2836,7 +2902,7 @@

Internally, Lua uses the C longjmp facility to yield a coroutine. -Therefore, if a C function foo calls an API function +Therefore, if a C function foo calls an API function and this API function yields (directly or indirectly by calling another function that yields), Lua cannot return to foo any more, @@ -2854,7 +2920,7 @@

We need to set some terminology to explain continuations. -We have a C function called from Lua which we will call +We have a C function called from Lua which we will call the original function. This original function then calls one of those three functions in the C API, which we will call the callee function, @@ -3169,7 +3235,7 @@ The function results are pushed onto the stack when the function returns. The number of results is adjusted to nresults, unless nresults is LUA_MULTRET. -In this case, all results from the function are pushed. +In this case, all results from the function are pushed; Lua takes care that the returned values fit into the stack space, but it does not ensure any extra space in the stack. The function results are pushed onto the stack in direct order @@ -3655,7 +3721,7 @@ 

int lua_getuservalue (lua_State *L, int index);

-Pushes onto the stack the Lua value associated with the userdata +Pushes onto the stack the Lua value associated with the full userdata at the given index. @@ -3998,7 +4064,8 @@ Returns NULL if it cannot create the thread or the state (due to lack of memory). The argument f is the allocator function; -Lua does all memory allocation for this state through this function. +Lua does all memory allocation for this state +through this function (see lua_Alloc). The second argument, ud, is an opaque pointer that Lua passes to the allocator in every call. @@ -4202,7 +4269,9 @@

  • LUA_ERRGCMM: error while running a __gc metamethod. -(This error typically has no relation with the function being called.) +For such errors, Lua does not call the message handler +(as this kind of error typically has no relation +with the function being called).
    • @@ -4278,7 +4347,7 @@

    When n is zero, -this function creates a light C function, +this function creates a light C function, which is just a pointer to the C function. In that case, it never raises a memory error. @@ -4292,7 +4361,7 @@

    Pushes a C function onto the stack. -This function receives a pointer to a C function +This function receives a pointer to a C function and pushes onto the stack a Lua value of type function that, when called, invokes the corresponding C function. @@ -4667,7 +4736,7 @@ 

    void lua_register (lua_State *L, const char *name, lua_CFunction f);

    -Sets the C function f as the new value of global name. +Sets the C function f as the new value of global name. It is defined as a macro: 

    @@ -4888,7 +4957,7 @@
 
 
    
 Pops a value from the stack and sets it as
-the new value associated to the userdata at the given index.
+the new value associated to the full userdata at the given index.
 
 
 
@@ -5302,7 +5371,7 @@
 
    
 When the coroutine is resumed again,
 Lua calls the given continuation function k to continue
-the execution of the C function that yielded (see §4.7).
+the execution of the C function that yielded (see §4.7).
 This continuation function receives the same stack
 from the previous function,
 with the n results removed and
@@ -6013,7 +6082,7 @@
 
 
    
 Raises an error reporting a problem with argument arg
-of the C function that called it,
+of the C function that called it,
 using a standard message
 that includes extramsg as a comment:
 
@@ -6534,7 +6603,8 @@
 
    
 This function returns the same results as lua_load,
 but it has an extra error code LUA_ERRFILE
-if it cannot open/read the file or the file has a wrong mode.
+for file-related errors
+(e.g., it cannot open or read the file).
 
 
 
    
@@ -6727,6 +6797,11 @@
 its length is considered zero.
 
 
+
    
+This function uses lua_tolstring to get its result,
+so all conversions and caveats of that function apply here.
+
+
 
 
 
@@ -7674,7 +7749,7 @@
 
 
    
 A running coroutine is yieldable if it is not the main thread and
-it is not inside a non-yieldable C function.
+it is not inside a non-yieldable C function.
 
 
 
@@ -7876,8 +7951,8 @@
 
    
 Lua initializes the C path package.cpath in the same way
 it initializes the Lua path package.path,
-using the environment variable LUA_CPATH_5_3
-or the environment variable LUA_CPATH
+using the environment variable LUA_CPATH_5_3,
+or the environment variable LUA_CPATH,
 or a default path defined in luaconf.h.
 
 
@@ -8434,7 +8509,7 @@
 
    
 Returns a binary string containing the values v1, v2, etc.
 packed (that is, serialized in binary form)
-according to the format string fmt (see §6.4.2). 
+according to the format string fmt (see §6.4.2).
 
 
 
@@ -8485,7 +8560,8 @@
 In particular,
 the call string.sub(s,1,j) returns a prefix of s
 with length j,
-and string.sub(s, -i) returns a suffix of s
+and string.sub(s, -i) (for a positive i)
+returns a suffix of s
 with length i.
 
 
@@ -8902,7 +8978,7 @@
 that start between positions i and j (both inclusive).
 The default for i is 1 and for j is -1.
 If it finds any invalid byte sequence,
-returns a false value plus the position of the first invalid byte. 
+returns a false value plus the position of the first invalid byte.
 
 
 
@@ -8946,8 +9022,7 @@
 
 
    
 Remember that, whenever an operation needs the length of a table,
-the table must be a proper sequence
-or have a __len metamethod (see §3.4.7).
+all caveats about the length operator apply (see §3.4.7).
 All functions ignore non-numeric keys
 in the tables given as arguments.
 
@@ -9063,9 +9138,8 @@
 
 
 
    
-The sort algorithm is not stable;
-that is, elements not comparable by the given order
-(e.g., equal elements)
+The sort algorithm is not stable:
+elements considered equal by the given order
 may have their relative positions changed by the sort.
 
 
@@ -9401,7 +9475,7 @@
 
 
    
 Returns a boolean,
-true if integer m is below integer n when
+true if and only if integer m is below integer n when
 they are compared as unsigned integers.
 
 
@@ -9987,6 +10061,7 @@
 with the given name.
 If this function fails, it returns nil,
 plus a string describing the error and the error code.
+Otherwise, it returns true.
 
 
 
@@ -9996,9 +10071,10 @@
 
 
 
    
-Renames file or directory named oldname to newname.
+Renames the file or directory named oldname to newname.
 If this function fails, it returns nil,
 plus a string describing the error and the error code.
+Otherwise, it returns true.
 
 
 
@@ -10291,7 +10367,7 @@
 
 
    
 Returns the Lua value associated to u.
-If u is not a userdata,
+If u is not a full userdata,
 returns nil.
 
 
@@ -10490,7 +10566,7 @@
 
 
 
    
-When called without option -E, 
+When called without option -E,
 the interpreter checks for an environment variable LUA_INIT_5_3
 (or LUA_INIT if the versioned name is not defined)
 before running any argument.
@@ -10582,7 +10658,7 @@
 
    
 In case of unprotected errors in the script,
 the interpreter reports the error to the standard error stream.
-If the error object is not a string but 
+If the error object is not a string but
 has a metamethod __tostring,
 the interpreter calls this metamethod to produce the final message.
 Otherwise, the interpreter converts the error object to a string
@@ -10897,13 +10973,12 @@
 
 
 
-
 
    
 Last update:
-Mon May 30 13:11:08 BRT 2016
+Mon Jan  9 13:30:53 BRST 2017
 
    
 
 
 
diff -u -r lua-5.3.3/doc/readme.html lua-5.3.4/doc/readme.html
--- lua-5.3.3/doc/readme.html	2016-02-02 22:25:28.000000000 -0200
+++ lua-5.3.4/doc/readme.html	2016-12-22 18:22:57.000000000 -0200
@@ -328,7 +328,7 @@
 this.
 
 
    
-Copyright © 1994–2016 Lua.org, PUC-Rio.
+Copyright © 1994–2017 Lua.org, PUC-Rio.
 
 
    
 Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -355,10 +355,10 @@
 
 
    
 Last update:
-Tue Feb  2 22:25:27 BRST 2016
+Thu Dec 22 18:22:57 BRST 2016
 
    
 
 
 
diff -u -r lua-5.3.3/src/lauxlib.c lua-5.3.4/src/lauxlib.c
--- lua-5.3.3/src/lauxlib.c	2016-01-08 13:33:09.000000000 -0200
+++ lua-5.3.4/src/lauxlib.c	2016-12-20 16:37:00.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.286 2016/01/08 15:33:09 roberto Exp $
+** $Id: lauxlib.c,v 1.289 2016/12/20 18:37:00 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -69,12 +69,11 @@
 
 /*
 ** Search for a name for a function in all loaded modules
-** (registry._LOADED).
 */
 static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
   int top = lua_gettop(L);
   lua_getinfo(L, "f", ar);  /* push function */
-  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
   if (findfield(L, top + 1, 2)) {
     const char *name = lua_tostring(L, -1);
     if (strncmp(name, "_G.", 3) == 0) {  /* name start with '_G.'? */
@@ -809,13 +808,17 @@
 
 
 LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
-  if (!luaL_callmeta(L, idx, "__tostring")) {  /* no metafield? */
+  if (luaL_callmeta(L, idx, "__tostring")) {  /* metafield? */
+    if (!lua_isstring(L, -1))
+      luaL_error(L, "'__tostring' must return a string");
+  }
+  else {
     switch (lua_type(L, idx)) {
       case LUA_TNUMBER: {
         if (lua_isinteger(L, idx))
-          lua_pushfstring(L, "%I", lua_tointeger(L, idx));
+          lua_pushfstring(L, "%I", (LUAI_UACINT)lua_tointeger(L, idx));
         else
-          lua_pushfstring(L, "%f", lua_tonumber(L, idx));
+          lua_pushfstring(L, "%f", (LUAI_UACNUMBER)lua_tonumber(L, idx));
         break;
       }
       case LUA_TSTRING:
@@ -827,10 +830,15 @@
       case LUA_TNIL:
         lua_pushliteral(L, "nil");
         break;
-      default:
-        lua_pushfstring(L, "%s: %p", luaL_typename(L, idx),
-                                            lua_topointer(L, idx));
+      default: {
+        int tt = luaL_getmetafield(L, idx, "__name");  /* try name */
+        const char *kind = (tt == LUA_TSTRING) ? lua_tostring(L, -1) :
+                                                 luaL_typename(L, idx);
+        lua_pushfstring(L, "%s: %p", kind, lua_topointer(L, idx));
+        if (tt != LUA_TNIL)
+          lua_remove(L, -2);  /* remove '__name' */
         break;
+      }
     }
   }
   return lua_tolstring(L, -1, len);
@@ -882,23 +890,23 @@
 
 /*
 ** Find or create a module table with a given name. The function
-** first looks at the _LOADED table and, if that fails, try a
+** first looks at the LOADED table and, if that fails, try a
 ** global variable with that name. In any case, leaves on the stack
 ** the module table.
 */
 LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
                                  int sizehint) {
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
-  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no _LOADED[modname]? */
+  luaL_findtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE, 1);
+  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no LOADED[modname]? */
     lua_pop(L, 1);  /* remove previous result */
     /* try global variable (and create one if it does not exist) */
     lua_pushglobaltable(L);
     if (luaL_findtable(L, 0, modname, sizehint) != NULL)
       luaL_error(L, "name conflict for module '%s'", modname);
     lua_pushvalue(L, -1);
-    lua_setfield(L, -3, modname);  /* _LOADED[modname] = new table */
+    lua_setfield(L, -3, modname);  /* LOADED[modname] = new table */
   }
-  lua_remove(L, -2);  /* remove _LOADED table */
+  lua_remove(L, -2);  /* remove LOADED table */
 }
 
 
@@ -962,17 +970,17 @@
 */
 LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
                                lua_CFunction openf, int glb) {
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, -1, modname);  /* _LOADED[modname] */
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
+  lua_getfield(L, -1, modname);  /* LOADED[modname] */
   if (!lua_toboolean(L, -1)) {  /* package not already loaded? */
     lua_pop(L, 1);  /* remove field */
     lua_pushcfunction(L, openf);
     lua_pushstring(L, modname);  /* argument to open function */
     lua_call(L, 1, 1);  /* call 'openf' to open module */
     lua_pushvalue(L, -1);  /* make copy of module (call result) */
-    lua_setfield(L, -3, modname);  /* _LOADED[modname] = module */
+    lua_setfield(L, -3, modname);  /* LOADED[modname] = module */
   }
-  lua_remove(L, -2);  /* remove _LOADED table */
+  lua_remove(L, -2);  /* remove LOADED table */
   if (glb) {
     lua_pushvalue(L, -1);  /* copy of module */
     lua_setglobal(L, modname);  /* _G[modname] = module */
@@ -1030,6 +1038,6 @@
     luaL_error(L, "multiple Lua VMs detected");
   else if (*v != ver)
     luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
-                  ver, *v);
+                  (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)*v);
 }
 
diff -u -r lua-5.3.3/src/lauxlib.h lua-5.3.4/src/lauxlib.h
--- lua-5.3.3/src/lauxlib.h	2015-11-23 09:29:43.000000000 -0200
+++ lua-5.3.4/src/lauxlib.h	2016-12-06 12:54:31.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.129 2015/11/23 11:29:43 roberto Exp $
+** $Id: lauxlib.h,v 1.131 2016/12/06 14:54:31 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -16,10 +16,18 @@
 
 
 
-/* extra error code for 'luaL_load' */
+/* extra error code for 'luaL_loadfilex' */
 #define LUA_ERRFILE     (LUA_ERRERR+1)
 
 
+/* key, in the registry, for table of loaded modules */
+#define LUA_LOADED_TABLE	"_LOADED"
+
+
+/* key, in the registry, for table of preloaded loaders */
+#define LUA_PRELOAD_TABLE	"_PRELOAD"
+
+
 typedef struct luaL_Reg {
   const char *name;
   lua_CFunction func;
diff -u -r lua-5.3.3/src/lbaselib.c lua-5.3.4/src/lbaselib.c
--- lua-5.3.3/src/lbaselib.c	2016-04-11 16:18:40.000000000 -0300
+++ lua-5.3.4/src/lbaselib.c	2016-09-05 16:06:34.000000000 -0300
@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.313 2016/04/11 19:18:40 roberto Exp $
+** $Id: lbaselib.c,v 1.314 2016/09/05 19:06:34 roberto Exp $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -208,8 +208,8 @@
 
 static int pairsmeta (lua_State *L, const char *method, int iszero,
                       lua_CFunction iter) {
+  luaL_checkany(L, 1);
   if (luaL_getmetafield(L, 1, method) == LUA_TNIL) {  /* no metamethod? */
-    luaL_checktype(L, 1, LUA_TTABLE);  /* argument must be a table */
     lua_pushcfunction(L, iter);  /* will return generator, */
     lua_pushvalue(L, 1);  /* state, */
     if (iszero) lua_pushinteger(L, 0);  /* and initial value */
diff -u -r lua-5.3.3/src/lcode.c lua-5.3.4/src/lcode.c
--- lua-5.3.3/src/lcode.c	2016-05-13 16:09:21.000000000 -0300
+++ lua-5.3.4/src/lcode.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 2.109 2016/05/13 19:09:21 roberto Exp $
+** $Id: lcode.c,v 2.112 2016/12/22 13:08:50 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -40,7 +40,7 @@
 ** If expression is a numeric constant, fills 'v' with its value
 ** and returns 1. Otherwise, returns 0.
 */
-static int tonumeral(expdesc *e, TValue *v) {
+static int tonumeral(const expdesc *e, TValue *v) {
   if (hasjumps(e))
     return 0;  /* not a numeral */
   switch (e->k) {
@@ -86,7 +86,7 @@
 /*
 ** Gets the destination address of a jump instruction. Used to traverse
 ** a list of jumps.
-*/ 
+*/
 static int getjump (FuncState *fs, int pc) {
   int offset = GETARG_sBx(fs->f->code[pc]);
   if (offset == NO_JUMP)  /* point to itself represents end of list */
@@ -754,7 +754,7 @@
 ** (that is, it is either in a register or in 'k' with an index
 ** in the range of R/K indices).
 ** Returns R/K index.
-*/  
+*/
 int luaK_exp2RK (FuncState *fs, expdesc *e) {
   luaK_exp2val(fs, e);
   switch (e->k) {  /* move constants to 'k' */
@@ -975,7 +975,8 @@
 ** Try to "constant-fold" an operation; return 1 iff successful.
 ** (In this case, 'e1' has the final result.)
 */
-static int constfolding (FuncState *fs, int op, expdesc *e1, expdesc *e2) {
+static int constfolding (FuncState *fs, int op, expdesc *e1,
+                                                const expdesc *e2) {
   TValue v1, v2, res;
   if (!tonumeral(e1, &v1) || !tonumeral(e2, &v2) || !validop(op, &v1, &v2))
     return 0;  /* non-numeric operands or not safe to fold */
@@ -1014,11 +1015,14 @@
 ** (everything but logical operators 'and'/'or' and comparison
 ** operators).
 ** Expression to produce final result will be encoded in 'e1'.
+** Because 'luaK_exp2RK' can free registers, its calls must be
+** in "stack order" (that is, first on 'e2', which may have more
+** recent registers to be released).
 */
 static void codebinexpval (FuncState *fs, OpCode op,
                            expdesc *e1, expdesc *e2, int line) {
-  int rk1 = luaK_exp2RK(fs, e1);  /* both operands are "RK" */
-  int rk2 = luaK_exp2RK(fs, e2);
+  int rk2 = luaK_exp2RK(fs, e2);  /* both operands are "RK" */
+  int rk1 = luaK_exp2RK(fs, e1);
   freeexps(fs, e1, e2);
   e1->u.info = luaK_codeABC(fs, op, 0, rk1, rk2);  /* generate opcode */
   e1->k = VRELOCABLE;  /* all those operations are relocatable */
@@ -1060,9 +1064,9 @@
 ** Aplly prefix operation 'op' to expression 'e'.
 */
 void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line) {
-  static expdesc ef = {VKINT, {0}, NO_JUMP, NO_JUMP};  /* fake 2nd operand */
+  static const expdesc ef = {VKINT, {0}, NO_JUMP, NO_JUMP};
   switch (op) {
-    case OPR_MINUS: case OPR_BNOT:
+    case OPR_MINUS: case OPR_BNOT:  /* use 'ef' as fake 2nd operand */
       if (constfolding(fs, op + LUA_OPUNM, e, &ef))
         break;
       /* FALLTHROUGH */
diff -u -r lua-5.3.3/src/ldebug.c lua-5.3.4/src/ldebug.c
--- lua-5.3.3/src/ldebug.c	2016-03-31 16:01:21.000000000 -0300
+++ lua-5.3.4/src/ldebug.c	2016-10-19 10:32:10.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 2.120 2016/03/31 19:01:21 roberto Exp $
+** $Id: ldebug.c,v 2.121 2016/10/19 12:32:10 roberto Exp $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -38,7 +38,8 @@
 #define ci_func(ci)		(clLvalue((ci)->func))
 
 
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
+static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
+                                    const char **name);
 
 
 static int currentpc (CallInfo *ci) {
@@ -244,6 +245,20 @@
 }
 
 
+static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
+  if (ci == NULL)  /* no 'ci'? */
+    return NULL;  /* no info */
+  else if (ci->callstatus & CIST_FIN) {  /* is this a finalizer? */
+    *name = "__gc";
+    return "metamethod";  /* report it as such */
+  }
+  /* calling function is a known Lua function? */
+  else if (!(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
+    return funcnamefromcode(L, ci->previous, name);
+  else return NULL;  /* no way to find a name */
+}
+
+
 static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
                        Closure *f, CallInfo *ci) {
   int status = 1;
@@ -274,11 +289,7 @@
         break;
       }
       case 'n': {
-        /* calling function is a known Lua function? */
-        if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
-          ar->namewhat = getfuncname(L, ci->previous, &ar->name);
-        else
-          ar->namewhat = NULL;
+        ar->namewhat = getfuncname(L, ci, &ar->name);
         if (ar->namewhat == NULL) {
           ar->namewhat = "";  /* not found */
           ar->name = NULL;
@@ -471,8 +482,15 @@
 }
 
 
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
-  TMS tm = (TMS)0;  /* to avoid warnings */
+/*
+** Try to find a name for a function based on the code that called it.
+** (Only works when function was called by a Lua function.)
+** Returns what the name is (e.g., "for iterator", "method",
+** "metamethod") and sets '*name' to point to the name.
+*/
+static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
+                                     const char **name) {
+  TMS tm = (TMS)0;  /* (initial value avoids warnings) */
   Proto *p = ci_func(ci)->p;  /* calling function */
   int pc = currentpc(ci);  /* calling instruction index */
   Instruction i = p->code[pc];  /* calling instruction */
@@ -482,13 +500,13 @@
   }
   switch (GET_OPCODE(i)) {
     case OP_CALL:
-    case OP_TAILCALL:  /* get function name */
-      return getobjname(p, pc, GETARG_A(i), name);
+    case OP_TAILCALL:
+      return getobjname(p, pc, GETARG_A(i), name);  /* get function name */
     case OP_TFORCALL: {  /* for iterator */
       *name = "for iterator";
        return "for iterator";
     }
-    /* all other instructions can call only through metamethods */
+    /* other instructions can do calls through metamethods */
     case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
       tm = TM_INDEX;
       break;
@@ -509,7 +527,8 @@
     case OP_EQ: tm = TM_EQ; break;
     case OP_LT: tm = TM_LT; break;
     case OP_LE: tm = TM_LE; break;
-    default: lua_assert(0);  /* other instructions cannot call a function */
+    default:
+      return NULL;  /* cannot find a reasonable name */
   }
   *name = getstr(G(L)->tmname[tm]);
   return "metamethod";
diff -u -r lua-5.3.3/src/ldo.c lua-5.3.4/src/ldo.c
--- lua-5.3.3/src/ldo.c	2015-12-16 14:40:07.000000000 -0200
+++ lua-5.3.4/src/ldo.c	2016-12-13 13:52:21.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 2.151 2015/12/16 16:40:07 roberto Exp $
+** $Id: ldo.c,v 2.157 2016/12/13 15:52:21 roberto Exp $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -211,9 +211,9 @@
   CallInfo *ci;
   StkId lim = L->top;
   for (ci = L->ci; ci != NULL; ci = ci->previous) {
-    lua_assert(ci->top <= L->stack_last);
     if (lim < ci->top) lim = ci->top;
   }
+  lua_assert(lim <= L->stack_last);
   return cast_int(lim - L->stack) + 1;  /* part of stack in use */
 }
 
@@ -221,16 +221,19 @@
 void luaD_shrinkstack (lua_State *L) {
   int inuse = stackinuse(L);
   int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
-  if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
-  if (L->stacksize > LUAI_MAXSTACK)  /* was handling stack overflow? */
+  if (goodsize > LUAI_MAXSTACK)
+    goodsize = LUAI_MAXSTACK;  /* respect stack limit */
+  if (L->stacksize > LUAI_MAXSTACK)  /* had been handling stack overflow? */
     luaE_freeCI(L);  /* free all CIs (list grew because of an error) */
   else
     luaE_shrinkCI(L);  /* shrink list */
-  if (inuse <= LUAI_MAXSTACK &&  /* not handling stack overflow? */
-      goodsize < L->stacksize)  /* trying to shrink? */
-    luaD_reallocstack(L, goodsize);  /* shrink it */
-  else
-    condmovestack(L,,);  /* don't change stack (change only for debugging) */
+  /* if thread is currently not handling a stack overflow and its
+     good size is smaller than current size, shrink its stack */
+  if (inuse <= (LUAI_MAXSTACK - EXTRA_STACK) &&
+      goodsize < L->stacksize)
+    luaD_reallocstack(L, goodsize);
+  else  /* don't change stack */
+    condmovestack(L,{},{});  /* (change only for debugging) */
 }
 
 
@@ -322,6 +325,72 @@
 }
 
 
+/*
+** Given 'nres' results at 'firstResult', move 'wanted' of them to 'res'.
+** Handle most typical cases (zero results for commands, one result for
+** expressions, multiple results for tail calls/single parameters)
+** separated.
+*/
+static int moveresults (lua_State *L, const TValue *firstResult, StkId res,
+                                      int nres, int wanted) {
+  switch (wanted) {  /* handle typical cases separately */
+    case 0: break;  /* nothing to move */
+    case 1: {  /* one result needed */
+      if (nres == 0)   /* no results? */
+        firstResult = luaO_nilobject;  /* adjust with nil */
+      setobjs2s(L, res, firstResult);  /* move it to proper place */
+      break;
+    }
+    case LUA_MULTRET: {
+      int i;
+      for (i = 0; i < nres; i++)  /* move all results to correct place */
+        setobjs2s(L, res + i, firstResult + i);
+      L->top = res + nres;
+      return 0;  /* wanted == LUA_MULTRET */
+    }
+    default: {
+      int i;
+      if (wanted <= nres) {  /* enough results? */
+        for (i = 0; i < wanted; i++)  /* move wanted results to correct place */
+          setobjs2s(L, res + i, firstResult + i);
+      }
+      else {  /* not enough results; use all of them plus nils */
+        for (i = 0; i < nres; i++)  /* move all results to correct place */
+          setobjs2s(L, res + i, firstResult + i);
+        for (; i < wanted; i++)  /* complete wanted number of results */
+          setnilvalue(res + i);
+      }
+      break;
+    }
+  }
+  L->top = res + wanted;  /* top points after the last result */
+  return 1;
+}
+
+
+/*
+** Finishes a function call: calls hook if necessary, removes CallInfo,
+** moves current number of results to proper place; returns 0 iff call
+** wanted multiple (variable number of) results.
+*/
+int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
+  StkId res;
+  int wanted = ci->nresults;
+  if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) {
+    if (L->hookmask & LUA_MASKRET) {
+      ptrdiff_t fr = savestack(L, firstResult);  /* hook may change stack */
+      luaD_hook(L, LUA_HOOKRET, -1);
+      firstResult = restorestack(L, fr);
+    }
+    L->oldpc = ci->previous->u.l.savedpc;  /* 'oldpc' for caller function */
+  }
+  res = ci->func;  /* res == final position of 1st result */
+  L->ci = ci->previous;  /* back to caller */
+  /* move results to proper place */
+  return moveresults(L, firstResult, res, nres, wanted);
+}
+
+
 
 #define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
 
@@ -374,13 +443,13 @@
       int n = cast_int(L->top - func) - 1;  /* number of real arguments */
       int fsize = p->maxstacksize;  /* frame size */
       checkstackp(L, fsize, func);
-      if (p->is_vararg != 1) {  /* do not use vararg? */
+      if (p->is_vararg)
+        base = adjust_varargs(L, p, n);
+      else {  /* non vararg function */
         for (; n < p->numparams; n++)
           setnilvalue(L->top++);  /* complete missing arguments */
         base = func + 1;
       }
-      else
-        base = adjust_varargs(L, p, n);
       ci = next_ci(L);  /* now 'enter' new function */
       ci->nresults = nresults;
       ci->func = func;
@@ -403,72 +472,6 @@
 
 
 /*
-** Given 'nres' results at 'firstResult', move 'wanted' of them to 'res'.
-** Handle most typical cases (zero results for commands, one result for
-** expressions, multiple results for tail calls/single parameters)
-** separated.
-*/
-static int moveresults (lua_State *L, const TValue *firstResult, StkId res,
-                                      int nres, int wanted) {
-  switch (wanted) {  /* handle typical cases separately */
-    case 0: break;  /* nothing to move */
-    case 1: {  /* one result needed */
-      if (nres == 0)   /* no results? */
-        firstResult = luaO_nilobject;  /* adjust with nil */
-      setobjs2s(L, res, firstResult);  /* move it to proper place */
-      break;
-    }
-    case LUA_MULTRET: {
-      int i;
-      for (i = 0; i < nres; i++)  /* move all results to correct place */
-        setobjs2s(L, res + i, firstResult + i);
-      L->top = res + nres;
-      return 0;  /* wanted == LUA_MULTRET */
-    }
-    default: {
-      int i;
-      if (wanted <= nres) {  /* enough results? */
-        for (i = 0; i < wanted; i++)  /* move wanted results to correct place */
-          setobjs2s(L, res + i, firstResult + i);
-      }
-      else {  /* not enough results; use all of them plus nils */
-        for (i = 0; i < nres; i++)  /* move all results to correct place */
-          setobjs2s(L, res + i, firstResult + i);
-        for (; i < wanted; i++)  /* complete wanted number of results */
-          setnilvalue(res + i);
-      }
-      break;
-    }
-  }
-  L->top = res + wanted;  /* top points after the last result */
-  return 1;
-}
-
-
-/*
-** Finishes a function call: calls hook if necessary, removes CallInfo,
-** moves current number of results to proper place; returns 0 iff call
-** wanted multiple (variable number of) results.
-*/
-int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
-  StkId res;
-  int wanted = ci->nresults;
-  if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) {
-    if (L->hookmask & LUA_MASKRET) {
-      ptrdiff_t fr = savestack(L, firstResult);  /* hook may change stack */
-      luaD_hook(L, LUA_HOOKRET, -1);
-      firstResult = restorestack(L, fr);
-    }
-    L->oldpc = ci->previous->u.l.savedpc;  /* 'oldpc' for caller function */
-  }
-  res = ci->func;  /* res == final position of 1st result */
-  L->ci = ci->previous;  /* back to caller */
-  /* move results to proper place */
-  return moveresults(L, firstResult, res, nres, wanted);
-}
-
-
-/*
 ** Check appropriate error for stack overflow ("regular" overflow or
 ** overflow while handling stack overflow). If 'nCalls' is larger than
 ** LUAI_MAXCCALLS (which means it is handling a "regular" overflow) but
@@ -520,19 +523,17 @@
   /* error status can only happen in a protected call */
   lua_assert((ci->callstatus & CIST_YPCALL) || status == LUA_YIELD);
   if (ci->callstatus & CIST_YPCALL) {  /* was inside a pcall? */
-    ci->callstatus &= ~CIST_YPCALL;  /* finish 'lua_pcall' */
-    L->errfunc = ci->u.c.old_errfunc;
+    ci->callstatus &= ~CIST_YPCALL;  /* continuation is also inside it */
+    L->errfunc = ci->u.c.old_errfunc;  /* with the same error function */
   }
   /* finish 'lua_callk'/'lua_pcall'; CIST_YPCALL and 'errfunc' already
      handled */
   adjustresults(L, ci->nresults);
-  /* call continuation function */
   lua_unlock(L);
-  n = (*ci->u.c.k)(L, status, ci->u.c.ctx);
+  n = (*ci->u.c.k)(L, status, ci->u.c.ctx);  /* call continuation function */
   lua_lock(L);
   api_checknelems(L, n);
-  /* finish 'luaD_precall' */
-  luaD_poscall(L, ci, L->top - n, n);
+  luaD_poscall(L, ci, L->top - n, n);  /* finish 'luaD_precall' */
 }
 
 
@@ -595,15 +596,16 @@
 
 
 /*
-** signal an error in the call to 'resume', not in the execution of the
-** coroutine itself. (Such errors should not be handled by any coroutine
-** error handler and should not kill the coroutine.)
+** Signal an error in the call to 'lua_resume', not in the execution
+** of the coroutine itself. (Such errors should not be handled by any
+** coroutine error handler and should not kill the coroutine.)
 */
-static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
-  L->top = firstArg;  /* remove args from the stack */
+static int resume_error (lua_State *L, const char *msg, int narg) {
+  L->top -= narg;  /* remove args from the stack */
   setsvalue2s(L, L->top, luaS_new(L, msg));  /* push error message */
   api_incr_top(L);
-  luaD_throw(L, -1);  /* jump back to 'lua_resume' */
+  lua_unlock(L);
+  return LUA_ERRRUN;
 }
 
 
@@ -615,22 +617,15 @@
 ** coroutine.
 */
 static void resume (lua_State *L, void *ud) {
-  int nCcalls = L->nCcalls;
   int n = *(cast(int*, ud));  /* number of arguments */
   StkId firstArg = L->top - n;  /* first argument */
   CallInfo *ci = L->ci;
-  if (nCcalls >= LUAI_MAXCCALLS)
-    resume_error(L, "C stack overflow", firstArg);
-  if (L->status == LUA_OK) {  /* may be starting a coroutine */
-    if (ci != &L->base_ci)  /* not in base level? */
-      resume_error(L, "cannot resume non-suspended coroutine", firstArg);
-    /* coroutine is in base level; start running it */
+  if (L->status == LUA_OK) {  /* starting a coroutine? */
     if (!luaD_precall(L, firstArg - 1, LUA_MULTRET))  /* Lua function? */
       luaV_execute(L);  /* call it */
   }
-  else if (L->status != LUA_YIELD)
-    resume_error(L, "cannot resume dead coroutine", firstArg);
   else {  /* resuming from previous yield */
+    lua_assert(L->status == LUA_YIELD);
     L->status = LUA_OK;  /* mark that it is running (again) */
     ci->func = restorestack(L, ci->extra);
     if (isLua(ci))  /* yielded inside a hook? */
@@ -647,7 +642,6 @@
     }
     unroll(L, NULL);  /* run continuation */
   }
-  lua_assert(nCcalls == L->nCcalls);
 }
 
 
@@ -655,8 +649,16 @@
   int status;
   unsigned short oldnny = L->nny;  /* save "number of non-yieldable" calls */
   lua_lock(L);
-  luai_userstateresume(L, nargs);
+  if (L->status == LUA_OK) {  /* may be starting a coroutine */
+    if (L->ci != &L->base_ci)  /* not in base level? */
+      return resume_error(L, "cannot resume non-suspended coroutine", nargs);
+  }
+  else if (L->status != LUA_YIELD)
+    return resume_error(L, "cannot resume dead coroutine", nargs);
   L->nCcalls = (from) ? from->nCcalls + 1 : 1;
+  if (L->nCcalls >= LUAI_MAXCCALLS)
+    return resume_error(L, "C stack overflow", nargs);
+  luai_userstateresume(L, nargs);
   L->nny = 0;  /* allow yields */
   api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
   status = luaD_rawrunprotected(L, resume, &nargs);
diff -u -r lua-5.3.3/src/lgc.c lua-5.3.4/src/lgc.c
--- lua-5.3.3/src/lgc.c	2016-03-31 16:02:03.000000000 -0300
+++ lua-5.3.4/src/lgc.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 2.212 2016/03/31 19:02:03 roberto Exp $
+** $Id: lgc.c,v 2.215 2016/12/22 13:08:50 roberto Exp $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -467,7 +467,7 @@
   else  /* not weak */
     traversestrongtable(g, h);
   return sizeof(Table) + sizeof(TValue) * h->sizearray +
-                         sizeof(Node) * cast(size_t, sizenode(h));
+                         sizeof(Node) * cast(size_t, allocsizenode(h));
 }
 
 
@@ -539,7 +539,7 @@
     StkId lim = th->stack + th->stacksize;  /* real end of stack */
     for (; o < lim; o++)  /* clear not-marked stack slice */
       setnilvalue(o);
-    /* 'remarkupvals' may have removed thread from 'twups' list */ 
+    /* 'remarkupvals' may have removed thread from 'twups' list */
     if (!isintwups(th) && th->openupval != NULL) {
       th->twups = g->twups;  /* link it back to the list */
       g->twups = th;
@@ -818,7 +818,9 @@
     setobj2s(L, L->top, tm);  /* push finalizer... */
     setobj2s(L, L->top + 1, &v);  /* ... and its argument */
     L->top += 2;  /* and (next line) call the finalizer */
+    L->ci->callstatus |= CIST_FIN;  /* will run a finalizer */
     status = luaD_pcall(L, dothecall, NULL, savestack(L, L->top - 2), 0);
+    L->ci->callstatus &= ~CIST_FIN;  /* not running a finalizer anymore */
     L->allowhook = oldah;  /* restore hooks */
     g->gcrunning = running;  /* restore state */
     if (status != LUA_OK && propagateerrors) {  /* error while running __gc? */
diff -u -r lua-5.3.3/src/linit.c lua-5.3.4/src/linit.c
--- lua-5.3.3/src/linit.c	2015-01-05 11:48:33.000000000 -0200
+++ lua-5.3.4/src/linit.c	2016-12-04 18:17:24.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: linit.c,v 1.38 2015/01/05 13:48:33 roberto Exp $
+** $Id: linit.c,v 1.39 2016/12/04 20:17:24 roberto Exp $
 ** Initialization of libraries for lua.c and other clients
 ** See Copyright Notice in lua.h
 */
@@ -18,10 +18,10 @@
 ** open the library, which is already linked to the application.
 ** For that, do the following code:
 **
-**  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
+**  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
 **  lua_pushcfunction(L, luaopen_modname);
 **  lua_setfield(L, -2, modname);
-**  lua_pop(L, 1);  // remove _PRELOAD table
+**  lua_pop(L, 1);  // remove PRELOAD table
 */
 
 #include "lprefix.h"
diff -u -r lua-5.3.3/src/liolib.c lua-5.3.4/src/liolib.c
--- lua-5.3.3/src/liolib.c	2016-05-02 11:03:19.000000000 -0300
+++ lua-5.3.4/src/liolib.c	2016-12-20 16:37:00.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.149 2016/05/02 14:03:19 roberto Exp $
+** $Id: liolib.c,v 2.151 2016/12/20 18:37:00 roberto Exp $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -37,10 +37,11 @@
 #endif
 
 /* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
-#define l_checkmode(mode) \
-	(*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&	\
-	(*mode != '+' || (++mode, 1)) &&  /* skip if char is '+' */	\
-	(strspn(mode, L_MODEEXT) == strlen(mode)))
+static int l_checkmode (const char *mode) {
+  return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&
+         (*mode != '+' || (++mode, 1)) &&  /* skip if char is '+' */
+         (strspn(mode, L_MODEEXT) == strlen(mode)));  /* check extensions */
+}
 
 #endif
 
@@ -618,8 +619,10 @@
     if (lua_type(L, arg) == LUA_TNUMBER) {
       /* optimization: could be done exactly as for strings */
       int len = lua_isinteger(L, arg)
-                ? fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg))
-                : fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg));
+                ? fprintf(f, LUA_INTEGER_FMT,
+                             (LUAI_UACINT)lua_tointeger(L, arg))
+                : fprintf(f, LUA_NUMBER_FMT,
+                             (LUAI_UACNUMBER)lua_tonumber(L, arg));
       status = status && (len > 0);
     }
     else {
diff -u -r lua-5.3.3/src/lmathlib.c lua-5.3.4/src/lmathlib.c
--- lua-5.3.3/src/lmathlib.c	2015-10-02 12:39:23.000000000 -0300
+++ lua-5.3.4/src/lmathlib.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.117 2015/10/02 15:39:23 roberto Exp $
+** $Id: lmathlib.c,v 1.119 2016/12/22 13:08:50 roberto Exp $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -184,10 +184,13 @@
   else {
     lua_Number base = luaL_checknumber(L, 2);
 #if !defined(LUA_USE_C89)
-    if (base == 2.0) res = l_mathop(log2)(x); else
+    if (base == l_mathop(2.0))
+      res = l_mathop(log2)(x); else
 #endif
-    if (base == 10.0) res = l_mathop(log10)(x);
-    else res = l_mathop(log)(x)/l_mathop(log)(base);
+    if (base == l_mathop(10.0))
+      res = l_mathop(log10)(x);
+    else
+      res = l_mathop(log)(x)/l_mathop(log)(base);
   }
   lua_pushnumber(L, res);
   return 1;
@@ -262,7 +265,7 @@
     default: return luaL_error(L, "wrong number of arguments");
   }
   /* random integer in the interval [low, up] */
-  luaL_argcheck(L, low <= up, 1, "interval is empty"); 
+  luaL_argcheck(L, low <= up, 1, "interval is empty");
   luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
                    "interval too large");
   r *= (double)(up - low) + 1.0;
@@ -281,9 +284,9 @@
 static int math_type (lua_State *L) {
   if (lua_type(L, 1) == LUA_TNUMBER) {
       if (lua_isinteger(L, 1))
-        lua_pushliteral(L, "integer"); 
+        lua_pushliteral(L, "integer");
       else
-        lua_pushliteral(L, "float"); 
+        lua_pushliteral(L, "float");
   }
   else {
     luaL_checkany(L, 1);
diff -u -r lua-5.3.3/src/loadlib.c lua-5.3.4/src/loadlib.c
--- lua-5.3.3/src/loadlib.c	2015-11-23 09:30:45.000000000 -0200
+++ lua-5.3.4/src/loadlib.c	2017-01-12 15:14:26.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.127 2015/11/23 11:30:45 roberto Exp $
+** $Id: loadlib.c,v 1.130 2017/01/12 17:14:26 roberto Exp $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -25,40 +25,9 @@
 
 
 /*
-** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
-** variables that Lua check to set its paths.
-*/
-#if !defined(LUA_PATH_VAR)
-#define LUA_PATH_VAR	"LUA_PATH"
-#endif
-
-#if !defined(LUA_CPATH_VAR)
-#define LUA_CPATH_VAR	"LUA_CPATH"
-#endif
-
-#define LUA_PATHSUFFIX		"_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
-
-#define LUA_PATHVARVERSION		LUA_PATH_VAR LUA_PATHSUFFIX
-#define LUA_CPATHVARVERSION		LUA_CPATH_VAR LUA_PATHSUFFIX
-
-/*
-** LUA_PATH_SEP is the character that separates templates in a path.
-** LUA_PATH_MARK is the string that marks the substitution points in a
-** template.
-** LUA_EXEC_DIR in a Windows path is replaced by the executable's
-** directory.
 ** LUA_IGMARK is a mark to ignore all before it when building the
 ** luaopen_ function name.
 */
-#if !defined (LUA_PATH_SEP)
-#define LUA_PATH_SEP		";"
-#endif
-#if !defined (LUA_PATH_MARK)
-#define LUA_PATH_MARK		"?"
-#endif
-#if !defined (LUA_EXEC_DIR)
-#define LUA_EXEC_DIR		"!"
-#endif
 #if !defined (LUA_IGMARK)
 #define LUA_IGMARK		"-"
 #endif
@@ -94,7 +63,8 @@
 
 #define LIB_FAIL	"open"
 
-#define setprogdir(L)		((void)0)
+
+#define setprogdir(L)           ((void)0)
 
 
 /*
@@ -179,7 +149,6 @@
 
 #include 
 
-#undef setprogdir
 
 /*
 ** optional flags for LoadLibraryEx
@@ -189,21 +158,30 @@
 #endif
 
 
+#undef setprogdir
+
+
+/*
+** Replace in the path (on the top of the stack) any occurrence
+** of LUA_EXEC_DIR with the executable's path.
+*/
 static void setprogdir (lua_State *L) {
   char buff[MAX_PATH + 1];
   char *lb;
   DWORD nsize = sizeof(buff)/sizeof(char);
-  DWORD n = GetModuleFileNameA(NULL, buff, nsize);
+  DWORD n = GetModuleFileNameA(NULL, buff, nsize);  /* get exec. name */
   if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
     luaL_error(L, "unable to get ModuleFileName");
   else {
-    *lb = '\0';
+    *lb = '\0';  /* cut name on the last '\\' to get the path */
     luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff);
     lua_remove(L, -2);  /* remove original string */
   }
 }
 
 
+
+
 static void pusherror (lua_State *L) {
   int error = GetLastError();
   char buffer[128];
@@ -273,6 +251,67 @@
 
 
 /*
+** {==================================================================
+** Set Paths
+** ===================================================================
+*/
+
+/*
+** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
+** variables that Lua check to set its paths.
+*/
+#if !defined(LUA_PATH_VAR)
+#define LUA_PATH_VAR    "LUA_PATH"
+#endif
+
+#if !defined(LUA_CPATH_VAR)
+#define LUA_CPATH_VAR   "LUA_CPATH"
+#endif
+
+
+#define AUXMARK         "\1"	/* auxiliary mark */
+
+
+/*
+** return registry.LUA_NOENV as a boolean
+*/
+static int noenv (lua_State *L) {
+  int b;
+  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
+  b = lua_toboolean(L, -1);
+  lua_pop(L, 1);  /* remove value */
+  return b;
+}
+
+
+/*
+** Set a path
+*/
+static void setpath (lua_State *L, const char *fieldname,
+                                   const char *envname,
+                                   const char *dft) {
+  const char *nver = lua_pushfstring(L, "%s%s", envname, LUA_VERSUFFIX);
+  const char *path = getenv(nver);  /* use versioned name */
+  if (path == NULL)  /* no environment variable? */
+    path = getenv(envname);  /* try unversioned name */
+  if (path == NULL || noenv(L))  /* no environment variable? */
+    lua_pushstring(L, dft);  /* use default */
+  else {
+    /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
+    path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP,
+                              LUA_PATH_SEP AUXMARK LUA_PATH_SEP);
+    luaL_gsub(L, path, AUXMARK, dft);
+    lua_remove(L, -2); /* remove result from 1st 'gsub' */
+  }
+  setprogdir(L);
+  lua_setfield(L, -3, fieldname);  /* package[fieldname] = path value */
+  lua_pop(L, 1);  /* pop versioned variable name */
+}
+
+/* }================================================================== */
+
+
+/*
 ** return registry.CLIBS[path]
 */
 static void *checkclib (lua_State *L, const char *path) {
@@ -520,7 +559,7 @@
 
 static int searcher_preload (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
-  lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
   if (lua_getfield(L, -1, name) == LUA_TNIL)  /* not found? */
     lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
   return 1;
@@ -557,9 +596,9 @@
 
 static int ll_require (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
-  lua_settop(L, 1);  /* _LOADED table will be at index 2 */
-  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, 2, name);  /* _LOADED[name] */
+  lua_settop(L, 1);  /* LOADED table will be at index 2 */
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
+  lua_getfield(L, 2, name);  /* LOADED[name] */
   if (lua_toboolean(L, -1))  /* is it there? */
     return 1;  /* package is already loaded */
   /* else must load package */
@@ -569,11 +608,11 @@
   lua_insert(L, -2);  /* name is 1st argument (before search data) */
   lua_call(L, 2, 1);  /* run loader to load module */
   if (!lua_isnil(L, -1))  /* non-nil return? */
-    lua_setfield(L, 2, name);  /* _LOADED[name] = returned value */
+    lua_setfield(L, 2, name);  /* LOADED[name] = returned value */
   if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
     lua_pushboolean(L, 1);  /* use true as result */
     lua_pushvalue(L, -1);  /* extra copy to be returned */
-    lua_setfield(L, 2, name);  /* _LOADED[name] = true */
+    lua_setfield(L, 2, name);  /* LOADED[name] = true */
   }
   return 1;
 }
@@ -666,41 +705,6 @@
 
 
 
-/* auxiliary mark (for internal use) */
-#define AUXMARK		"\1"
-
-
-/*
-** return registry.LUA_NOENV as a boolean
-*/
-static int noenv (lua_State *L) {
-  int b;
-  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
-  b = lua_toboolean(L, -1);
-  lua_pop(L, 1);  /* remove value */
-  return b;
-}
-
-
-static void setpath (lua_State *L, const char *fieldname, const char *envname1,
-                                   const char *envname2, const char *def) {
-  const char *path = getenv(envname1);
-  if (path == NULL)  /* no environment variable? */
-    path = getenv(envname2);  /* try alternative name */
-  if (path == NULL || noenv(L))  /* no environment variable? */
-    lua_pushstring(L, def);  /* use default */
-  else {
-    /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
-    path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP,
-                              LUA_PATH_SEP AUXMARK LUA_PATH_SEP);
-    luaL_gsub(L, path, AUXMARK, def);
-    lua_remove(L, -2);
-  }
-  setprogdir(L);
-  lua_setfield(L, -2, fieldname);
-}
-
-
 static const luaL_Reg pk_funcs[] = {
   {"loadlib", ll_loadlib},
   {"searchpath", ll_searchpath},
@@ -764,19 +768,18 @@
   createclibstable(L);
   luaL_newlib(L, pk_funcs);  /* create 'package' table */
   createsearcherstable(L);
-  /* set field 'path' */
-  setpath(L, "path", LUA_PATHVARVERSION, LUA_PATH_VAR, LUA_PATH_DEFAULT);
-  /* set field 'cpath' */
-  setpath(L, "cpath", LUA_CPATHVARVERSION, LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
+  /* set paths */
+  setpath(L, "path", LUA_PATH_VAR, LUA_PATH_DEFAULT);
+  setpath(L, "cpath", LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
   /* store config information */
   lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
                      LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
   lua_setfield(L, -2, "config");
   /* set field 'loaded' */
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
   lua_setfield(L, -2, "loaded");
   /* set field 'preload' */
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
   lua_setfield(L, -2, "preload");
   lua_pushglobaltable(L);
   lua_pushvalue(L, -2);  /* set 'package' as upvalue for next lib */
diff -u -r lua-5.3.3/src/lobject.c lua-5.3.4/src/lobject.c
--- lua-5.3.3/src/lobject.c	2016-05-20 11:07:48.000000000 -0300
+++ lua-5.3.4/src/lobject.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 2.111 2016/05/20 14:07:48 roberto Exp $
+** $Id: lobject.c,v 2.113 2016/12/22 13:08:50 roberto Exp $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -280,7 +280,7 @@
   endptr = l_str2dloc(s, result, mode);  /* try to convert */
   if (endptr == NULL) {  /* failed? may be a different locale */
     char buff[L_MAXLENNUM + 1];
-    char *pdot = strchr(s, '.');
+    const char *pdot = strchr(s, '.');
     if (strlen(s) > L_MAXLENNUM || pdot == NULL)
       return NULL;  /* string too long or no dot; fail */
     strcpy(buff, s);  /* copy string to buffer */
@@ -394,7 +394,7 @@
 
 
 /*
-** this function handles only '%d', '%c', '%f', '%p', and '%s' 
+** this function handles only '%d', '%c', '%f', '%p', and '%s'
    conventional formats, plus Lua-specific '%I' and '%U'
 */
 const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
diff -u -r lua-5.3.3/src/lobject.h lua-5.3.4/src/lobject.h
--- lua-5.3.3/src/lobject.h	2015-11-03 16:33:10.000000000 -0200
+++ lua-5.3.4/src/lobject.h	2016-08-01 16:51:24.000000000 -0300
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 2.116 2015/11/03 18:33:10 roberto Exp $
+** $Id: lobject.h,v 2.117 2016/08/01 19:51:24 roberto Exp $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -407,7 +407,7 @@
 typedef struct Proto {
   CommonHeader;
   lu_byte numparams;  /* number of fixed parameters */
-  lu_byte is_vararg;  /* 2: declared vararg; 1: uses vararg */
+  lu_byte is_vararg;
   lu_byte maxstacksize;  /* number of registers needed by this function */
   int sizeupvalues;  /* size of 'upvalues' */
   int sizek;  /* size of 'k' */
diff -u -r lua-5.3.3/src/lopcodes.h lua-5.3.4/src/lopcodes.h
--- lua-5.3.3/src/lopcodes.h	2014-10-25 09:50:46.000000000 -0200
+++ lua-5.3.4/src/lopcodes.h	2016-07-19 14:12:21.000000000 -0300
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.148 2014/10/25 11:50:46 roberto Exp $
+** $Id: lopcodes.h,v 1.149 2016/07/19 17:12:21 roberto Exp $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -139,7 +139,9 @@
 /* gets the index of the constant */
 #define INDEXK(r)	((int)(r) & ~BITRK)
 
+#if !defined(MAXINDEXRK)  /* (for debugging only) */
 #define MAXINDEXRK	(BITRK - 1)
+#endif
 
 /* code a constant index as a RK value */
 #define RKASK(x)	((x) | BITRK)
diff -u -r lua-5.3.3/src/loslib.c lua-5.3.4/src/loslib.c
--- lua-5.3.3/src/loslib.c	2016-04-18 10:06:55.000000000 -0300
+++ lua-5.3.4/src/loslib.c	2016-07-18 14:58:58.000000000 -0300
@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c,v 1.64 2016/04/18 13:06:55 roberto Exp $
+** $Id: loslib.c,v 1.65 2016/07/18 17:58:58 roberto Exp $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -30,16 +30,16 @@
 */
 #if !defined(LUA_STRFTIMEOPTIONS)	/* { */
 
-/* options for ANSI C 89 */
+/* options for ANSI C 89 (only 1-char options) */
 #define L_STRFTIMEC89		"aAbBcdHIjmMpSUwWxXyYZ%"
 
 /* options for ISO C 99 and POSIX */
 #define L_STRFTIMEC99 "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
-	"||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"
+    "||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy"  /* two-char options */
 
 /* options for Windows */
 #define L_STRFTIMEWIN "aAbBcdHIjmMpSUwWxXyYzZ%" \
-	"||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"
+    "||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y"  /* two-char options */
 
 #if defined(LUA_USE_WINDOWS)
 #define LUA_STRFTIMEOPTIONS	L_STRFTIMEWIN
@@ -257,12 +257,13 @@
 }
 
 
-static const char *checkoption (lua_State *L, const char *conv, char *buff) {
-  const char *option;
-  int oplen = 1;
-  for (option = LUA_STRFTIMEOPTIONS; *option != '\0'; option += oplen) {
+static const char *checkoption (lua_State *L, const char *conv,
+                                ptrdiff_t convlen, char *buff) {
+  const char *option = LUA_STRFTIMEOPTIONS;
+  int oplen = 1;  /* length of options being checked */
+  for (; *option != '\0' && oplen <= convlen; option += oplen) {
     if (*option == '|')  /* next block? */
-      oplen++;  /* next length */
+      oplen++;  /* will check options with next length (+1) */
     else if (memcmp(conv, option, oplen) == 0) {  /* match? */
       memcpy(buff, conv, oplen);  /* copy valid option to buffer */
       buff[oplen] = '\0';
@@ -280,8 +281,10 @@
 
 
 static int os_date (lua_State *L) {
-  const char *s = luaL_optstring(L, 1, "%c");
+  size_t slen;
+  const char *s = luaL_optlstring(L, 1, "%c", &slen);
   time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
+  const char *se = s + slen;  /* 's' end */
   struct tm tmr, *stm;
   if (*s == '!') {  /* UTC? */
     stm = l_gmtime(&t, &tmr);
@@ -300,13 +303,14 @@
     luaL_Buffer b;
     cc[0] = '%';
     luaL_buffinit(L, &b);
-    while (*s) {
+    while (s < se) {
       if (*s != '%')  /* not a conversion specifier? */
         luaL_addchar(&b, *s++);
       else {
         size_t reslen;
         char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
-        s = checkoption(L, s + 1, cc + 1);  /* copy specifier to 'cc' */
+        s++;  /* skip '%' */
+        s = checkoption(L, s, se - s, cc + 1);  /* copy specifier to 'cc' */
         reslen = strftime(buff, SIZETIMEFMT, cc, stm);
         luaL_addsize(&b, reslen);
       }
diff -u -r lua-5.3.3/src/lparser.c lua-5.3.4/src/lparser.c
--- lua-5.3.3/src/lparser.c	2016-05-13 16:10:16.000000000 -0300
+++ lua-5.3.4/src/lparser.c	2016-08-01 16:51:24.000000000 -0300
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.153 2016/05/13 19:10:16 roberto Exp $
+** $Id: lparser.c,v 2.155 2016/08/01 19:51:24 roberto Exp $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -323,6 +323,8 @@
       luaK_nil(fs, reg, extra);
     }
   }
+  if (nexps > nvars)
+    ls->fs->freereg -= nexps - nvars;  /* remove extra values */
 }
 
 
@@ -764,7 +766,7 @@
         }
         case TK_DOTS: {  /* param -> '...' */
           luaX_next(ls);
-          f->is_vararg = 2;  /* declared vararg */
+          f->is_vararg = 1;  /* declared vararg */
           break;
         }
         default: luaX_syntaxerror(ls, " or '...' expected");
@@ -960,7 +962,6 @@
       FuncState *fs = ls->fs;
       check_condition(ls, fs->f->is_vararg,
                       "cannot use '...' outside a vararg function");
-      fs->f->is_vararg = 1;  /* function actually uses vararg */
       init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0));
       break;
     }
@@ -1160,11 +1161,8 @@
     int nexps;
     checknext(ls, '=');
     nexps = explist(ls, &e);
-    if (nexps != nvars) {
+    if (nexps != nvars)
       adjust_assign(ls, nvars, nexps, &e);
-      if (nexps > nvars)
-        ls->fs->freereg -= nexps - nvars;  /* remove extra values */
-    }
     else {
       luaK_setoneret(ls->fs, &e);  /* close last expression */
       luaK_storevar(ls->fs, &lh->v, &e);
@@ -1615,7 +1613,7 @@
   BlockCnt bl;
   expdesc v;
   open_func(ls, fs, &bl);
-  fs->f->is_vararg = 2;  /* main function is always declared vararg */
+  fs->f->is_vararg = 1;  /* main function is always declared vararg */
   init_exp(&v, VLOCAL, 0);  /* create and... */
   newupvalue(fs, ls->envn, &v);  /* ...set environment upvalue */
   luaX_next(ls);  /* read first token */
diff -u -r lua-5.3.3/src/lstate.h lua-5.3.4/src/lstate.h
--- lua-5.3.3/src/lstate.h	2015-12-16 14:39:38.000000000 -0200
+++ lua-5.3.4/src/lstate.h	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.130 2015/12/16 16:39:38 roberto Exp $
+** $Id: lstate.h,v 2.133 2016/12/22 13:08:50 roberto Exp $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -23,7 +23,7 @@
 **
 ** 'allgc': all objects not marked for finalization;
 ** 'finobj': all objects marked for finalization;
-** 'tobefnz': all objects ready to be finalized; 
+** 'tobefnz': all objects ready to be finalized;
 ** 'fixedgc': all objects that are not to be collected (currently
 ** only small strings, such as reserved words).
 
@@ -34,7 +34,7 @@
 
 
 /*
-** Atomic type (relative to signals) to better ensure that 'lua_sethook' 
+** Atomic type (relative to signals) to better ensure that 'lua_sethook'
 ** is thread safe
 */
 #if !defined(l_signalT)
@@ -66,7 +66,7 @@
 ** Information about a call.
 ** When a thread yields, 'func' is adjusted to pretend that the
 ** top function has only the yielded values in its stack; in that
-** case, the actual 'func' value is saved in field 'extra'. 
+** case, the actual 'func' value is saved in field 'extra'.
 ** When a function calls another with a continuation, 'extra' keeps
 ** the function index so that, in case of errors, the continuation
 ** function can be called with the correct top.
@@ -88,7 +88,7 @@
   } u;
   ptrdiff_t extra;
   short nresults;  /* expected number of results from this function */
-  lu_byte callstatus;
+  unsigned short callstatus;
 } CallInfo;
 
 
@@ -104,6 +104,7 @@
 #define CIST_TAIL	(1<<5)	/* call was tail called */
 #define CIST_HOOKYIELD	(1<<6)	/* last hook called yielded */
 #define CIST_LEQ	(1<<7)  /* using __lt for __le */
+#define CIST_FIN	(1<<8)  /* call is running a finalizer */
 
 #define isLua(ci)	((ci)->callstatus & CIST_LUA)
 
diff -u -r lua-5.3.3/src/lstrlib.c lua-5.3.4/src/lstrlib.c
--- lua-5.3.3/src/lstrlib.c	2016-05-20 11:13:21.000000000 -0300
+++ lua-5.3.4/src/lstrlib.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c,v 1.251 2016/05/20 14:13:21 roberto Exp $
+** $Id: lstrlib.c,v 1.254 2016/12/22 13:08:50 roberto Exp $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -839,11 +839,12 @@
 
 
 static int num2straux (char *buff, int sz, lua_Number x) {
-  if (x != x || x == HUGE_VAL || x == -HUGE_VAL)  /* inf or NaN? */
-    return l_sprintf(buff, sz, LUA_NUMBER_FMT, x);  /* equal to '%g' */
+  /* if 'inf' or 'NaN', format it like '%g' */
+  if (x != x || x == (lua_Number)HUGE_VAL || x == -(lua_Number)HUGE_VAL)
+    return l_sprintf(buff, sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)x);
   else if (x == 0) {  /* can be -0... */
     /* create "0" or "-0" followed by exponent */
-    return l_sprintf(buff, sz, LUA_NUMBER_FMT "x0p+0", x);
+    return l_sprintf(buff, sz, LUA_NUMBER_FMT "x0p+0", (LUAI_UACNUMBER)x);
   }
   else {
     int e;
@@ -933,7 +934,7 @@
 static void checkdp (char *buff, int nb) {
   if (memchr(buff, '.', nb) == NULL) {  /* no dot? */
     char point = lua_getlocaledecpoint();  /* try locale point */
-    char *ppoint = memchr(buff, point, nb);
+    char *ppoint = (char *)memchr(buff, point, nb);
     if (ppoint) *ppoint = '.';  /* change it to a dot */
   }
 }
@@ -960,7 +961,7 @@
         const char *format = (n == LUA_MININTEGER)  /* corner case? */
                            ? "0x%" LUA_INTEGER_FRMLEN "x"  /* use hexa */
                            : LUA_INTEGER_FMT;  /* else use default format */
-        nb = l_sprintf(buff, MAX_ITEM, format, n);
+        nb = l_sprintf(buff, MAX_ITEM, format, (LUAI_UACINT)n);
       }
       luaL_addsize(b, nb);
       break;
@@ -1041,7 +1042,7 @@
         case 'o': case 'u': case 'x': case 'X': {
           lua_Integer n = luaL_checkinteger(L, arg);
           addlenmod(form, LUA_INTEGER_FRMLEN);
-          nb = l_sprintf(buff, MAX_ITEM, form, n);
+          nb = l_sprintf(buff, MAX_ITEM, form, (LUAI_UACINT)n);
           break;
         }
         case 'a': case 'A':
@@ -1051,8 +1052,9 @@
           break;
         case 'e': case 'E': case 'f':
         case 'g': case 'G': {
+          lua_Number n = luaL_checknumber(L, arg);
           addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = l_sprintf(buff, MAX_ITEM, form, luaL_checknumber(L, arg));
+          nb = l_sprintf(buff, MAX_ITEM, form, (LUAI_UACNUMBER)n);
           break;
         }
         case 'q': {
@@ -1259,7 +1261,7 @@
 ** 'psize' is filled with option's size, 'notoalign' with its
 ** alignment requirements.
 ** Local variable 'size' gets the size to be aligned. (Kpadal option
-** always gets its full alignment, other options are limited by 
+** always gets its full alignment, other options are limited by
 ** the maximum alignment ('maxalign'). Kchar option needs no alignment
 ** despite its size.
 */
diff -u -r lua-5.3.3/src/ltable.c lua-5.3.4/src/ltable.c
--- lua-5.3.3/src/ltable.c	2015-11-19 17:16:22.000000000 -0200
+++ lua-5.3.4/src/ltable.c	2016-11-07 10:38:35.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 2.117 2015/11/19 19:16:22 roberto Exp $
+** $Id: ltable.c,v 2.118 2016/11/07 12:38:35 roberto Exp $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -74,8 +74,6 @@
 
 #define dummynode		(&dummynode_)
 
-#define isdummy(n)		((n) == dummynode)
-
 static const Node dummynode_ = {
   {NILCONSTANT},  /* value */
   {{NILCONSTANT, 0}}  /* key */
@@ -308,14 +306,14 @@
 
 
 static void setnodevector (lua_State *L, Table *t, unsigned int size) {
-  int lsize;
   if (size == 0) {  /* no elements to hash part? */
     t->node = cast(Node *, dummynode);  /* use common 'dummynode' */
-    lsize = 0;
+    t->lsizenode = 0;
+    t->lastfree = NULL;  /* signal that it is using dummy node */
   }
   else {
     int i;
-    lsize = luaO_ceillog2(size);
+    int lsize = luaO_ceillog2(size);
     if (lsize > MAXHBITS)
       luaG_runerror(L, "table overflow");
     size = twoto(lsize);
@@ -326,9 +324,9 @@
       setnilvalue(wgkey(n));
       setnilvalue(gval(n));
     }
+    t->lsizenode = cast_byte(lsize);
+    t->lastfree = gnode(t, size);  /* all positions are free */
   }
-  t->lsizenode = cast_byte(lsize);
-  t->lastfree = gnode(t, size);  /* all positions are free */
 }
 
 
@@ -337,7 +335,7 @@
   unsigned int i;
   int j;
   unsigned int oldasize = t->sizearray;
-  int oldhsize = t->lsizenode;
+  int oldhsize = allocsizenode(t);
   Node *nold = t->node;  /* save old hash ... */
   if (nasize > oldasize)  /* array part must grow? */
     setarrayvector(L, t, nasize);
@@ -354,7 +352,7 @@
     luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
   }
   /* re-insert elements from hash part */
-  for (j = twoto(oldhsize) - 1; j >= 0; j--) {
+  for (j = oldhsize - 1; j >= 0; j--) {
     Node *old = nold + j;
     if (!ttisnil(gval(old))) {
       /* doesn't need barrier/invalidate cache, as entry was
@@ -362,13 +360,13 @@
       setobjt2t(L, luaH_set(L, t, gkey(old)), gval(old));
     }
   }
-  if (!isdummy(nold))
-    luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old hash */
+  if (oldhsize > 0)  /* not the dummy node? */
+    luaM_freearray(L, nold, cast(size_t, oldhsize)); /* free old hash */
 }
 
 
 void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
-  int nsize = isdummy(t->node) ? 0 : sizenode(t);
+  int nsize = allocsizenode(t);
   luaH_resize(L, t, nasize, nsize);
 }
 
@@ -414,7 +412,7 @@
 
 
 void luaH_free (lua_State *L, Table *t) {
-  if (!isdummy(t->node))
+  if (!isdummy(t))
     luaM_freearray(L, t->node, cast(size_t, sizenode(t)));
   luaM_freearray(L, t->array, t->sizearray);
   luaM_free(L, t);
@@ -422,10 +420,12 @@
 
 
 static Node *getfreepos (Table *t) {
-  while (t->lastfree > t->node) {
-    t->lastfree--;
-    if (ttisnil(gkey(t->lastfree)))
-      return t->lastfree;
+  if (!isdummy(t)) {
+    while (t->lastfree > t->node) {
+      t->lastfree--;
+      if (ttisnil(gkey(t->lastfree)))
+        return t->lastfree;
+    }
   }
   return NULL;  /* could not find a free place */
 }
@@ -445,7 +445,7 @@
   if (ttisnil(key)) luaG_runerror(L, "table index is nil");
   else if (ttisfloat(key)) {
     lua_Integer k;
-    if (luaV_tointeger(key, &k, 0)) {  /* index is int? */
+    if (luaV_tointeger(key, &k, 0)) {  /* does index fit in an integer? */
       setivalue(&aux, k);
       key = &aux;  /* insert it as an integer */
     }
@@ -453,7 +453,7 @@
       luaG_runerror(L, "table index is NaN");
   }
   mp = mainposition(t, key);
-  if (!ttisnil(gval(mp)) || isdummy(mp)) {  /* main position is taken? */
+  if (!ttisnil(gval(mp)) || isdummy(t)) {  /* main position is taken? */
     Node *othern;
     Node *f = getfreepos(t);  /* get a free place */
     if (f == NULL) {  /* cannot find a free place? */
@@ -461,7 +461,7 @@
       /* whatever called 'newkey' takes care of TM cache */
       return luaH_set(L, t, key);  /* insert key into grown table */
     }
-    lua_assert(!isdummy(f));
+    lua_assert(!isdummy(t));
     othern = mainposition(t, gkey(mp));
     if (othern != mp) {  /* is colliding node out of its main position? */
       /* yes; move colliding node into free position */
@@ -651,7 +651,7 @@
     return i;
   }
   /* else must find a boundary in hash part */
-  else if (isdummy(t->node))  /* hash part is empty? */
+  else if (isdummy(t))  /* hash part is empty? */
     return j;  /* that is easy... */
   else return unbound_search(t, j);
 }
@@ -664,6 +664,6 @@
   return mainposition(t, key);
 }
 
-int luaH_isdummy (Node *n) { return isdummy(n); }
+int luaH_isdummy (const Table *t) { return isdummy(t); }
 
 #endif
diff -u -r lua-5.3.3/src/ltable.h lua-5.3.4/src/ltable.h
--- lua-5.3.3/src/ltable.h	2015-11-03 13:47:30.000000000 -0200
+++ lua-5.3.4/src/ltable.h	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h,v 2.21 2015/11/03 15:47:30 roberto Exp $
+** $Id: ltable.h,v 2.23 2016/12/22 13:08:50 roberto Exp $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -15,7 +15,7 @@
 #define gnext(n)	((n)->i_key.nk.next)
 
 
-/* 'const' to avoid wrong writings that can mess up field 'next' */ 
+/* 'const' to avoid wrong writings that can mess up field 'next' */
 #define gkey(n)		cast(const TValue*, (&(n)->i_key.tvk))
 
 /*
@@ -27,6 +27,14 @@
 #define invalidateTMcache(t)	((t)->flags = 0)
 
 
+/* true when 't' is using 'dummynode' as its hash part */
+#define isdummy(t)		((t)->lastfree == NULL)
+
+
+/* allocated size for hash nodes */
+#define allocsizenode(t)	(isdummy(t) ? 0 : sizenode(t))
+
+
 /* returns the key, given the value of a table entry */
 #define keyfromval(v) \
   (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
@@ -51,7 +59,7 @@
 
 #if defined(LUA_DEBUG)
 LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
-LUAI_FUNC int luaH_isdummy (Node *n);
+LUAI_FUNC int luaH_isdummy (const Table *t);
 #endif
 
 
diff -u -r lua-5.3.3/src/ltm.c lua-5.3.4/src/ltm.c
--- lua-5.3.3/src/ltm.c	2016-02-26 16:20:15.000000000 -0300
+++ lua-5.3.4/src/ltm.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 2.37 2016/02/26 19:20:15 roberto Exp $
+** $Id: ltm.c,v 2.38 2016/12/22 13:08:50 roberto Exp $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -15,7 +15,7 @@
 #include "lua.h"
 
 #include "ldebug.h"
-#include "ldo.h" 
+#include "ldo.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
diff -u -r lua-5.3.3/src/lua.c lua-5.3.4/src/lua.c
--- lua-5.3.3/src/lua.c	2015-08-14 16:11:20.000000000 -0300
+++ lua-5.3.4/src/lua.c	2017-01-12 15:14:26.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.226 2015/08/14 19:11:20 roberto Exp $
+** $Id: lua.c,v 1.230 2017/01/12 17:14:26 roberto Exp $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -20,6 +20,7 @@
 #include "lualib.h"
 
 
+
 #if !defined(LUA_PROMPT)
 #define LUA_PROMPT		"> "
 #define LUA_PROMPT2		">> "
@@ -37,8 +38,7 @@
 #define LUA_INIT_VAR		"LUA_INIT"
 #endif
 
-#define LUA_INITVARVERSION  \
-	LUA_INIT_VAR "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
+#define LUA_INITVARVERSION	LUA_INIT_VAR LUA_VERSUFFIX
 
 
 /*
@@ -55,6 +55,8 @@
 #elif defined(LUA_USE_WINDOWS)	/* }{ */
 
 #include 
+#include 
+
 #define lua_stdin_is_tty()	_isatty(_fileno(stdin))
 
 #else				/* }{ */
@@ -457,7 +459,7 @@
 /*
 ** Traverses all arguments from 'argv', returning a mask with those
 ** needed before running any Lua code (or an error code if it finds
-** any invalid argument). 'first' returns the first not-handled argument 
+** any invalid argument). 'first' returns the first not-handled argument
 ** (either the script name or a bad argument in case of error).
 */
 static int collectargs (char **argv, int *first) {
@@ -481,7 +483,7 @@
         args |= has_E;
         break;
       case 'i':
-        args |= has_i;  /* (-i implies -v) *//* FALLTHROUGH */ 
+        args |= has_i;  /* (-i implies -v) *//* FALLTHROUGH */
       case 'v':
         if (argv[i][2] != '\0')  /* extra characters after 1st? */
           return has_error;  /* invalid option */
@@ -529,6 +531,7 @@
 }
 
 
+
 static int handle_luainit (lua_State *L) {
   const char *name = "=" LUA_INITVARVERSION;
   const char *init = getenv(name + 1);
diff -u -r lua-5.3.3/src/lua.h lua-5.3.4/src/lua.h
--- lua-5.3.3/src/lua.h	2016-05-30 12:53:28.000000000 -0300
+++ lua-5.3.4/src/lua.h	2016-12-22 13:51:20.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.331 2016/05/30 15:53:28 roberto Exp $
+** $Id: lua.h,v 1.332 2016/12/22 15:51:20 roberto Exp $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -19,11 +19,11 @@
 #define LUA_VERSION_MAJOR	"5"
 #define LUA_VERSION_MINOR	"3"
 #define LUA_VERSION_NUM		503
-#define LUA_VERSION_RELEASE	"3"
+#define LUA_VERSION_RELEASE	"4"
 
 #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
-#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2016 Lua.org, PUC-Rio"
+#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2017 Lua.org, PUC-Rio"
 #define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
 
 
@@ -460,7 +460,7 @@
 
 
 /******************************************************************************
-* Copyright (C) 1994-2016 Lua.org, PUC-Rio.
+* Copyright (C) 1994-2017 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
diff -u -r lua-5.3.3/src/luaconf.h lua-5.3.4/src/luaconf.h
--- lua-5.3.3/src/luaconf.h	2016-05-01 17:06:09.000000000 -0300
+++ lua-5.3.4/src/luaconf.h	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.255 2016/05/01 20:06:09 roberto Exp $
+** $Id: luaconf.h,v 1.259 2016/12/22 13:08:50 roberto Exp $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -159,6 +159,18 @@
 */
 
 /*
+** LUA_PATH_SEP is the character that separates templates in a path.
+** LUA_PATH_MARK is the string that marks the substitution points in a
+** template.
+** LUA_EXEC_DIR in a Windows path is replaced by the executable's
+** directory.
+*/
+#define LUA_PATH_SEP            ";"
+#define LUA_PATH_MARK           "?"
+#define LUA_EXEC_DIR            "!"
+
+
+/*
 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
 ** Lua libraries.
 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
@@ -404,7 +416,7 @@
 
 /*
 @@ LUA_NUMBER is the floating-point type used by Lua.
-@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
+@@ LUAI_UACNUMBER is the result of a 'default argument promotion'
 @@ over a floating number.
 @@ l_mathlim(x) corrects limit name 'x' to the proper float type
 ** by prefixing it with one of FLT/DBL/LDBL.
@@ -421,7 +433,8 @@
 
 #define l_floor(x)		(l_mathop(floor)(x))
 
-#define lua_number2str(s,sz,n)	l_sprintf((s), sz, LUA_NUMBER_FMT, (n))
+#define lua_number2str(s,sz,n)  \
+	l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n))
 
 /*
 @@ lua_numbertointeger converts a float number to an integer, or
@@ -498,7 +511,7 @@
 **
 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
 **
-@@ LUAI_UACINT is the result of an 'usual argument conversion'
+@@ LUAI_UACINT is the result of a 'default argument promotion'
 @@ over a lUA_INTEGER.
 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
 @@ LUA_INTEGER_FMT is the format for writing integers.
@@ -511,10 +524,12 @@
 /* The following definitions are good for most cases here */
 
 #define LUA_INTEGER_FMT		"%" LUA_INTEGER_FRMLEN "d"
-#define lua_integer2str(s,sz,n)	l_sprintf((s), sz, LUA_INTEGER_FMT, (n))
 
 #define LUAI_UACINT		LUA_INTEGER
 
+#define lua_integer2str(s,sz,n)  \
+	l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n))
+
 /*
 ** use LUAI_UACINT here to avoid problems with promotions (which
 ** can turn a comparison between unsigneds into a signed comparison)
@@ -606,13 +621,14 @@
 
 
 /*
-@@ lua_number2strx converts a float to an hexadecimal numeric string. 
+@@ lua_number2strx converts a float to an hexadecimal numeric string.
 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
 ** provide its own implementation.
 */
 #if !defined(LUA_USE_C89)
-#define lua_number2strx(L,b,sz,f,n)	((void)L, l_sprintf(b,sz,f,n))
+#define lua_number2strx(L,b,sz,f,n)  \
+	((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n)))
 #endif
 
 
@@ -728,11 +744,11 @@
 /*
 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
 ** CHANGE it if it uses too much C-stack space. (For long double,
-** 'string.format("%.99f", 1e4932)' needs ~5030 bytes, so a
+** 'string.format("%.99f", -1e4932)' needs 5034 bytes, so a
 ** smaller buffer would force a memory allocation for each call to
 ** 'string.format'.)
 */
-#if defined(LUA_FLOAT_LONGDOUBLE)
+#if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE
 #define LUAL_BUFFERSIZE		8192
 #else
 #define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
diff -u -r lua-5.3.3/src/lualib.h lua-5.3.4/src/lualib.h
--- lua-5.3.3/src/lualib.h	2014-02-06 15:32:33.000000000 -0200
+++ lua-5.3.4/src/lualib.h	2017-01-12 15:14:26.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h,v 1.44 2014/02/06 17:32:33 roberto Exp $
+** $Id: lualib.h,v 1.45 2017/01/12 17:14:26 roberto Exp $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -11,6 +11,9 @@
 #include "lua.h"
 
 
+/* version suffix for environment variable names */
+#define LUA_VERSUFFIX          "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
+
 
 LUAMOD_API int (luaopen_base) (lua_State *L);
 
diff -u -r lua-5.3.3/src/lutf8lib.c lua-5.3.4/src/lutf8lib.c
--- lua-5.3.3/src/lutf8lib.c	2015-03-28 16:16:55.000000000 -0300
+++ lua-5.3.4/src/lutf8lib.c	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lutf8lib.c,v 1.15 2015/03/28 19:16:55 roberto Exp $
+** $Id: lutf8lib.c,v 1.16 2016/12/22 13:08:50 roberto Exp $
 ** Standard library for UTF-8 manipulation
 ** See Copyright Notice in lua.h
 */
@@ -194,7 +194,7 @@
     lua_pushinteger(L, posi + 1);
   else  /* no such character */
     lua_pushnil(L);
-  return 1;  
+  return 1;
 }
 
 
diff -u -r lua-5.3.3/src/lvm.h lua-5.3.4/src/lvm.h
--- lua-5.3.3/src/lvm.h	2016-01-05 14:07:21.000000000 -0200
+++ lua-5.3.4/src/lvm.h	2016-12-22 11:08:50.000000000 -0200
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 2.40 2016/01/05 16:07:21 roberto Exp $
+** $Id: lvm.h,v 2.41 2016/12/22 13:08:50 roberto Exp $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -90,7 +90,7 @@
 #define luaV_settable(L,t,k,v) { const TValue *slot; \
   if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
     luaV_finishset(L,t,k,v,slot); }
-  
+
 
 
 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);