2 files changed, 1 insertions, 9 deletions
diff --git a/src/lstrlib.js b/src/lstrlib.js
index 9bbf26a..950dca0 100644
--- a/src/lstrlib.js
+++ b/src/lstrlib.js
@@ -3,7 +3,6 @@
 const assert  = require('assert');
 const sprintf = require('sprintf-js').sprintf;
 
-const lapi    = require('./lapi.js');
 const lauxlib = require('./lauxlib.js');
 const lobject = require('./lobject.js');
 const lua     = require('./lua.js');
@@ -38,15 +37,13 @@ const posrelat = function(pos, len) {
 
 const str_sub = function(L) {
     let s = lauxlib.luaL_checkstring(L, 1);
-    let ts = L.stack[lapi.index2addr_(L, 1)];
-    s = ts.value;
     let l = s.length;
     let start = posrelat(lauxlib.luaL_checkinteger(L, 2), l);
     let end = posrelat(lauxlib.luaL_optinteger(L, 3, -1), l);
     if (start < 1) start = 1;
     if (end > l) end = l;
     if (start <= end)
-        lua.lua_pushstring(L, ts.value.slice(start - 1, (start - 1) + (end - start + 1)));
+        lua.lua_pushstring(L, s.slice(start - 1, (start - 1) + (end - start + 1)));
     else lua.lua_pushliteral(L, "");
     return 1;
 };
diff --git a/src/lutf8lib.js b/src/lutf8lib.js
index a35de63..e78b8e8 100644
--- a/src/lutf8lib.js
+++ b/src/lutf8lib.js
@@ -1,7 +1,6 @@
 "use strict";
 
 const lua     = require('./lua.js');
-const lapi    = require('./lapi.js');
 const lauxlib = require('./lauxlib.js');
 const llimit  = require('./llimit.js');
 
@@ -60,7 +59,6 @@ const utf8_decode = function(s, val) {
 const utflen = function(L) {
     let n = 0;
     let s = lauxlib.luaL_checkstring(L, 1);
-    s = L.stack[lapi.index2addr_(L, 1)].value;
     let len = s.length;
     let posi = u_posrelat(lauxlib.luaL_optinteger(L, 2, 1), len);
     let posj = u_posrelat(lauxlib.luaL_optinteger(L, 3, -1), len);
@@ -115,7 +113,6 @@ const utfchar = function(L) {
 */
 const byteoffset = function(L) {
     let s = lauxlib.luaL_checkstring(L, 1);
-    s = L.stack[lapi.index2addr_(L, 1)].value;
     let n = lauxlib.luaL_checkinteger(L, 2);
     let posi = n >= 0 ? 1 : s.length + 1;
     posi = u_posrelat(lauxlib.luaL_optinteger(L, 3, posi), s.length);
@@ -161,7 +158,6 @@ const byteoffset = function(L) {
 */
 const codepoint = function(L) {
     let s = lauxlib.luaL_checkstring(L, 1);
-    s = L.stack[lapi.index2addr_(L, 1)].value;
     let posi = u_posrelat(lauxlib.luaL_optinteger(L, 2, 1), s.length);
     let pose = u_posrelat(lauxlib.luaL_optinteger(L, 3, posi), s.length);
 
@@ -188,7 +184,6 @@ const codepoint = function(L) {
 
 const iter_aux = function(L) {
     let s = lauxlib.luaL_checkstring(L, 1);
-    s = L.stack[lapi.index2addr_(L, 1)].value;
     let len = s.length;
     let n = lua.lua_tointeger(L, 2) - 1;