From 7ef345bee73f6cc843b0d82866d036a3ac5829ca Mon Sep 17 00:00:00 2001
From: Benoit Giannangeli <giann008@gmail.com>
Date: Fri, 5 May 2017 15:24:00 +0200
Subject: Binary chunk can be a lua string (string.dump)

---
 src/ldo.js                |  4 +++-
 src/lundump.js            |  4 ++--
 tests/test-suite/calls.js | 35 +++++++++++++++++++++++++++++++----
 3 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/src/ldo.js b/src/ldo.js
index 9ef8b66..13bd15c 100644
--- a/src/ldo.js
+++ b/src/ldo.js
@@ -574,7 +574,9 @@ const f_parser = function(L, p) {
     let c = p.z.getc();  /* read first character */
     if (c === defs.LUA_SIGNATURE.charCodeAt(0)) {
         checkmode(L, p.mode, defs.to_luastring("binary", true));
-        cl = new BytecodeParser(L, p.z.buffer, p.name).luaU_undump();
+        let buff = p.z.buffer;
+        if (Array.isArray(buff)) buff = new DataView(new Uint8Array(p.z.buffer).buffer);  /* Lua string holding binary (string.dump) */
+        cl = new BytecodeParser(L, buff, p.name).luaU_undump();
     } else {
         checkmode(L, p.mode, defs.to_luastring("text", true));
         cl = lparser.luaY_parser(L, p.z, p.buff, p.dyd, p.name, c);
diff --git a/src/lundump.js b/src/lundump.js
index 5d158bd..26405d6 100644
--- a/src/lundump.js
+++ b/src/lundump.js
@@ -8,11 +8,11 @@ const lfunc    = require('./lfunc.js');
 const lobject  = require('./lobject.js');
 const lopcodes = require('./lopcodes.js');
 
-const LUAI_MAXSHORTLEN = 40;
-
 class BytecodeParser {
 
     constructor(L, dataView, name) {
+        assert(dataView instanceof DataView, "BytecodeParser only operates on a dataView")
+
         this.L = L;
         this.intSize = 4;
         this.size_tSize = 8;
diff --git a/tests/test-suite/calls.js b/tests/test-suite/calls.js
index f7ea559..bccad87 100644
--- a/tests/test-suite/calls.js
+++ b/tests/test-suite/calls.js
@@ -378,7 +378,6 @@ test("[test-suite] calls: test for generic load", function (t) {
         function read1 (x)
           local i = 0
           return function ()
-            --print(x)
             i=i+1
             return string.sub(x, i, i)
           end
@@ -401,7 +400,7 @@ test("[test-suite] calls: test for generic load", function (t) {
         assert(not load(function () return true end))
     `, L;
     
-    t.plan(1);
+    t.plan(2);
 
     t.doesNotThrow(function () {
 
@@ -413,10 +412,38 @@ test("[test-suite] calls: test for generic load", function (t) {
 
     }, "Lua program loaded without error");
 
-    // t.doesNotThrow(function () {
+    t.doesNotThrow(function () {
 
         lua.lua_call(L, 0, -1);
 
-    // }, "Lua program ran without error");
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] calls: small bug", function (t) {
+    let luaCode = `
+        local t = {nil, "return ", "3"}
+        f, msg = load(function () return table.remove(t, 1) end)
+        assert(f() == nil)   -- should read the empty chunk
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lauxlib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
 
 });
-- 
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