Binary chunk can be a lua string (string.dump)

2 files changed, 5 insertions, 3 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;