throw error for invalid strings

11 years ago · 8a3d71b596
1 changed files with 4 additions and 1 deletions
--- a/lib/opcode.js
+++ b/lib/opcode.js
@ -28,7 +28,10 @@ Opcode.prototype.toNumber = function() {
 };

 Opcode.prototype.fromString = function(str) {
-  this.num = Opcode.map[str];
+  var num = Opcode.map[str];
+  if (typeof num === 'undefined')
+    throw new Error('Invalid opcodestr');
+  this.num = num;
  return this;
 };