handlebars.runtime.js in handlebars-source-3.0.7 vs handlebars.runtime.js in handlebars-source-3.0.8

@@ -1,8 +1,8 @@
 /*!
 
- handlebars v3.0.7
+ handlebars v3.0.8
 
 Copyright (C) 2011-2014 by Yehuda Katz
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -427,11 +427,11 @@
 
 	  instance.registerHelper('lookup', function (obj, field) {
 	    if (!obj) {
 	      return obj;
 	    }
-	    if (field === 'constructor' && !obj.propertyIsEnumerable(field)) {
+	    if (Utils.dangerousPropertyRegex.test(String(field)) && !Object.prototype.hasOwnProperty.call(obj, field)) {
 	      return undefined;
 	    }
 	    return obj[field];
 	  });
 	}
@@ -585,9 +585,12 @@
 	}
 
 	function appendContextPath(contextPath, id) {
 	  return (contextPath ? contextPath + '.' : '') + id;
 	}
+
+	var dangerousPropertyRegex = /^(constructor|__defineGetter__|__defineSetter__|__lookupGetter__|__proto__)$/;
+	exports.dangerousPropertyRegex = dangerousPropertyRegex;
 
 /***/ }),
 /* 5 */
 /***/ (function(module, exports, __webpack_require__) {
 
\ No newline at end of file