[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/doctrine/lib/utility.js

@@ -0,0 +1,35 @@
+/*
+ * @fileoverview Utilities for Doctrine
+ * @author Yusuke Suzuki <utatane.tea@gmail.com>
+ */
+
+
+(function () {
+    'use strict';
+
+    var VERSION;
+
+    VERSION = require('../package.json').version;
+    exports.VERSION = VERSION;
+
+    function DoctrineError(message) {
+        this.name = 'DoctrineError';
+        this.message = message;
+    }
+    DoctrineError.prototype = (function () {
+        var Middle = function () { };
+        Middle.prototype = Error.prototype;
+        return new Middle();
+    }());
+    DoctrineError.prototype.constructor = DoctrineError;
+    exports.DoctrineError = DoctrineError;
+
+    function throwError(message) {
+        throw new DoctrineError(message);
+    }
+    exports.throwError = throwError;
+
+    exports.assert = require('assert');
+}());
+
+/* vim: set sw=4 ts=4 et tw=80 : */