throw on all bad filters

lib/filters/index.js

@@ -114,6 +114,10 @@ function _buildFilterTree(expr) {
     var operatorStr = '';
     tree.name = '';
     tree.value = '';
+
+    if (!/[a-zA-Z0-9;\-]+[~><:]?=.+/.test(expr))
+      throw new Error(expr + ' is invalid');
+
     if (expr.indexOf('~=') !== -1) {
       operatorStr = '~=';
       tree.tag = 'approxMatch';

package.json

@@ -10,7 +10,7 @@
   "name": "ldapjs",
   "homepage": "http://ldapjs.org",
   "description": "LDAP client and server APIs",
-  "version": "0.5.8",
+  "version": "0.5.9",
   "repository": {
     "type": "git",
     "url": "git://github.com/mcavage/node-ldapjs.git"

test/filters/parse.test.js

@@ -130,3 +130,10 @@ test('bogus filter', function (t) {
   });
   t.end();
 });
+
+test('bogus filter !=', function (t) {
+  t.throws(function () {
+    parse('foo!=1');
+  });
+  t.end();
+});