From e58238bd17f77127ab862d991b8ec18de740ffc4 Mon Sep 17 00:00:00 2001
From: hokaccha <k.hokamura@gmail.com>
Date: Wed, 25 Jan 2012 09:51:39 +0900
Subject: [PATCH] Fix callback called two times

---
 lib/less/parser.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/less/parser.js b/lib/less/parser.js
index 51c8e03f5..268226e41 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -309,17 +309,21 @@ less.Parser = function Parser(env) {
                     }
                 }
                 if (level > 0) {
-                    return callback(new(LessError)({
+                    error = new(LessError)({
                         index: i,
                         type: 'Parse',
                         message: "missing closing `}`",
                         filename: env.filename
-                    }, env));
+                    }, env);
                 }
 
                 return chunks.map(function (c) { return c.join('') });;
             })([[]]);
 
+            if (error) {
+                return callback(error);
+            }
+
             // Start with the primary rule.
             // The whole syntax tree is held under a Ruleset node,
             // with the `root` property set to true, so no `{}` are