From dc689dccf1ba836ffec24d5454e69deabe8a5c4a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kornel=20Lesin=CC=81ski?= <kornel.lesinski@ft.com>
Date: Mon, 9 Jun 2014 21:26:19 +0100
Subject: [PATCH] eval is not available during expansion

---
 contextualize.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contextualize.cpp b/contextualize.cpp
index 337173d43..a0b790149 100644
--- a/contextualize.cpp
+++ b/contextualize.cpp
@@ -117,10 +117,10 @@ namespace Sass {
   { return s; }
 
   Selector* Contextualize::operator()(Attribute_Selector* s)
-  { 
+  {
     // the value might be interpolated; evaluate it
     String* v = s->value();
-    if (v) {
+    if (v && eval) {
       v = static_cast<String*>(v->perform(eval->with(env, backtrace)));
     }
     Attribute_Selector* ss = new (ctx.mem) Attribute_Selector(*s);