From c3e18363d73c2467e72b258f0ec1e615b6d1c4bd Mon Sep 17 00:00:00 2001
From: Carson McDonald <carson@ioncannon.net>
Date: Fri, 3 May 2013 06:39:54 -0400
Subject: [PATCH 1/2] Add tests for empty nested rulesets.

---
 test/csscss/parser/css_test.rb | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/test/csscss/parser/css_test.rb b/test/csscss/parser/css_test.rb
index ad0c45b..f8838db 100644
--- a/test/csscss/parser/css_test.rb
+++ b/test/csscss/parser/css_test.rb
@@ -131,6 +131,27 @@ module Css
         ])
       end
 
+      it "recognizes empty @media queries with no spaces" do
+        css = %$
+          @media (min-width: 768px) and (max-width: 979px) {}
+        $
+
+        trans(css).must_equal([
+          rs(sel("@media (min-width: 768px) and (max-width: 979px)"), []),
+        ])
+      end
+
+      it "recognizes empty @media queries with spaces" do
+        css = %$
+          @media (min-width: 768px) and (max-width: 979px) {
+          }
+        $
+
+        trans(css).must_equal([
+          rs(sel("@media (min-width: 768px) and (max-width: 979px)"), []),
+        ])
+      end
+
       it "ignores @import statements" do
         css = %$
           @import "foo.css";

From f5c5d3b78e1c7625beeb559a7af404d68c7701bb Mon Sep 17 00:00:00 2001
From: Carson McDonald <carson@ioncannon.net>
Date: Fri, 3 May 2013 06:40:53 -0400
Subject: [PATCH 2/2] Require at least one child ruleset.

---
 lib/csscss/parser/css.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/csscss/parser/css.rb b/lib/csscss/parser/css.rb
index 7a954c7..cb799a2 100644
--- a/lib/csscss/parser/css.rb
+++ b/lib/csscss/parser/css.rb
@@ -66,7 +66,7 @@ class Parser < Parslet::Parser
             str("@") >>
             match["^{}"].repeat(1) >>
             str("{") >>
-            (comment | ruleset).repeat(0) >>
+            (comment | ruleset).repeat(1) >>
             str("}") >>
             space?
           ).as(:nested_ruleset)