From 0556665f64b68f72910c4eabcdba0feec7679ce4 Mon Sep 17 00:00:00 2001
From: Natalie Weizenbaum <nweiz@google.com>
Date: Thu, 18 May 2017 17:05:58 -0700
Subject: [PATCH] Fix @supports (not ...). (#125)

---
 CHANGELOG.md                  | 2 ++
 lib/src/parse/stylesheet.dart | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f59a3fb8..ff565c68 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,8 @@
 * Fix a bug where Sass would crash with a "Bad state: no element" error on some
   rare `@extend` rules.
 
+* Fix `not` in parentheses in `@supports` conditions.
+
 ## 1.0.0-alpha.9
 
 * Elements without a namespace (such as `div`) are no longer unified with
diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index cc1c58fc..0e59a795 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -2524,7 +2524,10 @@ abstract class StylesheetParser extends Parser {
 
     if (next == $n || next == $N) {
       var negation = _trySupportsNegation();
-      if (negation != null) return negation;
+      if (negation != null) {
+        scanner.expectChar($rparen);
+        return negation;
+      }
     }
 
     var name = _expression();
@@ -2551,6 +2554,7 @@ abstract class StylesheetParser extends Parser {
       return null;
     }
 
+    whitespace();
     return new SupportsNegation(
         _supportsConditionInParens(), scanner.spanFrom(start));
   }