From ee9d41ae404e0bfd96205d9eba94dee59acd8eb8 Mon Sep 17 00:00:00 2001
From: tanay <tanay@neotia.in>
Date: Sat, 12 Jun 2021 14:22:48 -0400
Subject: [PATCH] Fix css_parser null error when using CSS with @ declarations

---
 lib/src/css_parser.dart | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/src/css_parser.dart b/lib/src/css_parser.dart
index 700c729a7c..a46a6d6ad6 100644
--- a/lib/src/css_parser.dart
+++ b/lib/src/css_parser.dart
@@ -370,7 +370,11 @@ class DeclarationVisitor extends css.Visitor {
 
   @override
   void visitExpressions(css.Expressions node) {
-    _properties[_currentProperty]!.addAll(node.expressions);
+    if (_properties[_currentProperty] != null) {
+      _properties[_currentProperty]!.addAll(node.expressions);
+    } else {
+      _properties[_currentProperty] = node.expressions;
+    }
   }
 }