From d079c885088575c15291dff5519a6e7a092f21d0 Mon Sep 17 00:00:00 2001
From: Olzhas Suleimen <amajisenpai@gmail.com>
Date: Sun, 18 Jun 2023 19:51:41 +0600
Subject: [PATCH 1/2] Update processFont to handle null expressions.

---
 lib/parser.dart | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/parser.dart b/lib/parser.dart
index 15dd764..d28c013 100644
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -2852,9 +2852,9 @@ class ExpressionsProcessor {
     }
 
     return FontExpression(_exprs.span,
-        size: fontSize!.font.size,
-        lineHeight: fontSize.font.lineHeight,
-        family: fontFamily!.font.family);
+        size: fontSize?.font.size,
+        lineHeight: fontSize?.font.lineHeight,
+        family: fontFamily?.font.family);
   }
 }
 

From 08a4e8912fa30ee3d7613de4629fab2bfbee9d2f Mon Sep 17 00:00:00 2001
From: Olzhas Suleimen <amajisenpai@gmail.com>
Date: Sat, 24 Jun 2023 18:46:50 +0600
Subject: [PATCH 2/2] Guidelines.

---
 CHANGELOG.md               |  4 ++++
 pubspec.yaml               |  2 +-
 test/declaration_test.dart | 28 ++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70e7747..a4631cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.1-dev
+
+- Update `processFont` to handle null expressions.
+
 ## 1.0.0
 
 - Rev to `1.0.0` (note however that there are no API changes from `0.17.x`).
diff --git a/pubspec.yaml b/pubspec.yaml
index e0eab9a..694514a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: csslib
-version: 1.0.0
+version: 1.0.1-dev
 description: A library for parsing and analyzing CSS (Cascading Style Sheets).
 repository: https://github.com/dart-lang/csslib
 
diff --git a/test/declaration_test.dart b/test/declaration_test.dart
index 5dc24f6..6406efd 100644
--- a/test/declaration_test.dart
+++ b/test/declaration_test.dart
@@ -260,6 +260,33 @@ void testUnits() {
   expect(prettyPrint(stylesheet), generated);
 }
 
+void testNoValues() {
+  var errors = <Message>[];
+  final input = r'''
+.foo {
+  color: ;
+}
+.bar {
+  font:;
+  color: blue;
+}
+''';
+
+  final generated = r'''
+.foo {
+  color: ;
+}
+.bar {
+  font: ;
+  color: #00f;
+}''';
+
+  var stylesheet = parseCss(input, errors: errors, opts: simpleOptions);
+
+  expect(errors.isEmpty, true, reason: errors.toString());
+  expect(prettyPrint(stylesheet), generated);
+}
+
 void testUnicode() {
   var errors = <Message>[];
   final input = r'''
@@ -1435,6 +1462,7 @@ void main() {
   test('Identifiers', testIdentifiers);
   test('Composites', testComposites);
   test('Units', testUnits);
+  test('No Values', testNoValues);
   test('Unicode', testUnicode);
   test('Newer CSS', testNewerCss);
   test('Media Queries', testMediaQueries);