From f6c20068b0ddcf1cbd850ea7fb9040ce19eff6a2 Mon Sep 17 00:00:00 2001
From: Christophe Coevoet <stof@notk.org>
Date: Wed, 29 Oct 2025 00:54:54 +0100
Subject: [PATCH] Fix the operator span when parsing a standalone `%`

---
 CHANGELOG.md                  | 4 ++++
 lib/src/parse/stylesheet.dart | 3 ++-
 pubspec.yaml                  | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68f510e21..198774076 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.93.3-dev
+
+* Fix the span reported for standalone `%` expressions followed by whitespace.
+
 ## 1.93.2
 
 * No user-visible changes.
diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index 9849bbbfa..e5572e3d9 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -2128,11 +2128,12 @@ abstract class StylesheetParser extends Parser {
           length: operator.operator.length,
         );
       }
+      var operatorEnd = scanner.position;
       whitespace(consumeNewlines: true);
 
       if (operator == BinaryOperator.modulo && !_lookingAtExpression()) {
         addSingleExpression(StringExpression.plain(
-            '%', scanner.spanFromPosition(scanner.position - 1)));
+            '%', scanner.spanFromPosition(operatorEnd - 1, operatorEnd)));
       } else {
         operators.add(operator);
         operands.add(singleExpression);
diff --git a/pubspec.yaml b/pubspec.yaml
index 8ea5cf123..cfbd482dc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sass
-version: 1.93.2
+version: 1.93.3-dev
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass