From 6cb838a3ba710981eac87fcbadc4472fb559bc1f Mon Sep 17 00:00:00 2001
From: Daniel Puckowski <puckowski.d@gmail.com>
Date: Thu, 28 Nov 2024 05:59:38 -0500
Subject: [PATCH] fix(issue:4264) strip line comment from expression

* Fix for issue #4264. Strip line comments from expressions to avoid
  invalid CSS output.
---
 packages/less/src/less/parser/parser.js      |  2 +-
 packages/test-data/css/_main/variables.css   | 15 +++++++++++++++
 packages/test-data/less/_main/variables.less | 16 ++++++++++++++++
 3 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/packages/less/src/less/parser/parser.js b/packages/less/src/less/parser/parser.js
index 59aa2eef4..54ef86a32 100644
--- a/packages/less/src/less/parser/parser.js
+++ b/packages/less/src/less/parser/parser.js
@@ -2392,7 +2392,7 @@ const Parser = function Parser(context, imports, fileInfo, currentIndex) {
 
                 do {
                     e = this.comment();
-                    if (e) {
+                    if (e && !e.isLineComment) {
                         entities.push(e);
                         continue;
                     }
diff --git a/packages/test-data/css/_main/variables.css b/packages/test-data/css/_main/variables.css
index fa03b1eb7..b0c22c53e 100644
--- a/packages/test-data/css/_main/variables.css
+++ b/packages/test-data/css/_main/variables.css
@@ -69,3 +69,18 @@
   mul-px-2: 140px;
   mul-px-3: 140px;
 }
+div#apple {
+  color: blue;
+}
+div#banana {
+  color: blue;
+}
+div#cherry {
+  color: blue;
+}
+div#carrot {
+  color: blue;
+}
+div#potato {
+  color: blue;
+}
diff --git a/packages/test-data/less/_main/variables.less b/packages/test-data/less/_main/variables.less
index ae8c9be45..2fcb7977d 100644
--- a/packages/test-data/less/_main/variables.less
+++ b/packages/test-data/less/_main/variables.less
@@ -125,3 +125,19 @@
     mul-px-3: ((@px * 1) * @cm);
   }
 }
+
+@items:
+// Fruit
+    apple,
+    banana,
+    cherry,
+// Vegetables
+    carrot,
+    potato,
+;
+
+each(@items, {
+  div#@{value} {
+    color: blue;
+  }
+})