From 02560ebc1094aa488297e0d25906c84fc3d0a0f8 Mon Sep 17 00:00:00 2001
From: b-kelly <b-kelly@users.noreply.github.com>
Date: Wed, 9 Mar 2022 15:57:37 -0500
Subject: [PATCH] fix(parser): fix crash when css variable property does not
 end with a semicolon

Fixes #3698 #3373
---
 packages/less/src/less/parser/parser.js             | 2 +-
 packages/test-data/css/_main/permissive-parse.css   | 9 +++++++++
 packages/test-data/less/_main/permissive-parse.less | 7 ++++++-
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/packages/less/src/less/parser/parser.js b/packages/less/src/less/parser/parser.js
index c7a65cb07..9e46aed4b 100644
--- a/packages/less/src/less/parser/parser.js
+++ b/packages/less/src/less/parser/parser.js
@@ -1541,7 +1541,7 @@ const Parser = function Parser(context, imports, fileInfo) {
 
                         // Custom property values get permissive parsing
                         if (name[0].value && name[0].value.slice(0, 2) === '--') {
-                            value = this.permissiveValue();
+                            value = this.permissiveValue(/[;}]/);
                         }
                         // Try to store values as anonymous
                         // If we need the value later we'll re-parse it in ruleset.parseValue
diff --git a/packages/test-data/css/_main/permissive-parse.css b/packages/test-data/css/_main/permissive-parse.css
index 58eb55e60..d54021541 100644
--- a/packages/test-data/css/_main/permissive-parse.css
+++ b/packages/test-data/css/_main/permissive-parse.css
@@ -35,3 +35,12 @@ foo[attr="blah"] {
   --value: a /* { ; } */;
   --comment-within: ( /* okay?; comment; */ );
 }
+.test-no-trailing-semicolon {
+  --value: foo;
+}
+.test-no-trailing-semicolon2 {
+  --value: foo;
+}
+.test-no-trailing-semicolon3 {
+  --value: foo;
+}
diff --git a/packages/test-data/less/_main/permissive-parse.less b/packages/test-data/less/_main/permissive-parse.less
index 67b1b4211..a4c09bf31 100644
--- a/packages/test-data/less/_main/permissive-parse.less
+++ b/packages/test-data/less/_main/permissive-parse.less
@@ -47,4 +47,9 @@
 .test-rule-comment {
   --value: a/* { ; } */;
   --comment-within: ( /* okay?; comment; */ );
-}
\ No newline at end of file
+}
+.test-no-trailing-semicolon {
+  --value: foo
+}
+.test-no-trailing-semicolon2 {--value: foo}
+.test-no-trailing-semicolon3 { --value: foo }