From 5e6ec75f384d60c244798190bf2799c67451d5a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pierre-Yves=20G=C3=A9rardy?= <py@py.gy>
Date: Thu, 13 Feb 2020 12:36:29 +0100
Subject: [PATCH 1/2] Add tests for lone and unescaped closing braces and
 brackets

---
 test/test-data-unicode.json | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/test-data-unicode.json b/test/test-data-unicode.json
index fcc9d23..6b2e16b 100644
--- a/test/test-data-unicode.json
+++ b/test/test-data-unicode.json
@@ -905,6 +905,24 @@
     "message": "atomEscape at position 1\n    \\a\n     ^",
     "input": "\\a"
   },
+  "\\-": {
+    "type": "error",
+    "name": "SyntaxError",
+    "message": "atomEscape at position 1\n    \\-\n     ^",
+    "input": "\\-"
+  },
+  "}": {
+    "type": "error",
+    "name": "SyntaxError",
+    "message": "unescaped or unmatched closing brace at position 1\n    }\n     ^",
+    "input": "}"
+  },
+  "]": {
+    "type": "error",
+    "name": "SyntaxError",
+    "message": "unescaped or unmatched closing bracket at position 1\n    ]\n     ^",
+    "input": "]"
+  },
   "[\\-]": {
     "type": "characterClass",
     "body": [

From d82c010df2d54c4847082a94e41d169b66beccb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pierre-Yves=20G=C3=A9rardy?= <py@py.gy>
Date: Thu, 13 Feb 2020 12:38:11 +0100
Subject: [PATCH 2/2] Detect lone or unmatched brackets and braces when the
 unicode flag is set

---
 parser.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/parser.js b/parser.js
index 74b5670..68849f0 100644
--- a/parser.js
+++ b/parser.js
@@ -233,6 +233,12 @@
       var _char = matches[0];
       var first = _char.charCodeAt(0);
       if (hasUnicodeFlag) {
+        if (_char === '}') {
+          bail("unescaped or unmatched closing brace");
+        }
+        if (_char === ']') {
+          bail("unescaped or unmatched closing bracket");
+        }
         var second;
         if (_char.length === 1 && first >= 0xD800 && first <= 0xDBFF) {
           second = lookahead().charCodeAt(0);