From 3d461a17d30689b5692da35fe1bd8727224a3274 Mon Sep 17 00:00:00 2001
From: Jon Schlinkert <jon.schlinkert@sellside.com>
Date: Wed, 10 Apr 2019 07:29:47 -0400
Subject: [PATCH] ensure brackets are matched

---
 lib/parse.js       | 19 +++++++++++++------
 test/regression.js |  2 +-
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/lib/parse.js b/lib/parse.js
index d7d135e..145ea26 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -43,6 +43,7 @@ const parse = (input, options = {}) => {
   let stack = [ast];
   let block = ast;
   let prev = ast;
+  let brackets = 0;
   let length = input.length;
   let index = 0;
   let depth = 0;
@@ -108,25 +109,31 @@ const parse = (input, options = {}) => {
      */
 
     if (value === CHAR_LEFT_SQUARE_BRACKET) {
+      brackets++;
+
       let closed = true;
       let next;
 
       while (index < length && (next = advance())) {
         value += next;
 
+        if (next === CHAR_LEFT_SQUARE_BRACKET) {
+          brackets++;
+          continue;
+        }
+
         if (next === CHAR_BACKSLASH) {
           value += advance();
           continue;
         }
 
         if (next === CHAR_RIGHT_SQUARE_BRACKET) {
-          closed = true;
-          break;
-        }
-      }
+          brackets--;
 
-      if (closed !== true) {
-        value = '\\' + value;
+          if (brackets === 0) {
+            break;
+          }
+        }
       }
 
       push({ type: 'text', value });
diff --git a/test/regression.js b/test/regression.js
index c9529a9..18bcb27 100644
--- a/test/regression.js
+++ b/test/regression.js
@@ -289,7 +289,7 @@ describe('bash tests', () => {
       equal('a/**/c/{d,e}/f*.{md,txt}', ['a/**/c/d/f*.md', 'a/**/c/d/f*.txt', 'a/**/c/e/f*.md', 'a/**/c/e/f*.txt']);
     });
 
-    it('should expand with extglobs.', () => {
+    it('should expand with brackets.', () => {
       equal('a/b/{d,e,[1-5]}/*.js', ['a/b/d/*.js', 'a/b/e/*.js', 'a/b/[1-5]/*.js']);
     });
   });