fix: character class escaping

Author: MrGriefs

minimatch.js

@@ -157,6 +157,7 @@ minimatch.match = (list, pattern, options = {}) => {
 
 // replace stuff like \* with *
 const globUnescape = s => s.replace(/\\(.)/g, '$1')
+const charUnescape = s => s.replace(/\\([^-\]])/g, '$1')
 const regExpEscape = s => s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
 const braExpEscape = s => s.replace(/[[\]\\]/g, '\\$&')
 
@@ -493,6 +494,11 @@ class Minimatch {
         }
 
         case '\\':
+          if (inClass && pattern.charAt(i + 1) === '-') {
+            re += c
+            continue
+          }
+
           clearStateChar()
           escaping = true
         continue
@@ -616,7 +622,7 @@ class Minimatch {
           // to do safely.  For now, this is safe and works.
           cs = pattern.substring(classStart + 1, i)
           try {
-            RegExp('[' + braExpEscape(globUnescape(cs)) + ']')
+            RegExp('[' + braExpEscape(charUnescape(cs)) + ']')
           } catch (er) {
             // not a valid class!
             sp = this.parse(cs, SUBPARSE)

tap-snapshots/test/basic.js.test.cjs

@@ -189,6 +189,10 @@ exports[`test/basic.js TAP basic tests > makeRe [[] 1`] = `
 /^(?:(?!\\.)(?=.)[\\[])$/
 `
 
+exports[`test/basic.js TAP basic tests > makeRe [\\-\\]] 1`] = `
+/^(?:(?!\\.)(?=.)[\\-\\]])$/
+`
+
 exports[`test/basic.js TAP basic tests > makeRe [\\\\] 1`] = `
 /^(?:(?!\\.)(?=.)[\\\\])$/
 `
@@ -253,6 +257,10 @@ exports[`test/basic.js TAP basic tests > makeRe [z-a] 1`] = `
 /^(?:\\[z\\-a\\])$/
 `
 
+exports[`test/basic.js TAP basic tests > makeRe [z\\-a] 1`] = `
+/^(?:(?!\\.)(?=.)[z\\-a])$/
+`
+
 exports[`test/basic.js TAP basic tests > makeRe \\ 1`] = `
 /^(?:\\\\)$/
 `

test/patterns.js

@@ -271,6 +271,8 @@ module.exports = [
   ['[\\z-a]', []],
   ['[\\b-a]', []],
   ['[]+*]', []],
+  ['[z\\-a]', []],
+  ['[\\-\\]]', []],
 ]
 
 Object.defineProperty(module.exports, 'files', {