End mute stream so it un-pipes

Fix npm#11

lib/read.js

@@ -12,7 +12,7 @@ function read (opts, cb) {
   var input = opts.input || process.stdin
   var output = opts.output || process.stdout
   var m = new Mute({ replace: opts.replace })
-  m.pipe(output)
+  m.pipe(output, {end: false})
   output = m
   var def = opts.default || ''
   var terminal = !!(opts.terminal || output.isTTY)
@@ -65,6 +65,7 @@ function read (opts, cb) {
     rl.close()
     clearTimeout(timer)
     output.mute()
+    output.end()
   }
 
   function onError (er) {

test/many.js

@@ -0,0 +1,76 @@
+var tap = require('tap')
+var read = require('../lib/read.js')
+
+if (process.argv[2] === 'child') {
+  return child()
+}
+
+var spawn = require('child_process').spawn
+function child () {
+  read({prompt:'1'}, function (er, r1) {if (er) throw er
+  read({prompt:'2'}, function (er, r2) {if (er) throw er
+  read({prompt:'3'}, function (er, r3) {if (er) throw er
+  read({prompt:'4'}, function (er, r4) {if (er) throw er
+  read({prompt:'5'}, function (er, r5) {if (er) throw er
+  read({prompt:'6'}, function (er, r6) {if (er) throw er
+  read({prompt:'7'}, function (er, r7) {if (er) throw er
+  read({prompt:'8'}, function (er, r8) {if (er) throw er
+  read({prompt:'9'}, function (er, r9) {if (er) throw er
+  read({prompt:'10'}, function (er, r10) {if (er) throw er
+  read({prompt:'11'}, function (er, r11) {if (er) throw er
+  read({prompt:'12'}, function (er, r12) {if (er) throw er
+  read({prompt:'13'}, function (er, r13) {if (er) throw er
+  read({prompt:'14'}, function (er, r14) {if (er) throw er
+  read({prompt:'15'}, function (er, r15) {if (er) throw er
+  read({prompt:'16'}, function (er, r16) {if (er) throw er
+  read({prompt:'17'}, function (er, r17) {if (er) throw er
+  read({prompt:'18'}, function (er, r18) {if (er) throw er
+    console.log(r1, r2, r3, r4, r5, r6, r7, r8, r9, r10,
+                r11, r12, r13, r14, r15, r16, r17, r18)
+  })})})})})})})})})})})})})})})})})})
+}
+
+tap.test('many reads', function (t) {
+  var child = spawn(process.execPath, [__filename, 'child'])
+  var n = 0
+  var output = ''
+  var expect = '1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ' +
+               '16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 ' +
+               '13 14 15 16 17 18\n'
+  var write = child.stdin.write.bind(child.stdin)
+  var answers =
+      [ '1\n',
+        '2\n',
+        '3\n',
+        '4\n',
+        '5\n',
+        '6\n',
+        '7\n',
+        '8\n',
+        '9\n',
+        '10\n',
+        '11\n',
+        '12\n',
+        '13\n',
+        '14\n',
+        '15\n',
+        '16\n',
+        '17\n',
+        '18\n' ]
+  child.stdout.on('data', function (c) {
+    n++;
+    output += c
+    if (answers.length) {
+      write(answers.shift())
+    }
+  })
+  child.stderr.on('data', function (c) {
+    output += c
+    console.error('' + c)
+  })
+  child.on('close', function (c) {
+    t.equal(output, expect)
+    t.equal(n, 19)
+    t.end()
+  })
+})