Reopen the log files, Error: write after end about morgan HOT 4 CLOSED

+exports.stream
+
 exports = module.exports = function morgan(format, options) {
   if (typeof format === 'object') {
     options = format
@@ -56,12 +58,12 @@
   var fmt = compile(exports[format] || format || exports.default)

   // options
-  var stream = options.stream || process.stdout
+  exports.stream = options.stream || process.stdout
     , buffer = options.buffer;

   // buffering support
   if (buffer) {
-    var realStream = stream
+    var realStream = exports.stream
     var buf = []
     var timer = null
     var interval = 'number' == typeof buffer
@@ -79,7 +81,7 @@
     }

     // swap the stream
-    stream = {
+    exports.stream = {
       write: function(str){
         if (timer === null) {
           timer = setTimeout(flush, interval)
@@ -99,7 +101,7 @@
       if (skip(req, res)) return;
       var line = fmt(exports, req, res);
       if (null == line) return;
-      stream.write(line + '\n');
+      exports.stream.write(line + '\n');