call postSend after sending

Author: santigimeno

lib/internal/child_process.js

@@ -627,13 +627,16 @@ function setupChannel(target, channel) {
     var err = channel.writeUtf8String(req, string, handle);
 
     if (err === 0) {
-      if (handle && !this._handleQueue)
-        this._handleQueue = [];
+      if (handle) {
+        if (!this._handleQueue)
+          this._handleQueue = [];
+        if (obj && obj.postSend)
+          obj.postSend(handle, options, target);
+      }
+
       req.oncomplete = function() {
         if (this.async === true)
           control.unref();
-        if (obj && obj.postSend)
-          obj.postSend(handle, options, target);
         if (typeof callback === 'function')
           callback(null);
       };