Destroy REPL pipes instead of shutting down.

lib/repl.js

@@ -111,7 +111,7 @@ REPLServer.prototype.parseREPLKeyword = function (cmd) {
     self.displayPrompt();
     return true;
   case ".exit":
-    self.stream.end();
+    self.stream.destroy();
     return true;
   case ".help":
     self.stream.write(".break\tSometimes you get stuck in a place you can't get out... This will get you out.\n");