Fix: Cannot read properties of null for setRawMode

Author: asaid-0

lib/tty.js

@@ -72,7 +72,7 @@ ObjectSetPrototypeOf(ReadStream, net.Socket);
 
 ReadStream.prototype.setRawMode = function(flag) {
   flag = !!flag;
-  const err = this._handle.setRawMode(flag);
+  const err = this._handle && this._handle.setRawMode(flag);
   if (err) {
     this.emit('error', errors.errnoException(err, 'setRawMode'));
     return this;