You can clone with
HTTPS or Subversion.
Sending the parser @"1.0" does not result in a value because the parser does not know if more data is pending. Conversely @"true", @"null", and @\"test\"" work because the parser infers a complete object.
I believe the correct approach would be to add a [parser close] method which invokes yajl_complete_parse that can be executed when the end of the stream is reached.
Close could also detach the delegate to reduce the risk of a memory leak.