ob-R: Error about longer than max-lines even with :result silent

[Yasushi SHOJI]

Hello,

It seems like the following ECM cause an error:
Error (org-babel): Error reading results: (user-error "Region is
longer than ‘org-table-convert-region-max-lines’ (999) lines; not
converting")

I assumed that with ":results silent" it shouldn't warn or error about
the output.  Is it expected or a bug?

,----
| #+begin_src R :results silent
|   c(1:1000)
| #+end_src
`----

Thanks,
-- 
               yashi