result of completing-read contradicting require-match

[carlmarcos]

I am using completing-read that uses require-match, without initial-input and 
withoutdef.

If I press return so that the input is neither "name" or "name-mode", it seems 
that an empty
string is returned.  The result seems to contradict require-match being `t'.

  (let* ( (cseq '("name" "name-mode"))
          (csel (completing-read "Type: " cseq nil t nil)) )