PR#6189: items (8) and (9)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14412 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
PR#6189, items (10) and (11)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14413 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02