Problem generating index.mld pages

[bobbypriam]

I'm playing around with generating manuals via Dune (1.0+beta20). Suppose I have the following files in a directory:

hello_world.ml

let add x y = x + y

hello_world.mli

val add : int -> int -> int
(** [add x y] is x + y. *)

hello_world.opam

opam-version: "1.2"
name: "hello_world"
version: "0.1"
maintainer: "Name <email>"

jbuild

(jbuild_version 1)

(library
  ((name hello_world)
   (public_name hello_world)
   (libraries ())))

(documentation ())

index.mld

Test index.

Running jbuilder build @doc fails with:

$ jbuilder build @doc
Multiple rules generated for _build/default/_doc/_odoc/pkg/hello_world/page-index.odoc:
- <internal location>
- <internal location>

By "fails" I mean it doesn't generate anything (_build only contains log).

Note that this doesn't happen if I rename index.mld to e.g. test.mld. It will run successfully with the page available at _build/default/_doc/_html/hello_world/test.html.

Do you have any idea where I had messed up?

[rgrinberg]

That sounds like a bug. Will investigate.