Bug#878980: belenios FTBFS with OCaml 4.05.0

[Adrian Bunk <bunk@debian.org>]

Source: belenios
Version: 1.4+dfsg-2
Severity: serious

https://buildd.debian.org/status/package.php?p=belenios&suite=sid

...
ocamlfind ocamlopt -c -g -annot -safe-string -w A-4-6-29-44-48 -package uuidm -package atdgen -package yojson -I src/lib -o src/lib/election.cmx src/lib/election.ml
+ ocamlfind ocamlopt -c -g -annot -safe-string -w A-4-6-29-44-48 -package uuidm -package atdgen -package yojson -I src/lib -o src/lib/election.cmx src/lib/election.ml
File "src/lib/election.ml", line 1:
Error: The implementation src/lib/election.ml
       does not match the interface src/lib/election.cmi:
       ...
       At position module MakeSimpleMonad(G) : <here>
       Values do not match:
         val fold : (unit -> '_a -> 'b -> unit -> 'b) -> 'b -> unit -> 'b
       is not included in
         val fold : (unit -> elt -> 'a -> 'a t) -> 'a -> 'a t
       File "src/lib/election.ml", line 55, characters 6-10:
         Actual declaration
Command exited with code 2.
Makefile:2: recipe for target 'minimal' failed
make[2]: *** [minimal] Error 10