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(* A bug in the guard checking of nested cofixpoints. *)
(* Posted by Maxime Dénès on coqdev (Apr 9, 2014). *)
CoInductive CoFalse := .
CoInductive CoTrue := I.
Fail CoFixpoint loop : CoFalse :=
(cofix f := loop with g := loop for f).
Fail CoFixpoint loop : CoFalse :=
(cofix f := I with g := loop for g).
Fail CoFixpoint loop : CoFalse :=
(cofix f := loop with g := I for f).
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