https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66544

janus at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |janus at gcc dot gnu.org
            Summary|ICE on function with        |[F03] ICE on function with
                   |pointer result in           |procedure-pointer result in
                   |combination with implicit   |combination with implicit
                   |none                        |none

--- Comment #3 from janus at gcc dot gnu.org ---
Note that the interface of the function 'f' is somewhat
recursive/self-referential: The function f returns a pointer to a function that
has the same interface as itself, namely returning a pointer to a function that
has the same interface as itself, returning a pointer to a function ... (ad
inf.)

I'm not sure if that is allowed in any version of the Fortran standard. There
are other self-reference restrictions in the language, e.g. for derived types,
some of which have been loosened in F08 (see e.g. PR45516).

Do you actually have a real-world problem where such a construction is
necessary, or are you just trying to break the compiler? ;)

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