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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/99765] Explicit dimension size declaration of pointer
 array allowed
Date: Thu, 25 Mar 2021 11:43:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99765

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-03-25
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The standard says:

C832 An array with the POINTER or ALLOCATABLE attribute shall have an
array-spec=20
that is a deferred-shape-spec-list.

so I think

  real, dimension(10), pointer :: a(:) =3D> null()

and

  real, dimension(10), allocatable :: a(10)

are invalid and shall give an error.

Note that a(1:2)(1:10) looks like C syntax, a rank 2 array is a(1:2,1:10).
The only case for valid fortran is for a being of type CHARACTER, a(1;2) be=
ing
a slice and (1:10) a substring.=