[Bug fortran/90140] Compiler incorrectly rejects use of pure functions in DIMENSION attribute of procedure dummy arguments.

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90140

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-04-30
     Ever confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 7.4.0 up to trunk (10.0).
From 4.9 up to 6.5.0 the errors are

pr90140.f90:38:35:

      real(wp), dimension(ncol,nlay,  this%get_ngas()) :: vmr
                                   1
Error: 'get_ngas' at (1) should be a FUNCTION
pr90140.f90:39:37:

      real(wp), dimension(ncol,nlay,0:this%get_ngas()) :: col_gas
                                     1
Error: 'get_ngas' at (1) should be a FUNCTION

The behavior changed between revisions r247817 (2017-05-09, two errors) and
r248367 (2017-05-23, three errors) and the change has been back ported to the
GCC7 branch.

For 4.8.5 I get additional errors

Error: Function 'this' at (1) must be PURE

Work around: replace this%get_ngas() with get_ngas(this).