[Bug fortran/33230] New: Missing check: specification function must be pure

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

gfortran -std=f95 -pedantic -Wall -fall-intrinsics
gfortran.dg/char_result_7.f90

Compiles, but as g95 remarks:
  Error: Specification function 'fn' at (1) must be PURE
which NAG f95 confirms:
  Error: Reference to non-specification function FN in specification
and ifort joins in as well:
  An explicit interface is required for a specification function.   [FN]

Excerpt of that file (see testsuite for the full program):

  function f2 (fn, i)
    integer :: i, fn
    character (len = fn (i)) :: f2

Called as "f2 (double, 70)" where DOUBLE is pure.


-- 
           Summary: Missing check: specification function must be pure
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33230