[Bug fortran/42651] Functions with result: Wrongly accepts attributes to function name

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42651

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
                 CC|                            |kargl at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |kargl at gcc dot gnu.org

--- Comment #2 from kargl at gcc dot gnu.org ---
From F2018, 

  C1560 (R1530) If RESULT appears, the function-name shall not appear
  in any specification statement in the scoping unit of the function
  subprogram.

Note, a similar constraint appears in F2003.

Thus, the error messages in comment #1 are correct.  The problem
is that the matchers for some attribute statements do not check
for a problem.  I have a fix for the one in the code contained
herein.