[Bug fortran/41579] New: [OOP/Polymorphism] Nesting of SELECT TYPE

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

See review comment http://gcc.gnu.org/ml/fortran/2009-09/msg00298.html

For two longer test cases, see 
http://gcc.gnu.org/ml/fortran/2009-09/msg00295.html


Currently, SELECT TYPE(type) uses:

+  /* Special case: If we're in a SELECT TYPE block,
+     replace the selector variable by a temporary.  */
+  if (gfc_current_state () == COMP_SELECT_TYPE
+      && st && st->n.sym == type_selector)
+    st = select_type_tmp;
+

That fails
(a) If the current state is not COMP_SELECT_TYPE
(b) If one nests SELECT TYPE

Example:

select type (mt2)
  type is(t2)
    mt2%i = 5
    select type(mt3)
      type is(t3)
        mt3%j = mt2%i
      class default
        stop 'error'
    end select
  class default
    stop 'error'
end select

        mt3%j = mt2%i
                     1
Error: 'i' at (1) is not a member of the 't1' structure


-- 
           Summary: [OOP/Polymorphism] Nesting of SELECT TYPE
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          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=41579