[Bug fortran/96086] ICE in gfc_match_select_rank, at fortran/match.c:6645

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96086

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-07-06
                 CC|                            |anlauf at gcc dot gnu.org
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from anlauf at gcc dot gnu.org ---
The ICE is fixed by:

diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 7d3711c55f9..cb09c5f8ec5 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -6647,7 +6647,8 @@ gfc_match_select_rank (void)
       if (expr2->symtree)
        {
          sym2 = expr2->symtree->n.sym;
-         as = sym2->ts.type == BT_CLASS ? CLASS_DATA (sym2)->as : sym2->as;
+         as = (sym2->ts.type == BT_CLASS
+               && CLASS_DATA (sym2)) ? CLASS_DATA (sym2)->as : sym2->as;
        }

       if (expr2->expr_type != EXPR_VARIABLE
@@ -6659,7 +6660,7 @@ gfc_match_select_rank (void)
          goto cleanup;
        }

-      if (expr2->ts.type == BT_CLASS)
+      if (expr2->ts.type == BT_CLASS && CLASS_DATA (sym2))
        {
          copy_ts_from_selector_to_associate (expr1, expr2);

diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 223dcccce91..ef251dc142d 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -9012,7 +9012,9 @@ resolve_assoc_var (gfc_symbol* sym, bool resolve_target)
          if (as->corank != 0)
            sym->attr.codimension = 1;
        }
-      else if (sym->ts.type == BT_CLASS && (!CLASS_DATA (sym)->as ||
sym->assoc->rankguessed))
+      else if (sym->ts.type == BT_CLASS
+              && CLASS_DATA (sym)
+              && (!CLASS_DATA (sym)->as || sym->assoc->rankguessed))
        {
          if (!CLASS_DATA (sym)->as)
            CLASS_DATA (sym)->as = gfc_get_array_spec ();