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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95502] ICE in gfc_check_do_variable, at
 fortran/parse.c:4446
Date: Wed, 03 Jun 2020 16:52:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95502

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargl at gcc dot gnu.org
   Last reconfirmed|                            |2020-06-03
           Priority|P3                          |P4
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from kargl at gcc dot gnu.org ---
Fixes z1.f90.  May fix others.

Index: gcc/fortran/parse.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- gcc/fortran/parse.c (revision 280157)
+++ gcc/fortran/parse.c (working copy)
@@ -4440,6 +4440,9 @@ gfc_check_do_variable (gfc_symtree *st)
 {
   gfc_state_data *s;

+  if (!st)
+    return 0;
+
   for (s=3Dgfc_state_stack; s; s =3D s->previous)
     if (s->do_variable =3D=3D st)
       {
Index: gcc/fortran/expr.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- gcc/fortran/expr.c  (revision 280157)
+++ gcc/fortran/expr.c  (working copy)
@@ -3784,6 +3784,9 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *
   int proc_pointer;
   bool same_rank;

+  if (!lvalue->symtree)
+    return false;
+
   lhs_attr =3D gfc_expr_attr (lvalue);
   if (lvalue->ts.type =3D=3D BT_UNKNOWN && !lhs_attr.proc_pointer)
     {=