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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/101329] ICE: Invalid expression in gfc_element_size
Date: Mon, 05 Jul 2021 17:59:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101329

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-07-05
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |kargl at gcc dot gnu.org

--- Comment #1 from kargl at gcc dot gnu.org ---
diff --git a/gcc/fortran/check.c b/gcc/fortran/check.c
index 27bf3a7eafe..98155ce9d4c 100644
--- a/gcc/fortran/check.c
+++ b/gcc/fortran/check.c
@@ -5217,6 +5217,12 @@ is_c_interoperable (gfc_expr *expr, const char **msg,
bool c_loc, bool c_f_ptr)
 {
   *msg =3D NULL;

+  if (expr->expr_type =3D=3D EXPR_NULL)
+    {
+      *msg =3D "NULL() is not interoperable";
+      return false;
+    }
+
   if (expr->ts.type =3D=3D BT_CLASS)
     {
       *msg =3D "Expression is polymorphic";=