[Bug fortran/101329] ICE: Invalid expression in gfc_element_size

[kargl at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101329

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 = NULL;

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