re PR fortran/85542 (ICE in check_inquiry, at fortran/expr.c:2426)

2018-05-11  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85542
	* expr.c (check_inquiry): Avoid NULL pointer dereference.
 
2018-05-11  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85542
	* gfortran.dg/pr85542.f90: New test.

From-SVN: r260182

gcc/fortran/ChangeLog

+2018-05-11  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/85542
+	* expr.c (check_inquiry): Avoid NULL pointer dereference.
+ 
 2018-05-10  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/85687

gcc/fortran/expr.c

@@ -2422,7 +2422,7 @@ check_inquiry (gfc_expr *e, int not_restricted)
 
 	/* Assumed character length will not reduce to a constant expression
 	   with LEN, as required by the standard.  */
-	if (i == 5 && not_restricted
+	if (i == 5 && not_restricted && ap->expr->symtree
 	    && ap->expr->symtree->n.sym->ts.type == BT_CHARACTER
 	    && (ap->expr->symtree->n.sym->ts.u.cl->length == NULL
 		|| ap->expr->symtree->n.sym->ts.deferred))

gcc/testsuite/ChangeLog

+2018-05-11  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/85542
+	* gfortran.dg/pr85542.f90: New test.
+
 2018-05-11  Martin Jambor  <mjambor@suse.cz>
 
 	PR ipa/85655

gcc/testsuite/gfortran.dg/pr85542.f90

+! { dg-do compile }
+! PR fortran/85542
+function f(x)
+   character(*), intent(in) :: x
+   character((len((x)))) :: f
+   f = x
+end