re PR fortran/86110 (ICE in gfc_resolve_character_array_constructor, at fortran/array.c:2044)

2018-06-13  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/86110
	* array.c (gfc_resolve_character_array_constructor): Avoid NULL 
	pointer dereference.

2018-06-13  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/86110
	* gfortran.dg/pr86110.f90: New test.

From-SVN: r261561

gcc/fortran/ChangeLog

+2018-06-13  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/86110
+	* array.c (gfc_resolve_character_array_constructor): Avoid NULL 
+	pointer dereference.
+
 2018-06-13  Cesar Philippidis  <cesar@codesourcery.com>
 
 	PR fortran/85703

gcc/fortran/array.c

@@ -2040,7 +2040,9 @@ got_charlen:
 	  gfc_ref *ref;
 	  for (ref = p->expr->ref; ref; ref = ref->next)
 	    if (ref->type == REF_SUBSTRING
+		&& ref->u.ss.start
 		&& ref->u.ss.start->expr_type == EXPR_CONSTANT
+		&& ref->u.ss.end
 		&& ref->u.ss.end->expr_type == EXPR_CONSTANT)
 	      break;
 

gcc/testsuite/ChangeLog

+2018-06-13  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/86110
+	* gfortran.dg/pr86110.f90: New test.
+
 2018-06-13  Cesar Philippidis  <cesar@codesourcery.com>
 
 	PR fortran/85703

gcc/testsuite/gfortran.dg/pr86110.f90

+! { dg-do compile }
+! PR fortran/86110
+program p
+   character(:), allocatable :: x, y
+   x = 'abc'
+   y = [x(:)]  ! { dg-error "Incompatible ranks 0 and 1" }
+end