--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp0x/pr65398.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,70 @@
+// PR c++/65398
+// { dg-do compile { target c++11 } }
+
+#define SA(X) static_assert((X),#X)
+
+constexpr char s[] = "abc";
+constexpr char c1 = *(&s[0] + 0);
+constexpr char c2 = *(&s[0] + 1);
+constexpr char c3 = *(&s[1] + 0);
+constexpr char c4 = *(&s[1] + 1);
+constexpr char c5 = *(&s[2] + 0);
+constexpr char c6 = *(&s[0] + 2);
+constexpr char c7 = *(&s[2] + 1);
+
+constexpr char d1 = *(&s[4] - 0); // { dg-error "array subscript" }
+constexpr char d2 = *(&s[4] - 1);
+constexpr char d3 = *(&s[4] - 2);
+constexpr char d4 = *(&s[4] - 3);
+constexpr char d5 = *(&s[4] - 4);
+constexpr char d6 = *(&s[4] - 5);  // { dg-error "array subscript" }
+
+/* Don't accept invalid stuff.  */
+constexpr char e1 = *(&s[5] - 1); // { dg-error "array subscript" }
+constexpr char e2 = *(&s[5] - 2); // { dg-error "array subscript" }
+constexpr char e3 = *(&s[5] - 3); // { dg-error "array subscript" }
+
+SA (c1 == 'a');
+SA (c2 == 'b');
+SA (c3 == 'b');
+SA (c4 == 'c');
+SA (c5 == 'c');
+SA (c6 == 'c');
+SA (c7 == '\0');
+SA (d2 == '\0');
+SA (d3 == 'c');
+SA (d4 == 'b');
+SA (d5 == 'a');
+
+constexpr int l[] = { 'c', 'd', 'e', '\0' };
+constexpr int i1 = *(&l[0] + 0);
+constexpr int i2 = *(&l[0] + 1);
+constexpr int i3 = *(&l[1] + 0);
+constexpr int i4 = *(&l[1] + 1);
+constexpr int i5 = *(&l[2] + 0);
+constexpr int i6 = *(&l[0] + 2);
+constexpr int i7 = *(&l[2] + 1);
+
+constexpr char j1 = *(&l[4] - 0); // { dg-error "array subscript" }
+constexpr char j2 = *(&l[4] - 1);
+constexpr char j3 = *(&l[4] - 2);
+constexpr char j4 = *(&l[4] - 3);
+constexpr char j5 = *(&l[4] - 4);
+constexpr char j6 = *(&l[4] - 5);  // { dg-error "array subscript" }
+
+/* Don't accept invalid stuff.  */
+constexpr char k1 = *(&l[5] - 1); // { dg-error "array subscript" }
+constexpr char k2 = *(&l[5] - 2); // { dg-error "array subscript" }
+constexpr char k3 = *(&l[5] - 3); // { dg-error "array subscript" }
+
+SA (i1 == 'c');
+SA (i2 == 'd');
+SA (i3 == 'd');
+SA (i4 == 'e');
+SA (i5 == 'e');
+SA (i6 == 'e');
+SA (i7 == '\0');
+SA (j2 == '\0');
+SA (j3 == 'e');
+SA (j4 == 'd');
+SA (j5 == 'c');