re PR c++/82075 (structured binding fails with empty base class)

	PR c++/82075
	* g++.dg/cpp1z/decomp49.C: New test.

From-SVN: r269504

gcc/testsuite/ChangeLog

+2019-03-08  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/82075
+	* g++.dg/cpp1z/decomp49.C: New test.
+
 2019-03-08  Andre Vieira  <andre.simoesdiasvieira@arm.com>
 
 	* gcc.target/arm/f16_f64_conv_no_dp.c: New test.

gcc/testsuite/g++.dg/cpp1z/decomp49.C

+// PR c++/82075
+// { dg-do run { target c++11 } }
+// { dg-options "" }
+
+struct B { };
+struct D : B { int i; };
+
+int
+main ()
+{
+  auto [i] = D{};	// { dg-warning "only available with" "" { target c++14_down } }
+  if (i != 0)
+    __builtin_abort ();
+}