re PR c++/77786 (ICE in tsubst_copy, at cp/pt.c:13040)

	PR c++/77786
	* g++.dg/cpp1y/pr77786.C: New test.

From-SVN: r253614

gcc/testsuite/ChangeLog

 2017-10-10  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/77786
+	* g++.dg/cpp1y/pr77786.C: New test.
+
 	PR c++/71875
 	* g++.dg/cpp1y/pr71875.C: New test.
 

gcc/testsuite/g++.dg/cpp1y/pr77786.C

+// PR c++/77786
+// { dg-do compile { target c++14 } }
+
+#include <vector>
+
+template<int N>
+void
+foo (std::vector<int> a)
+{
+  auto const a_size = a.size();
+  auto bar = [&](auto y) -> void { int a_size_2 = a_size; };
+  double x = 0.0;
+  bar (x);
+}
+
+int
+main ()
+{
+  std::vector<int> a(1);
+  foo<1>(a);
+}