re PR c++/61151 (ICE with lambda)

	PR c++/61151
	* semantics.c (is_this_parameter): Allow capture proxies too.

From-SVN: r210394

gcc/cp/ChangeLog

+2014-05-13  Jason Merrill  <jason@redhat.com>
+
+	PR c++/61151
+	* semantics.c (is_this_parameter): Allow capture proxies too.
+
 2014-05-12  Jason Merrill  <jason@redhat.com>
 
 	* call.c (maybe_print_user_conv_context): New.

gcc/cp/semantics.c

@@ -8158,8 +8158,10 @@ maybe_initialize_constexpr_call_table (void)
 bool
 is_this_parameter (tree t)
 {
-  return (TREE_CODE (t) == PARM_DECL
-	  && DECL_NAME (t) == this_identifier);
+  if (!DECL_P (t) || DECL_NAME (t) != this_identifier)
+    return false;
+  gcc_assert (TREE_CODE (t) == PARM_DECL || is_capture_proxy (t));
+  return true;
 }
 
 /* We have an expression tree T that represents a call, either CALL_EXPR

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-this18.C

+// PR c++/61151
+// { dg-do compile { target c++11 } }
+
+struct B
+{
+  void foo () {}
+};
+
+template <class>
+struct A
+{
+  template <class> void bar ();
+  B a;
+};
+
+template <class T>
+template <class U>
+void
+A<T>::bar ()
+{
+  auto f = [this] () { auto g = [=] () { a.foo (); }; g (); };
+  f ();
+}
+
+int
+main ()
+{
+  A<int> a;
+  a.bar <int> ();
+}