[pushed] c++: add fixed test [PR66519]

[Marek Polacek]

Tested x86_64-pc-linux-gnu, applying to trunk.

-- >8 --
Fixed by r10-6464.

        PR c++/66519

gcc/testsuite/ChangeLog:

        * g++.dg/cpp0x/variadic-parm2.C: New test.
---
 gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C

diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C 
b/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C
new file mode 100644
index 00000000000..b061adbd7a9
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C
@@ -0,0 +1,12 @@
+// PR c++/66519
+// { dg-do compile { target c++11 } }
+
+template<typename F, typename... Tp>
+void a(F f, Tp... args, decltype(f(args...)) = 1) {}
+
+template<typename F, typename... Tp>
+void a(F, Tp...) {}
+
+void b(void) {
+    a([]{});
+}

base-commit: 589d79e6268b055422a7b6c11cd0a8a4f2531a8c
-- 
2.48.1