We correctly accept this testcase since r11-1638.
gcc/testsuite/ChangeLog:
PR c++/84689
* g++.dg/cpp0x/sfinae67.C: New test.
---
gcc/testsuite/g++.dg/cpp0x/sfinae67.C | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/cpp0x/sfinae67.C
diff --git a/gcc/testsuite/g++.dg/cpp0x/sfinae67.C
b/gcc/testsuite/g++.dg/cpp0x/sfinae67.C
new file mode 100644
index 00000000000..cfed92ad472
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/sfinae67.C
@@ -0,0 +1,20 @@
+// PR c++/84689
+// { dg-do compile { target c++11 } }
+
+struct base {
+ void operator()();
+};
+
+struct a : base { };
+struct b : base { };
+
+struct f : a, b {
+ using a::operator();
+ using b::operator();
+};
+
+template <class T> auto g(int) -> decltype(T()());
+template <class T> auto g(...) -> int;
+
+using type = decltype(g<f>(0));
+using type = int;
--
2.31.1.362.g311531c9de
