From e4ef7d73d8a084f5c799d8dcde7a874a1a4e611e Mon Sep 17 00:00:00 2001
From: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 17 Oct 2017 19:36:49 +0000
Subject: [PATCH] 2017-10-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/71368
	* g++.dg/concepts/pr71368.C: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@253826 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/testsuite/ChangeLog                 |  5 +++++
 gcc/testsuite/g++.dg/concepts/pr71368.C | 25 +++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/concepts/pr71368.C

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f344a46479c..3da50bfe4f1 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-17  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/71368
+	* g++.dg/concepts/pr71368.C: New.
+
 2017-10-17  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/82560
diff --git a/gcc/testsuite/g++.dg/concepts/pr71368.C b/gcc/testsuite/g++.dg/concepts/pr71368.C
new file mode 100644
index 00000000000..f0e0a956366
--- /dev/null
+++ b/gcc/testsuite/g++.dg/concepts/pr71368.C
@@ -0,0 +1,25 @@
+// { dg-options "-std=c++17 -fconcepts" }
+
+struct inner;
+
+template<typename X> concept bool CompoundReq = requires {
+    // fine with concrete type in trailing type, i.e. inner& instead of X&
+    { X::inner_member() } -> X&;
+};
+
+template<typename X> concept bool Concept = requires {
+    { X::outer_member() } -> CompoundReq;
+};
+
+struct inner { static inner& inner_member(); };
+struct outer { static inner outer_member(); };
+
+int main()
+{
+    // fine
+    static_assert( CompoundReq<inner> );
+    static_assert( CompoundReq<decltype( outer::outer_member() )> );
+
+    // ICE
+    static_assert( Concept<outer> );
+}
-- 
2.11.4.GIT