From 9efb55ac054852c4ea4f082504363c2a66f41dfe Mon Sep 17 00:00:00 2001
From: Paolo Carlini <paolo.carlini@oracle.com>
Date: Tue, 17 Oct 2017 19:36:49 +0000
Subject: re PR c++/71368 ([concepts] ICE on constrained compound requirement)

2017-10-17  Paolo Carlini  <paolo.carlini@oracle.com>

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

From-SVN: r253826
---
 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 f344a46..3da50bf 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 0000000..f0e0a95
--- /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> );
+}
-- 
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