From 474af845e0b7a1136aac459d81b204886a6a004d Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 22 Nov 2017 22:35:52 +0000
Subject: [PATCH] 	PR c++/82401 	* name-lookup.c (member_name_cmp):
 Return 0 if a == b.

	* g++.dg/cpp0x/pr82401.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@255084 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/cp/ChangeLog                     |  5 +++++
 gcc/cp/name-lookup.c                 |  5 ++++-
 gcc/testsuite/ChangeLog              |  5 +++++
 gcc/testsuite/g++.dg/cpp0x/pr82401.C | 16 ++++++++++++++++
 4 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/pr82401.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index f97187eaf1c..59e890f6efd 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2017-11-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/82401
+	* name-lookup.c (member_name_cmp): Return 0 if a == b.
+
 2017-11-22  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/62170
diff --git a/gcc/cp/name-lookup.c b/gcc/cp/name-lookup.c
index 7c363b0f935..9f65c4d7992 100644
--- a/gcc/cp/name-lookup.c
+++ b/gcc/cp/name-lookup.c
@@ -1469,7 +1469,10 @@ member_name_cmp (const void *a_p, const void *b_p)
      how we order these.  Use UID as a proxy for source ordering, so
      that identically-located decls still have a well-defined stable
      ordering.  */
-  return DECL_UID (a) < DECL_UID (b) ? -1 : +1;
+  if (DECL_UID (a) != DECL_UID (b))
+    return DECL_UID (a) < DECL_UID (b) ? -1 : +1;
+  gcc_assert (a == b);
+  return 0;
 }
 
 static struct {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 36867c5990f..726773bee0d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-11-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/82401
+	* g++.dg/cpp0x/pr82401.C: New test.
+
 2017-11-22  David Malcolm  <dmalcolm@redhat.com>
 
 	PR tree-optimization/82588
diff --git a/gcc/testsuite/g++.dg/cpp0x/pr82401.C b/gcc/testsuite/g++.dg/cpp0x/pr82401.C
new file mode 100644
index 00000000000..52d40e04282
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/pr82401.C
@@ -0,0 +1,16 @@
+// PR c++/82401
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+template <typename T> struct A
+{
+  enum E : T;
+  void h ();
+};
+template <typename T> enum A<T>::E : T { e1, e2 };
+template <> enum A<long long>::E : long long {};
+template <typename T> struct C
+{
+  enum class E : T;
+};
+C<int>::E c3 = C<int>::E::e1;	// { dg-error "is not a member of" }
-- 
2.11.4.GIT