From 67378ae56d23c9109e6fe1176d40dcee23e422aa Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 20 Feb 2017 06:03:45 +0000
Subject: [PATCH] 	PR c++/79503 - inherited ctor taking base class

	* call.c (add_function_candidate): Also check that
	DECL_INHERITED_CTOR_BASE is reference-related to the parameter type.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@245586 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/cp/ChangeLog                        |  6 ++++++
 gcc/cp/call.c                           |  4 +++-
 gcc/testsuite/g++.dg/cpp0x/inh-ctor26.C | 21 +++++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/inh-ctor26.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 20c7eed3bcb..9b071ebef9e 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2017-02-19  Jason Merrill  <jason@redhat.com>
+
+	PR c++/79503 - inherited ctor taking base class
+	* call.c (add_function_candidate): Also check that
+	DECL_INHERITED_CTOR_BASE is reference-related to the parameter type.
+
 2017-02-19  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/79380
diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index 4ef444b761b..d6d3a8f61d9 100644
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -2057,7 +2057,9 @@ add_function_candidate (struct z_candidate **candidates,
     {
       tree ptype = non_reference (TREE_VALUE (parmlist));
       tree dtype = DECL_CONTEXT (fn);
-      if (reference_related_p (ptype, dtype))
+      tree btype = DECL_INHERITED_CTOR_BASE (fn);
+      if (reference_related_p (ptype, dtype)
+	  && reference_related_p (btype, ptype))
 	{
 	  viable = false;
 	  reason = inherited_ctor_rejection ();
diff --git a/gcc/testsuite/g++.dg/cpp0x/inh-ctor26.C b/gcc/testsuite/g++.dg/cpp0x/inh-ctor26.C
new file mode 100644
index 00000000000..e1e6b9e0418
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/inh-ctor26.C
@@ -0,0 +1,21 @@
+// PR c++/79503
+// { dg-do compile { target c++11 } }
+
+struct payload {};
+
+struct base: private payload {
+    base(payload) {}
+};
+
+struct derived: base {
+    using base::base;
+};
+
+int main()
+{
+    payload data;
+    // error: no matching function for call to 'derived::derived(payload&)'
+    // note: candidate: base::base(payload)
+    // note:   an inherited constructor is not a candidate for initialization from an expression of the same or derived type
+    derived demo(data);
+}
-- 
2.11.4.GIT