From 15d6614a167abb8191fa844ca140b53f8e0dfd40 Mon Sep 17 00:00:00 2001
From: Patrick Palka <ppalka@gcc.gnu.org>
Date: Mon, 13 Jul 2015 20:35:53 +0000
Subject: [PATCH] re PR c++/65186 (internal compiler error: in tsubst, at
 cp/pt.c:11738)

Fix PR c++/65186

gcc/cp/ChangeLog:
	PR c++/65186
	* pt.c (invalid_nontype_parm_type_p): Accept a bound template
	template parm type under C++11 and later.

gcc/testsuite/ChangeLog:

	PR c++/65186
	* g++.dg/template/pr65186.C: New test.

From-SVN: r225749
---
 gcc/cp/ChangeLog                        |  6 ++++++
 gcc/cp/pt.c                             |  5 +++++
 gcc/testsuite/ChangeLog                 |  5 +++++
 gcc/testsuite/g++.dg/template/pr65186.C | 26 +++++++++++++++++++++++++
 4 files changed, 42 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/template/pr65186.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index a33b6491876..df2e0b2fabf 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2015-07-13  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/65186
+	* pt.c (invalid_nontype_parm_type_p): Accept a bound template
+	template parm type under C++11 and later.
+
 2015-07-12  Aldy Hernandez  <aldyh@redhat.com>
 
 	* call.c: Fix double word typos.
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 064cbfdc4ec..2097963ed69 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -20996,6 +20996,11 @@ invalid_nontype_parm_type_p (tree type, tsubst_flags_t complain)
     return 0;
   else if (TREE_CODE (type) == NULLPTR_TYPE)
     return 0;
+  /* A bound template template parm could later be instantiated to have a valid
+     nontype parm type via an alias template.  */
+  else if (cxx_dialect >= cxx11
+	   && TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
+    return 0;
 
   if (complain & tf_error)
     {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 071e7c4e08f..2e32e14527e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-07-13  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/65186
+	* g++.dg/template/pr65186.C: New test.
+
 2015-07-13  Mantas Mikaitis  <mantas.mikaitis@arm.com>
 
 	* gcc.target/arm/macro_defs0.c: Add directive to skip
diff --git a/gcc/testsuite/g++.dg/template/pr65186.C b/gcc/testsuite/g++.dg/template/pr65186.C
new file mode 100644
index 00000000000..f5e81e37eba
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/pr65186.C
@@ -0,0 +1,26 @@
+// { dg-do compile { target c++11 } }
+// PR c++/65186
+
+template<typename A, A x, A y>
+using Id = int;
+
+template<
+  typename A,
+  A x,
+  A y,
+  Id<A, x, y> p,
+  template<A a, A b, Id<A, a, b>> class C,
+  C<x, x, x> // { dg-bogus "not a valid type" }
+> using J = C<x, y, p>;
+
+
+template<class A>
+using Z = A;
+
+template<
+  template <class> class A,
+  A<int> B // { dg-bogus "not a valid type" }
+>
+struct C { };
+
+C<Z, 5> a;
-- 
2.30.2