re PR c++/78649 (ICE on invalid C++ code on x86_64-linux-gnu (internal compiler…

re PR c++/78649 (ICE on invalid C++ code on x86_64-linux-gnu (internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in build_value_init_noctor, at cp/init.c:380))

	PR c++/78649
	* pt.c (tsubst_init): Don't call build_value_init if decl's type
	is error_mark_node.

	* g++.dg/cpp0x/pr78649.C: New test.

From-SVN: r243204

gcc/cp/ChangeLog

+2016-12-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/78649
+	* pt.c (tsubst_init): Don't call build_value_init if decl's type
+	is error_mark_node.
+
 2016-12-02  Cesar Philippidis  <cesar@codesourcery.com>
 	    James Norris  <jnorris@codesourcery.com>
 

gcc/cp/pt.c

@@ -14082,7 +14082,7 @@ tsubst_init (tree init, tree decl, tree args,
 
   init = tsubst_expr (init, args, complain, in_decl, false);
 
-  if (!init)
+  if (!init && TREE_TYPE (decl) != error_mark_node)
     {
       /* If we had an initializer but it
 	 instantiated to nothing,

gcc/testsuite/ChangeLog

+2016-12-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/78649
+	* g++.dg/cpp0x/pr78649.C: New test.
+
 2016-12-02  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/70322

gcc/testsuite/g++.dg/cpp0x/pr78649.C

+// PR c++/78649
+// { dg-do compile { target c++11 } }
+
+template <class> void foo ();
+template <class T, class... U>
+void
+test ()
+{
+  T t (foo<U>...);	// { dg-error "declared void" }
+}
+
+int
+main ()
+{
+  test<void> ();
+}