PR c++/83714 - ICE checking return in template.

	* typeck.c (check_return_expr): Call build_non_dependent_expr.

From-SVN: r256765

gcc/cp/ChangeLog

+2018-01-16  Jason Merrill  <jason@redhat.com>
+
+	PR c++/83714 - ICE checking return in template.
+	* typeck.c (check_return_expr): Call build_non_dependent_expr.
+
 2018-01-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/83817

gcc/cp/typeck.c

@@ -9333,6 +9333,9 @@ check_return_expr (tree retval, bool *no_warning)
 	 to undo it so we can try to treat it as an rvalue below.  */
       retval = maybe_undo_parenthesized_ref (retval);
 
+      if (processing_template_decl)
+	retval = build_non_dependent_expr (retval);
+
       /* Under C++11 [12.8/32 class.copy], a returned lvalue is sometimes
 	 treated as an rvalue for the purposes of overload resolution to
 	 favor move constructors over copy constructors.

gcc/testsuite/g++.dg/cpp0x/alias-decl-61.C

+// PR c++/83714
+// { dg-do compile { target c++11 } }
+
+class a {
+  typedef int b;
+  operator b();
+};
+struct c {
+  using d = a;
+};
+using e = c;
+
+template <class T>
+e f(T) {
+  return e::d {};		// { dg-error "could not convert" }
+}