re PR c++/89391 (ICE in build_target_expr_with_type, at cp/tree.c:795)

	PR c++/89391
	* typeck.c (build_reinterpret_cast_1): Don't handle void to
	&& conversion go through build_target_expr_with_type.

	* g++.dg/cpp0x/reinterpret_cast2.C: New test.

From-SVN: r269008

gcc/cp/ChangeLog

 2019-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/89391
+	* typeck.c (build_reinterpret_cast_1): Don't handle void to
+	&& conversion go through build_target_expr_with_type.
+
 	PR c++/89390
 	* error.c (qualified_name_lookup_error): Only call
 	suggest_alternative_in_scoped_enum if name is IDENTIFIER_NODE.

gcc/cp/typeck.c

@@ -7477,7 +7477,7 @@ build_reinterpret_cast_1 (tree type, tree expr, bool c_cast_p,
      reinterpret_cast.  */
   if (TYPE_REF_P (type))
     {
-      if (TYPE_REF_IS_RVALUE (type))
+      if (TYPE_REF_IS_RVALUE (type) && !VOID_TYPE_P (intype))
 	{
 	  if (!obvalue_p (expr))
 	    /* Perform the temporary materialization conversion.  */

gcc/testsuite/ChangeLog

 2019-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/89391
+	* g++.dg/cpp0x/reinterpret_cast2.C: New test.
+
 	PR c++/89390
 	* g++.dg/diagnostic/pr89390.C: New test.
 

gcc/testsuite/g++.dg/cpp0x/reinterpret_cast2.C

+// PR c++/89391
+// { dg-do compile { target c++11 } }
+
+struct S { };
+
+void
+foo ()
+{
+  auto a = reinterpret_cast<S&&>(foo ());	// { dg-error "invalid cast of an rvalue expression of type 'void' to type" }
+}