re PR c++/4934 (Seg fault on legal code)

        PR c++/4934
        * error.c (dump_expr) [CONVERT_EXPR]: Make sure TREE_TYPE (t) is
        set before checking it.

From-SVN: r51972

gcc/cp/ChangeLog

 2002-04-06  Jason Merrill  <jason@redhat.com>
 
+	PR c++/4934
+	* error.c (dump_expr) [CONVERT_EXPR]: Make sure TREE_TYPE (t) is
+	set before checking it.
+
 	PR c++/525
 	* init.c (build_member_call): Use build_scoped_ref.
 	(resolve_offset_ref): Likewise.

gcc/cp/error.c

@@ -1729,7 +1729,7 @@ dump_expr (t, flags)
       break;
 
     case CONVERT_EXPR:
-      if (VOID_TYPE_P (TREE_TYPE (t)))
+      if (TREE_TYPE (t) && VOID_TYPE_P (TREE_TYPE (t)))
 	{
 	  print_left_paren (scratch_buffer);
 	  dump_type (TREE_TYPE (t), flags);

gcc/testsuite/g++.dg/template/nontype1.C

+// PR c++/4934
+// dump_expr didn't know how to deal with a CONVERT_EXPR with no type.
+
+template<unsigned>   struct A {};
+template<typename T> struct B { A<sizeof(+int())> a; };