error.c: ArgumentError if no receiver

* error.c (name_err_receiver): raise ArgumentError if no receiver
  is available on this exception object.  [Feature #10881]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51002 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/error.c b/error.c
index b668375a55..70ebe6bb67 100644
--- a/error.c
+++ b/error.c
@@ -1264,7 +1264,10 @@ name_err_receiver(VALUE self)
 {
     VALUE *ptr, mesg = rb_attr_get(self, id_mesg);
 
-    TypedData_Get_Struct(mesg, VALUE, &name_err_mesg_data_type, ptr);
+    if (!rb_typeddata_is_kind_of(mesg, &name_err_mesg_data_type)) {
+	rb_raise(rb_eArgError, "no receiver is available");
+    }
+    ptr = DATA_PTR(mesg);
     return ptr[NAME_ERR_MESG__RECV];
 }