node.c: Show the ID of internal variable

1 files changed, 1 insertions, 1 deletions

diff --git a/node.c b/node.c
index 65c6837303..d2bf9bf150 100644
--- a/node.c
+++ b/node.c
@@ -92,7 +92,7 @@ add_id(VALUE buf, ID id)
 	    A(":"); AR(str);
 	}
 	else {
-	    A("(internal variable)");
+	    rb_str_catf(buf, "(internal variable: 0x%"PRIsVALUE")", id);
 	}
     }
 }