From e64dd2d206360cf5843b9013d9181865ed51c3ff Mon Sep 17 00:00:00 2001
From: John Regan <john@jrjrtech.com>
Date: Fri, 11 Nov 2022 14:13:55 -0500
Subject: [PATCH] activitypub: ensure Undo request has valid type (#2317)

---
 activitypub/inbox/undo.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/activitypub/inbox/undo.go b/activitypub/inbox/undo.go
index 3034951a8..fd18fc6bb 100644
--- a/activitypub/inbox/undo.go
+++ b/activitypub/inbox/undo.go
@@ -18,7 +18,12 @@ func handleUndoInboxRequest(c context.Context, activity vocab.ActivityStreamsUnd
 				return err
 			}
 		} else {
-			log.Traceln("Undo", iter.GetType().GetTypeName(), "ignored")
+			t := iter.GetType()
+			if t != nil {
+				log.Traceln("Undo", t.GetTypeName(), "ignored")
+			} else {
+				log.Traceln("Undo (no type) ignored")
+			}
 			return nil
 		}
 	}