From 6c3c621de09a62c7ec8d89b2d8e6a9d73833fd0b Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Tue, 20 Oct 2020 12:36:16 +0100
Subject: [PATCH] Remove invalid state delta check (#1550)

---
 roomserver/internal/input/input_latest_events.go | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/roomserver/internal/input/input_latest_events.go b/roomserver/internal/input/input_latest_events.go
index f76b0a0b..5631959b 100644
--- a/roomserver/internal/input/input_latest_events.go
+++ b/roomserver/internal/input/input_latest_events.go
@@ -233,18 +233,6 @@ func (u *latestEventsUpdater) latestState() error {
 	if err != nil {
 		return fmt.Errorf("roomState.DifferenceBetweenStateSnapshots: %w", err)
 	}
-	if !u.stateAtEvent.Overwrite && len(u.removed) > len(u.added) {
-		// This really shouldn't happen.
-		// TODO: What is ultimately the best way to handle this situation?
-		logrus.Errorf(
-			"Invalid state delta on event %q wants to remove %d state but only add %d state (between state snapshots %d and %d)",
-			u.event.EventID(), len(u.removed), len(u.added), u.oldStateNID, u.newStateNID,
-		)
-		u.added = u.added[:0]
-		u.removed = u.removed[:0]
-		u.newStateNID = u.oldStateNID
-		return nil
-	}
 
 	// Also work out the state before the event removes and the event
 	// adds.