From 1d868763f85e36b4dea1fe53968d57f51df40a2f Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Tue, 8 Dec 2020 15:57:18 +0000
Subject: [PATCH] Fix deadlock

---
 federationsender/queue/destinationqueue.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/federationsender/queue/destinationqueue.go b/federationsender/queue/destinationqueue.go
index 237e50829..31eeaebc5 100644
--- a/federationsender/queue/destinationqueue.go
+++ b/federationsender/queue/destinationqueue.go
@@ -287,7 +287,7 @@ func (oq *destinationQueue) backgroundSend() {
 			}
 			oq.pendingPDUs = nil
 			oq.pendingEDUs = nil
-			oq.pendingMutex.Lock()
+			oq.pendingMutex.Unlock()
 			return
 		}
 		if until != nil && until.After(time.Now()) {