From e7eaa7945dab226239d0011ae7ccee9ec366094b Mon Sep 17 00:00:00 2001
From: Matthew Chen <matthew@signal.org>
Date: Fri, 4 May 2018 10:52:22 -0400
Subject: [PATCH] Handle completely skipped message sends.

---
 SignalServiceKit/src/Messages/OWSMessageSender.m | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/SignalServiceKit/src/Messages/OWSMessageSender.m b/SignalServiceKit/src/Messages/OWSMessageSender.m
index 5d57b862b..4e0ec2275 100644
--- a/SignalServiceKit/src/Messages/OWSMessageSender.m
+++ b/SignalServiceKit/src/Messages/OWSMessageSender.m
@@ -501,6 +501,12 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
                 }];
             }
 
+            if (sendingRecipientIds.count < 1) {
+                // All recipients are already sent or can be skipped.
+                successHandler();
+                return;
+            }
+
             NSError *error;
             NSArray<SignalRecipient *> *recipients =
                 [self getRecipientsForRecipientIds:sendingRecipientIds.allObjects error:&error];