From 1062a885a9a8ebdbcac3a9e768b8f2ab87099962 Mon Sep 17 00:00:00 2001
From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Wed, 19 Jul 2017 23:11:12 +0300
Subject: [PATCH] lib-storage: mailbox_watch_extract_notify_fd() - give better
 reason if mailbox has no IOs

This happens currently with virtual mailboxes.
---
 src/lib-storage/mailbox-watch.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lib-storage/mailbox-watch.c b/src/lib-storage/mailbox-watch.c
index a035f6e216..19f23c7dc7 100644
--- a/src/lib-storage/mailbox-watch.c
+++ b/src/lib-storage/mailbox-watch.c
@@ -140,7 +140,10 @@ int mailbox_watch_extract_notify_fd(struct mailbox *box, const char **reason_r)
 	}
 	if (failed)
 		ret = -1;
-	else {
+	else if (array_count(&temp_ios) == 0) {
+		*reason_r = "Mailbox has no IO notifications";
+		ret = -1;
+	} else {
 		ret = io_loop_extract_notify_fd(ioloop);
 		if (ret == -1)
 			*reason_r = "Couldn't extra notify fd";