From 45fa4750dae0201782fff9782ad8a048928d9e4c Mon Sep 17 00:00:00 2001
From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Fri, 18 Aug 2017 17:43:02 +0200
Subject: [PATCH] reference: don't update fallback drift on manual input

This fixes a crash due to assertion failure in update_fb_drifts() when
fallbackdrift is enabled and manual input is provided.
---
 reference.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reference.c b/reference.c
index 4cf8809..b49d4c7 100644
--- a/reference.c
+++ b/reference.c
@@ -1076,7 +1076,7 @@ REF_SetReference(int stratum,
   }
 
   /* Update fallback drifts */
-  if (fb_drifts) {
+  if (fb_drifts && are_we_synchronised) {
     update_fb_drifts(abs_freq_ppm, update_interval);
     schedule_fb_drift(&now);
   }