From 6091c024f1d63cd6645a69a66702d92167a3645d Mon Sep 17 00:00:00 2001
From: =?utf8?q?Petr=20=C5=A0pa=C4=8Dek?= <petr.spacek@nic.cz>
Date: Tue, 31 Mar 2020 14:33:00 +0200
Subject: [PATCH] daf: fix consensus() function to correctly detect empty
 answers

consensus() function is affected by
https://gitlab.labs.nic.cz/knot/knot-resolver/issues/554
so this fix helps only with single-instance scenarios.
---
 modules/daf/daf.lua | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/modules/daf/daf.lua b/modules/daf/daf.lua
index 9b6696eeb..94d0a49d0 100644
--- a/modules/daf/daf.lua
+++ b/modules/daf/daf.lua
@@ -214,9 +214,13 @@ function M.enable(id)
 end
 
 local function consensus(op, ...)
-	local ret = true
+	local ret = false
 	local results = map(string.format(op, ...))
-	for _, r in ipairs(results) do
+	for idx, r in ipairs(results) do
+		if idx == 1 then
+			-- non-empty table, init to true
+			ret = true
+		end
 		ret = ret and r
 	end
 	return ret
-- 
2.47.2