From 31abd31d8a119e08d4c20a19d5a0e04a03624a07 Mon Sep 17 00:00:00 2001
From: Zahary Karadjov <zahary@gmail.com>
Date: Thu, 7 Feb 2019 16:58:39 +0100
Subject: [PATCH] Fix an int conversion issue

---
 beacon_chain/spec/validator.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index 755c05881..bc699101f 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -128,4 +128,5 @@ func get_beacon_proposer_index*(state: BeaconState, slot: uint64): ValidatorInde
   #      because presently, `state.slot += 1` happens before this function
   #      is called - see also testutil.getNextBeaconProposerIndex
   let (first_committee, _) = get_crosslink_committees_at_slot(state, slot)[0]
-  first_committee[slot.int mod len(first_committee)]
+  let idx = int(slot mod SlotNumber(first_committee.len))
+  first_committee[idx]