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Fix a division by zero in light client RPC handler (#7917)

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Pierre Krieger 2018-02-17 21:54:39 +01:00 committed by Marek Kotewicz
parent f905a1676f
commit 364a1fa5a8
1 changed files with 2 additions and 1 deletions
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3
ethcore/light/src/on_demand/mod.rs
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@ -18,6 +18,7 @@
//! The request service is implemented using Futures. Higher level request handlers
//! will take the raw data received here and extract meaningful results from it.
use std::cmp;
use std::collections::HashMap;
use std::marker::PhantomData;
use std::sync::Arc;
@ -366,7 +367,7 @@ impl OnDemand {
.filter_map(|pending| {
// the peer we dispatch to is chosen randomly
let num_peers = peers.len();
let rng = rand::random::<usize>() % num_peers;
let rng = rand::random::<usize>() % cmp::max(num_peers, 1);
for (peer_id, peer) in peers.iter().chain(peers.iter()).skip(rng).take(num_peers) {
// TODO: see which requests can be answered by the cache?