util reexports less std

sync/src/block_sync.rs

@@ -18,6 +18,8 @@
 /// Blockchain downloader
 ///
 
+use std::collections::{HashSet, VecDeque};
+use std::cmp;
 use util::*;
 use rlp::*;
 use ethcore::views::{BlockView};
@@ -386,7 +388,7 @@ impl BlockDownloader {
 						debug!(target: "sync", "Could not revert to previous ancient block, last: {} ({})", start, start_hash);
 						self.reset();
 					} else {
-						let n = start - min(self.retract_step, start);
+						let n = start - cmp::min(self.retract_step, start);
 						self.retract_step *= 2;
 						match io.chain().block_hash(BlockId::Number(n)) {
 							Some(h) => {