Fix leading zeroes bugs (#3763)

* remove two unneeded mut's

* ensure correct size for leading_zeros()

config/src/config.rs

@@ -161,7 +161,7 @@ impl GlobalConfig {
 	/// apply defaults for each chain type
 	pub fn for_chain(chain_type: &global::ChainTypes) -> GlobalConfig {
 		let mut defaults_conf = GlobalConfig::default();
-		let mut defaults = &mut defaults_conf.members.as_mut().unwrap().server;
+		let defaults = &mut defaults_conf.members.as_mut().unwrap().server;
 		defaults.chain_type = chain_type.clone();
 
 		match *chain_type {

core/src/pow/cuckaroo.rs

@@ -70,7 +70,7 @@ impl PoWContext for CuckarooContext {
 		let mut uvs = vec![0u64; 2 * size];
 		let mut xor0: u64 = 0;
 		let mut xor1: u64 = 0;
-		let mask = u64::MAX >> size.leading_zeros(); // round size up to 2-power - 1
+		let mask = u64::MAX >> (size as u64).leading_zeros(); // round size up to 2-power - 1
 													  // the next three arrays form a linked list of nodes with matching bits 6..1
 		let mut headu = vec![2 * size; 1 + mask as usize];
 		let mut headv = vec![2 * size; 1 + mask as usize];

core/src/pow/cuckarood.rs

@@ -65,7 +65,7 @@ impl PoWContext for CuckaroodContext {
 		let mut ndir = vec![0usize; 2];
 		let mut xor0: u64 = 0;
 		let mut xor1: u64 = 0;
-		let mask = u64::MAX >> size.leading_zeros(); // round size up to 2-power - 1
+		let mask = u64::MAX >> (size as u64).leading_zeros(); // round size up to 2-power - 1
 													  // the next two arrays form a linked list of nodes with matching bits 4..0|dir
 		let mut headu = vec![2 * size; 1 + mask as usize];
 		let mut headv = vec![2 * size; 1 + mask as usize];

core/src/pow/cuckaroom.rs

@@ -64,7 +64,7 @@ impl PoWContext for CuckaroomContext {
 		let mut to = vec![0u64; size];
 		let mut xor_from: u64 = 0;
 		let mut xor_to: u64 = 0;
-		let mask = u64::MAX >> size.leading_zeros(); // round size up to 2-power - 1
+		let mask = u64::MAX >> (size as u64).leading_zeros(); // round size up to 2-power - 1
 													  // the next two arrays form a linked list of nodes with matching bits 6..1
 		let mut head = vec![size; 1 + mask as usize];
 		let mut prev = vec![0usize; size];

core/src/pow/cuckarooz.rs

@@ -63,7 +63,7 @@ impl PoWContext for CuckaroozContext {
 		let nonces = &proof.nonces;
 		let mut uvs = vec![0u64; 2 * size];
 		let mut xoruv: u64 = 0;
-		let mask = u64::MAX >> size.leading_zeros(); // round size up to 2-power - 1
+		let mask = u64::MAX >> (size as u64).leading_zeros(); // round size up to 2-power - 1
 													  // the next two arrays form a linked list of nodes with matching bits 6..1
 		let mut head = vec![2 * size; 1 + mask as usize];
 		let mut prev = vec![0usize; 2 * size];

core/src/pow/cuckatoo.rs

@@ -261,7 +261,7 @@ impl CuckatooContext {
 		}
 		let nonces = &proof.nonces;
 		let mut uvs = vec![0u64; 2 * size];
-		let mask = u64::MAX >> size.leading_zeros(); // round size up to 2-power - 1
+		let mask = u64::MAX >> (size as u64).leading_zeros(); // round size up to 2-power - 1
 		let mut xor0: u64 = (size as u64 / 2) & 1;
 		let mut xor1: u64 = xor0;
 		// the next two arrays form a linked list of nodes with matching bits 6..1

servers/src/mining/stratumserver.rs

@@ -729,7 +729,7 @@ impl WorkersList {
 
 	pub fn login(&self, worker_id: usize, login: String, agent: String) -> Result<(), RpcError> {
 		let mut wl = self.workers_list.write();
-		let mut worker = wl
+		let worker = wl
 			.get_mut(&worker_id)
 			.ok_or_else(RpcError::internal_error)?;
 		worker.login = Some(login);