Fixing clippy warnings. When building on nightly it is required to enable clippy

Cargo.lock

@@ -16,6 +16,7 @@ dependencies = [
  "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "number_prefix 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -209,6 +210,7 @@ dependencies = [
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -232,6 +234,7 @@ dependencies = [
  "jsonrpc-http-server 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_codegen 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -286,6 +289,7 @@ dependencies = [
  "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 

Cargo.toml

@@ -4,6 +4,10 @@ name = "parity"
 version = "0.9.99"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io>"]
+build = "build.rs"
+
+[build-dependencies]
+rustc_version = "0.1"
 
 [dependencies]
 log = "0.3"
@@ -24,17 +28,18 @@ ethcore-devtools = { path = "devtools" }
 ethcore-rpc = { path = "rpc", optional = true }
 
 [dev-dependencies]
-ethcore = { path = "ethcore", features = ["dev"]}
+ethcore = { path = "ethcore", features = ["dev"] }
 ethcore-util = { path = "util", features = ["dev"] }
 ethsync = { path = "sync", features = ["dev"] }
-ethcore-rpc = { path = "rpc", features = ["dev"]}
+ethcore-rpc = { path = "rpc", features = ["dev"] }
 
 [features]
 default = ["rpc"]
 rpc = ["ethcore-rpc"]
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev"]
+dev = ["ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev"]
+dev-clippy = ["clippy", "ethcore/clippy", "ethcore-util/clippy", "ethsync/clippy", "ethcore-rpc/clippy"]
 travis-beta = ["ethcore/json-tests"]
-travis-nightly = ["ethcore/json-tests", "dev"]
+travis-nightly = ["ethcore/json-tests", "clippy", "dev"]
 
 [[bin]]
 path = "parity/main.rs"

build.rs

@@ -0,0 +1,25 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate rustc_version;
+
+use rustc_version::{version_meta, Channel};
+
+fn main() {
+	if let Channel::Nightly = version_meta().channel {
+		println!("cargo:rustc-cfg=nightly");
+	}
+}

cargo.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+cargo "$@" --features dev-clippy

ethcore/Cargo.toml

@@ -5,6 +5,10 @@ license = "GPL-3.0"
 name = "ethcore"
 version = "0.9.99"
 authors = ["Ethcore <admin@ethcore.io>"]
+build = "build.rs"
+
+[build-dependencies]
+rustc_version = "0.1"
 
 [dependencies]
 log = "0.3"
@@ -27,5 +31,5 @@ jit = ["evmjit"]
 evm-debug = []
 json-tests = []
 test-heavy = []
-dev = ["clippy"]
+dev = []
 default = []

ethcore/build.rs

@@ -0,0 +1,25 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate rustc_version;
+
+use rustc_version::{version_meta, Channel};
+
+fn main() {
+	if let Channel::Nightly = version_meta().channel {
+		println!("cargo:rustc-cfg=nightly");
+	}
+}

ethcore/src/basic_types.rs

@@ -24,7 +24,7 @@ pub type LogBloom = H2048;
 /// Constant 2048-bit datum for 0. Often used as a default.
 pub static ZERO_LOGBLOOM: LogBloom = H2048([0x00; 256]);
 
-#[cfg_attr(feature="dev", allow(enum_variant_names))]
+#[cfg_attr(all(nightly, feature="dev"), allow(enum_variant_names))]
 /// Semantic boolean for when a seal/signature is included.
 pub enum Seal {
 	/// The seal/signature is included.

ethcore/src/block.rs

@@ -16,7 +16,7 @@
 
 //! Blockchain block.
 
-#![cfg_attr(feature="dev", allow(ptr_arg))] // Because of &LastHashes -> &Vec<_>
+#![cfg_attr(all(nightly, feature="dev"), allow(ptr_arg))] // Because of &LastHashes -> &Vec<_>
 
 use common::*;
 use engine::*;
@@ -274,7 +274,7 @@ impl<'x> OpenBlock<'x> {
 		s.block.base.header.note_dirty();
 
 		ClosedBlock {
-			block: s.block, 
+			block: s.block,
 			uncle_bytes: uncle_bytes,
 		}
 	}

ethcore/src/block_queue.rs

@@ -121,7 +121,7 @@ struct QueueSignal {
 }
 
 impl QueueSignal {
-	#[cfg_attr(feature="dev", allow(bool_comparison))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(bool_comparison))]
 	fn set(&self) {
 		if self.signalled.compare_and_swap(false, true, AtomicOrdering::Relaxed) == false {
 			self.message_channel.send(UserMessage(SyncMessage::BlockVerified)).expect("Error sending BlockVerified message");
@@ -385,7 +385,7 @@ impl BlockQueue {
 		}
 	}
 
-	pub fn collect_garbage(&self) { 
+	pub fn collect_garbage(&self) {
 		{
 			let mut verification = self.verification.lock().unwrap();
 			verification.unverified.shrink_to_fit();

ethcore/src/blockchain/blockchain.rs

@@ -884,7 +884,7 @@ mod tests {
 	}
 
 	#[test]
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	fn test_find_uncles() {
 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();
@@ -922,7 +922,7 @@ mod tests {
 	}
 
 	#[test]
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	fn test_small_fork() {
 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();

ethcore/src/ethereum/ethash.rs

@@ -202,7 +202,7 @@ impl Engine for Ethash {
 	}
 }
 
-#[cfg_attr(feature="dev", allow(wrong_self_convention))] // to_ethash should take self
+#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))] // to_ethash should take self
 impl Ethash {
 	fn calculate_difficuty(&self, header: &Header, parent: &Header) -> U256 {
 		const EXP_DIFF_PERIOD: u64 = 100000;

ethcore/src/evm/interpreter.rs

@@ -243,7 +243,7 @@ struct CodeReader<'a> {
 	code: &'a Bytes
 }
 
-#[cfg_attr(feature="dev", allow(len_without_is_empty))]
+#[cfg_attr(all(nightly, feature="dev"), allow(len_without_is_empty))]
 impl<'a> CodeReader<'a> {
 	/// Get `no_of_bytes` from code and convert to U256. Move PC
 	fn read(&mut self, no_of_bytes: usize) -> U256 {
@@ -258,7 +258,7 @@ impl<'a> CodeReader<'a> {
 	}
 }
 
-#[cfg_attr(feature="dev", allow(enum_variant_names))]
+#[cfg_attr(all(nightly, feature="dev"), allow(enum_variant_names))]
 enum InstructionCost {
 	Gas(U256),
 	GasMem(U256, U256),
@@ -347,7 +347,7 @@ impl evm::Evm for Interpreter {
 }
 
 impl Interpreter {
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	fn get_gas_cost_mem(&self,
 						ext: &evm::Ext,
 						instruction: Instruction,

ethcore/src/evm/tests.rs

@@ -25,9 +25,8 @@ struct FakeLogEntry {
 }
 
 #[derive(PartialEq, Eq, Hash, Debug)]
-#[cfg_attr(feature="dev", allow(enum_variant_names))] // Common prefix is C ;)
 enum FakeCallType {
-	CALL, CREATE
+	Call, Create
 }
 
 #[derive(PartialEq, Eq, Hash, Debug)]
@@ -94,7 +93,7 @@ impl Ext for FakeExt {
 
 	fn create(&mut self, gas: &U256, value: &U256, code: &[u8]) -> ContractCreateResult {
 		self.calls.insert(FakeCall {
-			call_type: FakeCallType::CREATE,
+			call_type: FakeCallType::Create,
 			gas: *gas,
 			sender_address: None,
 			receive_address: None,
@@ -115,7 +114,7 @@ impl Ext for FakeExt {
 			_output: &mut [u8]) -> MessageCallResult {
 
 		self.calls.insert(FakeCall {
-			call_type: FakeCallType::CALL,
+			call_type: FakeCallType::Call,
 			gas: *gas,
 			sender_address: Some(sender_address.clone()),
 			receive_address: Some(receive_address.clone()),
@@ -909,7 +908,7 @@ fn test_calls(factory: super::Factory) {
 	};
 
 	assert_set_contains(&ext.calls, &FakeCall {
-		call_type: FakeCallType::CALL,
+		call_type: FakeCallType::Call,
 		gas: U256::from(2556),
 		sender_address: Some(address.clone()),
 		receive_address: Some(code_address.clone()),
@@ -918,7 +917,7 @@ fn test_calls(factory: super::Factory) {
 		code_address: Some(code_address.clone())
 	});
 	assert_set_contains(&ext.calls, &FakeCall {
-		call_type: FakeCallType::CALL,
+		call_type: FakeCallType::Call,
 		gas: U256::from(2556),
 		sender_address: Some(address.clone()),
 		receive_address: Some(address.clone()),

ethcore/src/externalities.rs

@@ -188,7 +188,7 @@ impl<'a> Ext for Externalities<'a> {
 		self.state.code(address).unwrap_or_else(|| vec![])
 	}
 
-	#[cfg_attr(feature="dev", allow(match_ref_pats))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(match_ref_pats))]
 	fn ret(&mut self, gas: &U256, data: &[u8]) -> Result<U256, evm::Error> {
 		match &mut self.output {
 			&mut OutputPolicy::Return(BytesRef::Fixed(ref mut slice)) => unsafe {
@@ -226,9 +226,9 @@ impl<'a> Ext for Externalities<'a> {
 
 	fn log(&mut self, topics: Vec<H256>, data: &[u8]) {
 		let address = self.origin_info.address.clone();
-		self.substate.logs.push(LogEntry { 
+		self.substate.logs.push(LogEntry {
 			address: address,
-			topics: topics, 
+			topics: topics,
 			data: data.to_vec()
 		});
 	}

ethcore/src/lib.rs

@@ -15,16 +15,16 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 #![warn(missing_docs)]
-#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(feature="dev", plugin(clippy))]
+#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
 
 // Clippy config
 // TODO [todr] not really sure
-#![cfg_attr(feature="dev", allow(needless_range_loop))]
+#![cfg_attr(all(nightly, feature="dev"), allow(needless_range_loop))]
 // Shorter than if-else
-#![cfg_attr(feature="dev", allow(match_bool))]
+#![cfg_attr(all(nightly, feature="dev"), allow(match_bool))]
 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(feature="dev", allow(clone_on_copy))]
+#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
 
 //! Ethcore library
 //!

ethcore/src/service.rs

@@ -115,12 +115,11 @@ impl IoHandler<NetSyncMessage> for ClientIoHandler {
 		}
 	}
 
-	#[cfg_attr(feature="dev", allow(match_ref_pats))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(single_match))]
-	#[cfg_attr(feature="dev", allow(single_match))]
 	fn message(&self, io: &IoContext<NetSyncMessage>, net_message: &NetSyncMessage) {
-		if let &UserMessage(ref message) = net_message {
+		if let UserMessage(ref message) = *net_message {
-			match message {
+			match *message {
-				&SyncMessage::BlockVerified => {
+				SyncMessage::BlockVerified => {
 					self.client.import_verified_blocks(&io.channel());
 				},
 				_ => {}, // ignore other messages

ethcore/src/spec.rs

@@ -99,7 +99,7 @@ pub struct Spec {
 	genesis_state: PodState,
 }
 
-#[cfg_attr(feature="dev", allow(wrong_self_convention))] // because to_engine(self) should be to_engine(&self)
+#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))] // because to_engine(self) should be to_engine(&self)
 impl Spec {
 	/// Convert this object into a boxed Engine of the right underlying type.
 	// TODO avoid this hard-coded nastiness - use dynamic-linked plugin framework instead.
@@ -136,7 +136,7 @@ impl Spec {
 			uncles_hash: RlpStream::new_list(0).out().sha3(),
 			extra_data: self.extra_data.clone(),
 			state_root: self.state_root().clone(),
-			receipts_root: self.receipts_root.clone(),	
+			receipts_root: self.receipts_root.clone(),
 			log_bloom: H2048::new().clone(),
 			gas_used: self.gas_used.clone(),
 			gas_limit: self.gas_limit.clone(),
@@ -182,7 +182,7 @@ impl Spec {
 				)
 			}
 		};
-		
+
 		self.parent_hash = H256::from_json(&genesis["parentHash"]);
 		self.transactions_root = genesis.find("transactionsTrie").and_then(|_| Some(H256::from_json(&genesis["transactionsTrie"]))).unwrap_or(SHA3_NULL_RLP.clone());
 		self.receipts_root = genesis.find("receiptTrie").and_then(|_| Some(H256::from_json(&genesis["receiptTrie"]))).unwrap_or(SHA3_NULL_RLP.clone());
@@ -249,7 +249,7 @@ impl FromJson for Spec {
 				)
 			}
 		};
-		
+
 		Spec {
 			name: json.find("name").map_or("unknown", |j| j.as_string().unwrap()).to_owned(),
 			engine_name: json["engineName"].as_string().unwrap().to_owned(),
@@ -278,7 +278,7 @@ impl Spec {
 	/// Ensure that the given state DB has the trie nodes in for the genesis state.
 	pub fn ensure_db_good(&self, db: &mut HashDB) -> bool {
 		if !db.contains(&self.state_root()) {
-			let mut root = H256::new(); 
+			let mut root = H256::new();
 			{
 				let mut t = SecTrieDBMut::new(db, &mut root);
 				for (address, account) in self.genesis_state.get().iter() {

ethcore/src/state.rs

@@ -224,7 +224,7 @@ impl State {
 
 	/// Commit accounts to SecTrieDBMut. This is similar to cpp-ethereum's dev::eth::commit.
 	/// `accounts` is mutable because we may need to commit the code or storage and record that.
-	#[cfg_attr(feature="dev", allow(match_ref_pats))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(match_ref_pats))]
 	pub fn commit_into(db: &mut HashDB, root: &mut H256, accounts: &mut HashMap<Address, Option<Account>>) {
 		// first, commit the sub trees.
 		// TODO: is this necessary or can we dispense with the `ref mut a` for just `a`?

ethcore/src/transaction.rs

@@ -80,7 +80,7 @@ impl Transaction {
 }
 
 impl FromJson for SignedTransaction {
-	#[cfg_attr(feature="dev", allow(single_char_pattern))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(single_char_pattern))]
 	fn from_json(json: &Json) -> SignedTransaction {
 		let t = Transaction {
 			nonce: xjson!(&json["nonce"]),

ethcore/src/verification/mod.rs

@@ -17,9 +17,11 @@
 pub mod verification;
 pub mod verifier;
 mod canon_verifier;
+#[cfg(test)]
 mod noop_verifier;
 
 pub use self::verification::*;
 pub use self::verifier::Verifier;
 pub use self::canon_verifier::CanonVerifier;
+#[cfg(test)]
 pub use self::noop_verifier::NoopVerifier;

hook.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-echo "#!/bin/sh\ncargo test -p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity --features dev" > ./.git/hooks/pre-push
+echo "#!/bin/sh\ncargo test -p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity --features dev-clippy" > ./.git/hooks/pre-push
 chmod +x ./.git/hooks/pre-push

parity/main.rs

@@ -17,8 +17,8 @@
 //! Ethcore client application.
 
 #![warn(missing_docs)]
-#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(feature="dev", plugin(clippy))]
+#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
 extern crate docopt;
 extern crate rustc_serialize;
 extern crate ethcore_util as util;
@@ -246,7 +246,7 @@ impl Configuration {
 		}
 	}
 
-	#[cfg_attr(feature="dev", allow(useless_format))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(useless_format))]
 	fn net_addresses(&self) -> (Option<SocketAddr>, Option<SocketAddr>) {
 		let mut listen_address = None;
 		let mut public_address = None;

rpc/Cargo.toml

@@ -26,8 +26,9 @@ serde_macros = { version = "0.7.0", optional = true }
 [build-dependencies]
 serde_codegen = { version = "0.7.0", optional = true }
 syntex = "0.29.0"
+rustc_version = "0.1"
 
 [features]
 default = ["serde_codegen"]
 nightly = ["serde_macros"]
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev"]
+dev = ["ethcore/dev", "ethcore-util/dev", "ethsync/dev"]

rpc/build.rs

@@ -1,3 +1,23 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate rustc_version;
+
+use rustc_version::{version_meta, Channel};
+
 #[cfg(not(feature = "serde_macros"))]
 mod inner {
     extern crate syntex;
@@ -26,4 +46,7 @@ mod inner {
 
 fn main() {
     inner::main();
+	if let Channel::Nightly = version_meta().channel {
+		println!("cargo:rustc-cfg=nightly");
+	}
 }

sync/Cargo.toml

@@ -4,9 +4,13 @@ name = "ethsync"
 version = "0.9.99"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io"]
+build = "build.rs"
 
 [lib]
 
+[build-dependencies]
+rustc_version = "0.1"
+
 [dependencies]
 ethcore-util = { path = "../util" }
 ethcore = { path = "../ethcore" }
@@ -20,4 +24,4 @@ rustc-serialize = "0.3"
 
 [features]
 default = []
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev"]
+dev = ["ethcore/dev", "ethcore-util/dev"]

sync/build.rs

@@ -0,0 +1,25 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate rustc_version;
+
+use rustc_version::{version_meta, Channel};
+
+fn main() {
+	if let Channel::Nightly = version_meta().channel {
+		println!("cargo:rustc-cfg=nightly");
+	}
+}

sync/src/chain.rs

@@ -268,7 +268,7 @@ impl ChainSync {
 	}
 
 
-	#[cfg_attr(feature="dev", allow(for_kv_map))] // Because it's not possible to get `values_mut()`
+	#[cfg_attr(all(nightly, feature="dev"), allow(for_kv_map))] // Because it's not possible to get `values_mut()`
 	/// Rest sync. Clear all downloaded data but keep the queue
 	fn reset(&mut self) {
 		self.downloading_headers.clear();
@@ -335,7 +335,7 @@ impl ChainSync {
 		Ok(())
 	}
 
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	/// Called by peer once it has new block headers during sync
 	fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
 		self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders);
@@ -462,6 +462,7 @@ impl ChainSync {
 	}
 
 	/// Called by peer once it has new block bodies
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	fn on_peer_new_block(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
 		let block_rlp = try!(r.at(0));
 		let header_rlp = try!(block_rlp.at(0));
@@ -484,7 +485,7 @@ impl ChainSync {
 					trace!(target: "sync", "New block already queued {:?}", h);
 				},
 				Ok(_) => {
-					if self.current_base_block() < header.number { 
+					if self.current_base_block() < header.number {
 						self.last_imported_block = Some(header.number);
 						self.remove_downloaded_blocks(header.number);
 					}

sync/src/lib.rs

@@ -15,11 +15,11 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 #![warn(missing_docs)]
-#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(feature="dev", plugin(clippy))]
+#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
 
 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(feature="dev", allow(clone_on_copy))]
+#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
 
 //! Blockchain sync module
 //! Implements ethereum protocol version 63 as specified here:

sync/src/range_collection.rs

@@ -207,7 +207,7 @@ impl<K, V> RangeCollection<K, V> for Vec<(K, Vec<V>)> where K: Ord + PartialEq +
 }
 
 #[test]
-#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 fn test_range() {
 	use std::cmp::{Ordering};
 

util/Cargo.toml

@@ -40,7 +40,7 @@ chrono = "0.2"
 
 [features]
 default = []
-dev = ["clippy"]
+dev = []
 
 [build-dependencies]
 vergen = "*"

util/bigint/src/uint.rs

@@ -1103,7 +1103,7 @@ macro_rules! construct_uint {
 			}
 		}
 
-		#[cfg_attr(feature="dev", allow(derive_hash_xor_eq))] // We are pretty sure it's ok.
+		#[cfg_attr(all(nightly, feature="dev"), allow(derive_hash_xor_eq))] // We are pretty sure it's ok.
 		impl Hash for $name {
 			fn hash<H>(&self, state: &mut H) where H: Hasher {
 				unsafe { state.write(::std::slice::from_raw_parts(self.0.as_ptr() as *mut u8, self.0.len() * 8)); }
@@ -1485,7 +1485,7 @@ mod tests {
 	}
 
 	#[test]
-	#[cfg_attr(feature="dev", allow(eq_op))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(eq_op))]
 	pub fn uint256_comp_test() {
 		let small = U256([10u64, 0, 0, 0]);
 		let big = U256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]);
@@ -2032,7 +2032,7 @@ mod tests {
 
 
 	#[test]
-	#[cfg_attr(feature = "dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	fn u256_multi_full_mul() {
 		let result = U256([0, 0, 0, 0]).full_mul(U256([0, 0, 0, 0]));
 		assert_eq!(U512([0, 0, 0, 0, 0, 0, 0, 0]), result);

util/build.rs

@@ -1,7 +1,28 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate rustc_version;
 extern crate vergen;
 
 use vergen::*;
+use rustc_version::{version_meta, Channel};
 
 fn main() {
 	vergen(OutputFns::all()).unwrap();
+	if let Channel::Nightly = version_meta().channel {
+		println!("cargo:rustc-cfg=nightly");
+	}
 }

util/src/hash.rs

@@ -305,7 +305,7 @@ macro_rules! impl_hash {
 		}
 
 		impl Copy for $from {}
-		#[cfg_attr(feature="dev", allow(expl_impl_clone_on_copy))]
+		#[cfg_attr(all(nightly, feature="dev"), allow(expl_impl_clone_on_copy))]
 		impl Clone for $from {
 			fn clone(&self) -> $from {
 				unsafe {
@@ -637,7 +637,7 @@ mod tests {
 	use std::str::FromStr;
 
 	#[test]
-	#[cfg_attr(feature="dev", allow(eq_op))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(eq_op))]
 	fn hash() {
 		let h = H64([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
 		assert_eq!(H64::from_str("0123456789abcdef").unwrap(), h);

util/src/journaldb.rs

@@ -27,7 +27,7 @@ use std::env;
 /// Implementation of the HashDB trait for a disk-backed database with a memory overlay
 /// and latent-removal semantics.
 ///
-/// Like OverlayDB, there is a memory overlay; `commit()` must be called in order to 
+/// Like OverlayDB, there is a memory overlay; `commit()` must be called in order to
 /// write operations out to disk. Unlike OverlayDB, `remove()` operations do not take effect
 /// immediately. Rather some age (based on a linear but arbitrary metric) must pass before
 /// the removals actually take effect.
@@ -158,7 +158,7 @@ impl JournalDB {
 		backing.get(&Self::morph_key(key, 0)).expect("Low-level database error. Some issue with your hard disk?").is_some()
 	}
 
-	fn insert_keys(inserts: &Vec<(H256, Bytes)>, backing: &Database, counters: &mut HashMap<H256, i32>, batch: &DBTransaction) {
+	fn insert_keys(inserts: &[(H256, Bytes)], backing: &Database, counters: &mut HashMap<H256, i32>, batch: &DBTransaction) {
 		for &(ref h, ref d) in inserts {
 			if let Some(c) = counters.get_mut(h) {
 				// already counting. increment.
@@ -181,7 +181,7 @@ impl JournalDB {
 		}
 	}
 
-	fn replay_keys(inserts: &Vec<H256>, backing: &Database, counters: &mut HashMap<H256, i32>) {
+	fn replay_keys(inserts: &[H256], backing: &Database, counters: &mut HashMap<H256, i32>) {
 		println!("replay_keys: inserts={:?}, counters={:?}", inserts, counters);
 		for h in inserts {
 			if let Some(c) = counters.get_mut(h) {
@@ -211,12 +211,12 @@ impl JournalDB {
 					n = Some(*c);
 				}
 			}
-			match &n {
+			match n {
-				&Some(i) if i == 1 => {
+				Some(i) if i == 1 => {
 					counters.remove(&h);
 					Self::reset_already_in(batch, &h);
 				}
-				&None => {
+				None => {
 					// Gets removed when moving from 1 to 0 additional refs. Should never be here at 0 additional refs.
 					//assert!(!Self::is_already_in(db, &h));
 					batch.delete(&h.bytes()).expect("Low-level database error. Some issue with your hard disk?");
@@ -229,7 +229,7 @@ impl JournalDB {
 	/// Commit all recent insert operations and historical removals from the old era
 	/// to the backing database.
 	fn commit_with_counters(&mut self, now: u64, id: &H256, end: Option<(u64, H256)>) -> Result<u32, UtilError> {
-		// journal format: 
+		// journal format:
 		// [era, 0] => [ id, [insert_0, ...], [remove_0, ...] ]
 		// [era, 1] => [ id, [insert_0, ...], [remove_0, ...] ]
 		// [era, n] => [ ... ]
@@ -242,12 +242,12 @@ impl JournalDB {
 		// By the time comes to remove a tuple from the queue (i.e. then the era passes from recent history
 		// into ancient history) then only one commit from the tuple is considered canonical. This commit
 		// is kept in the main backing database, whereas any others from the same era are reverted.
-		// 
+		//
 		// It is possible that a key, properly available in the backing database be deleted and re-inserted
 		// in the recent history queue, yet have both operations in commits that are eventually non-canonical.
 		// To avoid the original, and still required, key from being deleted, we maintain a reference count
 		// which includes an original key, if any.
-		// 
+		//
 		// The semantics of the `counter` are:
 		// insert key k:
 		//   counter already contains k: count += 1
@@ -255,7 +255,7 @@ impl JournalDB {
 		//     backing db contains k: count = 1
 		//     backing db doesn't contain k: insert into backing db, count = 0
 		// delete key k:
-		//   counter contains k (count is asserted to be non-zero): 
+		//   counter contains k (count is asserted to be non-zero):
 		//     count > 1: counter -= 1
 		//     count == 1: remove counter
 		//     count == 0: remove key from backing db
@@ -274,7 +274,7 @@ impl JournalDB {
 		//
 
 		// record new commit's details.
-		trace!("commit: #{} ({}), end era: {:?}", now, id, end);		
+		trace!("commit: #{} ({}), end era: {:?}", now, id, end);
 		let mut counters = self.counters.as_ref().unwrap().write().unwrap();
 		let batch = DBTransaction::new();
 		{
@@ -295,7 +295,7 @@ impl JournalDB {
 			let drained = self.overlay.drain();
 			let removes: Vec<H256> = drained
 				.iter()
-				.filter_map(|(ref k, &(_, ref c))| if *c < 0 {Some(k.clone())} else {None}).cloned()
+				.filter_map(|(k, &(_, c))| if c < 0 {Some(k.clone())} else {None})
 				.collect();
 			let inserts: Vec<(H256, Bytes)> = drained
 				.into_iter()
@@ -382,12 +382,15 @@ impl JournalDB {
 
 	/// Returns heap memory size used
 	pub fn mem_used(&self) -> usize {
-		self.overlay.mem_used() + match &self.counters { &Some(ref c) => c.read().unwrap().heap_size_of_children(), &None => 0 }
+		self.overlay.mem_used() + match self.counters {
+			Some(ref c) => c.read().unwrap().heap_size_of_children(),
+			None => 0
+		}
  	}
  }
 
 impl HashDB for JournalDB {
-	fn keys(&self) -> HashMap<H256, i32> { 
+	fn keys(&self) -> HashMap<H256, i32> {
 		let mut ret: HashMap<H256, i32> = HashMap::new();
 		for (key, _) in self.backing.iter() {
 			let h = H256::from_slice(key.deref());
@@ -401,7 +404,7 @@ impl HashDB for JournalDB {
 		ret
 	}
 
-	fn lookup(&self, key: &H256) -> Option<&[u8]> { 
+	fn lookup(&self, key: &H256) -> Option<&[u8]> {
 		let k = self.overlay.raw(key);
 		match k {
 			Some(&(ref d, rc)) if rc > 0 => Some(d),
@@ -416,18 +419,18 @@ impl HashDB for JournalDB {
 		}
 	}
 
-	fn exists(&self, key: &H256) -> bool { 
+	fn exists(&self, key: &H256) -> bool {
 		self.lookup(key).is_some()
 	}
 
-	fn insert(&mut self, value: &[u8]) -> H256 { 
+	fn insert(&mut self, value: &[u8]) -> H256 {
 		self.overlay.insert(value)
 	}
 	fn emplace(&mut self, key: H256, value: Bytes) {
-		self.overlay.emplace(key, value); 
+		self.overlay.emplace(key, value);
 	}
-	fn kill(&mut self, key: &H256) { 
+	fn kill(&mut self, key: &H256) {
-		self.overlay.kill(key); 
+		self.overlay.kill(key);
 	}
 }
 

util/src/kvdb.rs

@@ -55,8 +55,7 @@ pub struct DatabaseIterator<'a> {
 impl<'a> Iterator for DatabaseIterator<'a> {
 	type Item = (Box<[u8]>, Box<[u8]>);
 
-	#[cfg_attr(feature="dev", allow(type_complexity))]
+    fn next(&mut self) -> Option<Self::Item> {
-    fn next(&mut self) -> Option<(Box<[u8]>, Box<[u8]>)> {
 		self.iter.next()
 	}
 }

util/src/lib.rs

@@ -15,18 +15,18 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 #![warn(missing_docs)]
-#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(feature="dev", plugin(clippy))]
+#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
 
 // Clippy settings
 // TODO [todr] not really sure
-#![cfg_attr(feature="dev", allow(needless_range_loop))]
+#![cfg_attr(all(nightly, feature="dev"), allow(needless_range_loop))]
 // Shorter than if-else
-#![cfg_attr(feature="dev", allow(match_bool))]
+#![cfg_attr(all(nightly, feature="dev"), allow(match_bool))]
 // We use that to be more explicit about handled cases
-#![cfg_attr(feature="dev", allow(match_same_arms))]
+#![cfg_attr(all(nightly, feature="dev"), allow(match_same_arms))]
 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(feature="dev", allow(clone_on_copy))]
+#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
 
 //! Ethcore-util library
 //!

util/src/network/discovery.rs

@@ -113,14 +113,14 @@ impl Discovery {
 	}
 
 	/// Add a new node to discovery table. Pings the node.
-	pub fn add_node(&mut self, e: NodeEntry) { 
+	pub fn add_node(&mut self, e: NodeEntry) {
 		let endpoint = e.endpoint.clone();
 		self.update_node(e);
 		self.ping(&endpoint);
 	}
 
 	/// Add a list of known nodes to the table.
-	pub fn init_node_list(&mut self, mut nodes: Vec<NodeEntry>) { 
+	pub fn init_node_list(&mut self, mut nodes: Vec<NodeEntry>) {
 		for n in nodes.drain(..) {
 			self.update_node(n);
 		}
@@ -243,7 +243,7 @@ impl Discovery {
 		self.send_to(packet, address.clone());
 	}
 
-	#[cfg_attr(feature="dev", allow(map_clone))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(map_clone))]
 	fn nearest_node_entries(target: &NodeId, buckets: &[NodeBucket]) -> Vec<NodeEntry> {
 		let mut found: BTreeMap<u32, Vec<&NodeEntry>> = BTreeMap::new();
 		let mut count = 0;
@@ -251,7 +251,7 @@ impl Discovery {
 		// Sort nodes by distance to target
 		for bucket in buckets {
 			for node in &bucket.nodes {
-				let distance = Discovery::distance(target, &node.address.id); 
+				let distance = Discovery::distance(target, &node.address.id);
 				found.entry(distance).or_insert_with(Vec::new).push(&node.address);
 				if count == BUCKET_SIZE {
 					// delete the most distant element
@@ -310,7 +310,7 @@ impl Discovery {
 				None
 			}),
 			Ok(_) => None,
-			Err(e) => { 
+			Err(e) => {
 				warn!("Error reading UPD socket: {:?}", e);
 				None
 			}
@@ -339,7 +339,7 @@ impl Discovery {
 			PACKET_PONG => self.on_pong(&rlp, &node_id, &from),
 			PACKET_FIND_NODE => self.on_find_node(&rlp, &node_id, &from),
 			PACKET_NEIGHBOURS => self.on_neighbours(&rlp, &node_id, &from),
-			_ => { 
+			_ => {
 				debug!("Unknown UDP packet: {}", packet_id);
 				Ok(None)
 			}
@@ -367,14 +367,14 @@ impl Discovery {
 		}
 		else {
 			self.update_node(entry.clone());
-			added_map.insert(node.clone(), entry); 
+			added_map.insert(node.clone(), entry);
 		}
 		let hash = rlp.as_raw().sha3();
 		let mut response = RlpStream::new_list(2);
 		dest.to_rlp_list(&mut response);
 		response.append(&hash);
 		self.send_packet(PACKET_PONG, from, &response.drain());
-		
+
 		Ok(Some(TableUpdates { added: added_map, removed: HashSet::new() }))
 	}
 
@@ -391,7 +391,7 @@ impl Discovery {
 		}
 		self.clear_ping(node);
 		let mut added_map = HashMap::new();
-		added_map.insert(node.clone(), entry); 
+		added_map.insert(node.clone(), entry);
 		Ok(None)
 	}
 
@@ -466,8 +466,8 @@ impl Discovery {
 	pub fn round(&mut self) -> Option<TableUpdates> {
 		let removed = self.check_expired(false);
 		self.discover();
-		if !removed.is_empty() { 
+		if !removed.is_empty() {
-			Some(TableUpdates { added: HashMap::new(), removed: removed }) 
+			Some(TableUpdates { added: HashMap::new(), removed: removed })
 		} else { None }
 	}
 

util/src/network/host.rs

@@ -507,7 +507,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		debug!(target: "network", "Connecting peers: {} sessions, {} pending", self.session_count(), self.handshake_count());
 	}
 
-	#[cfg_attr(feature="dev", allow(single_match))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(single_match))]
 	fn connect_peer(&self, id: &NodeId, io: &IoContext<NetworkIoMessage<Message>>) {
 		if self.have_session(id)
 		{
@@ -542,7 +542,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		self.create_connection(socket, Some(id), io);
 	}
 
-	#[cfg_attr(feature="dev", allow(block_in_if_condition_stmt))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(block_in_if_condition_stmt))]
 	fn create_connection(&self, socket: TcpStream, id: Option<&NodeId>, io: &IoContext<NetworkIoMessage<Message>>) {
 		let nonce = self.info.write().unwrap().next_nonce();
 		let mut handshakes = self.handshakes.write().unwrap();

util/src/panics.rs

@@ -71,7 +71,7 @@ impl PanicHandler {
 
 	/// Invoke closure and catch any possible panics.
 	/// In case of panic notifies all listeners about it.
-	#[cfg_attr(feature="dev", allow(deprecated))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(deprecated))]
 	pub fn catch_panic<G, R>(&self, g: G) -> thread::Result<R> where G: FnOnce() -> R + Send + 'static {
 		let _guard = PanicGuard { handler: self };
 		let result = g();

util/src/trie/triedb.rs

@@ -22,7 +22,7 @@ use super::trietraits::*;
 use super::node::*;
 
 /// A `Trie` implementation using a generic `HashDB` backing database.
-/// 
+///
 /// Use it as a `Trie` trait object. You can use `db()` to get the backing database object, `keys`
 /// to get the keys belonging to the trie in the backing database, and `db_items_remaining()` to get
 /// which items in the backing database do not belong to this trie. If this is the only trie in the
@@ -54,7 +54,7 @@ pub struct TrieDB<'db> {
 	pub hash_count: usize,
 }
 
-#[cfg_attr(feature="dev", allow(wrong_self_convention))]
+#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))]
 impl<'db> TrieDB<'db> {
 	/// Create a new trie with the backing database `db` and `root`
 	/// Panics, if `root` does not exist
@@ -63,16 +63,16 @@ impl<'db> TrieDB<'db> {
 			flushln!("TrieDB::new({}): Trie root not found!", root);
 			panic!("Trie root not found!");
 		}
-		TrieDB { 
+		TrieDB {
-			db: db, 
+			db: db,
 			root: root,
-			hash_count: 0 
+			hash_count: 0
 		}
 	}
 
 	/// Get the backing database.
-	pub fn db(&'db self) -> &'db HashDB { 
+	pub fn db(&'db self) -> &'db HashDB {
-		self.db 
+		self.db
 	}
 
 	/// Determine all the keys in the backing database that belong to the trie.
@@ -142,7 +142,7 @@ impl<'db> TrieDB<'db> {
 
 	/// Indentation helper for `formal_all`.
 	fn fmt_indent(&self, f: &mut fmt::Formatter, size: usize) -> fmt::Result {
-		for _ in 0..size { 
+		for _ in 0..size {
 			try!(write!(f, "  "));
 		}
 		Ok(())
@@ -358,7 +358,7 @@ impl<'db> fmt::Debug for TrieDB<'db> {
 fn iterator() {
 	use memorydb::*;
 	use super::triedbmut::*;
-	
+
 	let d = vec![ &b"A"[..], &b"AA"[..], &b"AB"[..], &b"B"[..] ];
 
 	let mut memdb = MemoryDB::new();

util/src/trie/triedbmut.rs

@@ -23,7 +23,7 @@ use super::journal::*;
 use super::trietraits::*;
 
 /// A `Trie` implementation using a generic `HashDB` backing database.
-/// 
+///
 /// Use it as a `Trie` trait object. You can use `db()` to get the backing database object, `keys`
 /// to get the keys belonging to the trie in the backing database, and `db_items_remaining()` to get
 /// which items in the backing database do not belong to this trie. If this is the only trie in the
@@ -66,21 +66,21 @@ enum MaybeChanged<'a> {
 	Changed(Bytes),
 }
 
-#[cfg_attr(feature="dev", allow(wrong_self_convention))]
+#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))]
 impl<'db> TrieDBMut<'db> {
 	/// Create a new trie with the backing database `db` and empty `root`
 	/// Initialise to the state entailed by the genesis block.
 	/// This guarantees the trie is built correctly.
-	pub fn new(db: &'db mut HashDB, root: &'db mut H256) -> Self { 
+	pub fn new(db: &'db mut HashDB, root: &'db mut H256) -> Self {
 		let mut r = TrieDBMut{
-			db: db, 
+			db: db,
 			root: root,
-			hash_count: 0 
+			hash_count: 0
-		}; 
+		};
 
 		// set root rlp
-		*r.root = SHA3_NULL_RLP.clone(); 
+		*r.root = SHA3_NULL_RLP.clone();
-		r 
+		r
 	}
 
 	/// Create a new trie with the backing database `db` and `root`.
@@ -91,21 +91,21 @@ impl<'db> TrieDBMut<'db> {
 			flushln!("Trie root not found {}", root);
 			panic!("Trie root not found!");
 		}
-		TrieDBMut { 
+		TrieDBMut {
-			db: db, 
+			db: db,
 			root: root,
-			hash_count: 0 
+			hash_count: 0
 		}
 	}
 
 	/// Get the backing database.
-	pub fn db(&'db self) -> &'db HashDB { 
+	pub fn db(&'db self) -> &'db HashDB {
-		self.db 
+		self.db
 	}
 
 	/// Get the backing database.
-	pub fn db_mut(&'db mut self) -> &'db mut HashDB { 
+	pub fn db_mut(&'db mut self) -> &'db mut HashDB {
-		self.db 
+		self.db
 	}
 
 	/// Determine all the keys in the backing database that belong to the trie.
@@ -184,7 +184,7 @@ impl<'db> TrieDBMut<'db> {
 
 	/// Indentation helper for `formal_all`.
 	fn fmt_indent(&self, f: &mut fmt::Formatter, size: usize) -> fmt::Result {
-		for _ in 0..size { 
+		for _ in 0..size {
 			try!(write!(f, "  "));
 		}
 		Ok(())
@@ -350,7 +350,7 @@ impl<'db> TrieDBMut<'db> {
 		}
 	}
 
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
 	/// Determine the RLP of the node, assuming we're inserting `partial` into the
 	/// node currently of data `old`. This will *not* delete any hash of `old` from the database;
 	/// it will just return the new RLP that includes the new node.
@@ -378,7 +378,7 @@ impl<'db> TrieDBMut<'db> {
 						// original had empty slot - place a leaf there.
 						true if old_rlp.at(i).is_empty() => journal.new_node(Self::compose_leaf(&partial.mid(1), value), &mut s),
 						// original has something there already; augment.
-						true => {	
+						true => {
 							let new = self.augmented(self.take_node(&old_rlp.at(i), journal), &partial.mid(1), value, journal);
 							journal.new_node(new, &mut s);
 						}