Fixing clippy warnings

ethcore/src/executive.rs

@@ -140,10 +140,8 @@ impl<'a> Executive<'a> {
 		let init_gas = t.gas - base_gas_required;
 
 		// validate transaction nonce
-		if check_nonce {
-			if t.nonce != nonce {
-				return Err(From::from(ExecutionError::InvalidNonce { expected: nonce, got: t.nonce }));
-			}
+		if check_nonce && t.nonce != nonce {
+			return Err(From::from(ExecutionError::InvalidNonce { expected: nonce, got: t.nonce }));
 		}
 
 		// validate if transaction fits into given block

ethcore/src/externalities.rs

@@ -67,6 +67,8 @@ pub struct Externalities<'a, T> where T: 'a + Tracer {
 }
 
 impl<'a, T> Externalities<'a, T> where T: 'a + Tracer {
+
+	#[cfg_attr(feature="dev", allow(too_many_arguments))]
 	/// Basic `Externalities` constructor.
 	pub fn new(state: &'a mut State,
 		env_info: &'a EnvInfo,

ethcore/src/substate.rs

@@ -19,7 +19,7 @@ use common::*;
 
 /// State changes which should be applied in finalize,
 /// after transaction is fully executed.
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub struct Substate {
 	/// Any accounts that have suicided.
 	pub suicides: HashSet<Address>,

ethcore/src/trace/trace.rs

@@ -17,7 +17,7 @@
 //! Tracing datatypes.
 use common::*;
 
-/// TraceCall result.
+/// `TraceCall` result.
 #[derive(Debug, Clone, PartialEq, Default)]
 pub struct TraceCallResult {
 	/// Gas used by call.
@@ -26,7 +26,7 @@ pub struct TraceCallResult {
 	pub output: Bytes,
 }
 
-/// TraceCreate result.
+/// `TraceCreate` result.
 #[derive(Debug, Clone, PartialEq)]
 pub struct TraceCreateResult {
 	/// Gas used by create.