Fix compiler warnings

crates/db/memory-db/benches/bench.rs

@@ -44,7 +44,7 @@ fn instantiation(b: &mut Criterion) {
 fn compare_to_null_embedded_in_struct(b: &mut Criterion) {
     struct X {
         a_hash: <KeccakHasher as Hasher>::Out,
-    };
+    }
     let x = X {
         a_hash: KeccakHasher::hash(&[0u8][..]),
     };

crates/ethcore/src/externalities.rs

@@ -234,10 +234,8 @@ where
                     let index = self.env_info.number - number.low_u64() - 1;
                     assert!(
                         index < self.env_info.last_hashes.len() as u64,
-                        format!(
-                            "Inconsistent env_info, should contain at least {:?} last hashes",
-                            index + 1
-                        )
+                        "Inconsistent env_info, should contain at least {:?} last hashes",
+                        index + 1,
                     );
                     let r = self.env_info.last_hashes[index as usize].clone();
                     trace!(

crates/net/fetch/src/client.rs

@@ -722,7 +722,7 @@ mod test {
             .map(|resp| resp.concat2())
             .flatten()
             .map(|body| assert_eq!(&body[..], b"123"))
-            .map_err(|err| panic!(err));
+            .map_err(|err| panic!("{}", err));
 
         runtime.block_on(future).unwrap();
     }

crates/util/EIP-712/src/eip712.rs

@@ -30,9 +30,9 @@ lazy_static! {
     static ref IDENT_REGEX: Regex = Regex::new(r"^[a-zA-Z_$][a-zA-Z_$0-9]*$").unwrap();
 }
 
+#[derive(Deserialize, Serialize, Validate, Debug, Clone)]
 #[serde(rename_all = "camelCase")]
 #[serde(deny_unknown_fields)]
-#[derive(Deserialize, Serialize, Validate, Debug, Clone)]
 pub(crate) struct EIP712Domain {
     pub(crate) name: String,
     pub(crate) version: String,
@@ -42,9 +42,9 @@ pub(crate) struct EIP712Domain {
     pub(crate) salt: Option<H256>,
 }
 /// EIP-712 struct
+#[derive(Deserialize, Debug, Clone)]
 #[serde(rename_all = "camelCase")]
 #[serde(deny_unknown_fields)]
-#[derive(Deserialize, Debug, Clone)]
 pub struct EIP712 {
     pub(crate) types: MessageTypes,
     pub(crate) primary_type: String,

crates/vm/evm/benches/basic.rs

@@ -33,7 +33,7 @@ use criterion::{black_box, Bencher, Criterion};
 use ethereum_types::{Address, U256};
 use evm::Factory;
 use rustc_hex::FromHex;
-use std::{collections::BTreeMap, str::FromStr, sync::Arc};
+use std::{str::FromStr, sync::Arc};
 use vm::{tests::FakeExt, ActionParams, Ext, GasLeft, Result};
 
 criterion_group!(

crates/vm/evm/src/interpreter/mod.rs

@@ -831,10 +831,10 @@ impl<Cost: CostType> Interpreter<Cost> {
                         true,
                         CallType::StaticCall,
                     ),
-                    _ => panic!(format!(
+                    _ => panic!(
                         "Unexpected instruction {:?} in CALL branch.",
-                        instruction
-                    )),
+                        instruction,
+                    ),
                 };
 
                 // clear return data buffer before creating new call frame.