fix compile errors with new Rust (#854)

* fix compile errors with new Rust

* try fixing rug compilation error

bounded-collections/src/bounded_btree_map.rs

@@ -655,10 +655,11 @@ mod test {
 	#[test]
 	#[cfg(feature = "std")]
 	fn container_can_derive_hash() {
-		#[derive(Hash)]
+		#[derive(Hash, Default)]
 		struct Foo {
 			bar: u8,
 			map: BoundedBTreeMap<String, usize, ConstU32<16>>,
 		}
+		let _foo = Foo::default();
 	}
 }

bounded-collections/src/bounded_btree_set.rs

@@ -579,11 +579,12 @@ mod test {
 	#[test]
 	#[cfg(feature = "std")]
 	fn container_can_derive_hash() {
-		#[derive(Hash)]
+		#[derive(Hash, Default)]
 		struct Foo {
 			bar: u8,
 			set: BoundedBTreeSet<String, ConstU32<16>>,
 		}
+		let _foo = Foo::default();
 	}
 
 	#[cfg(feature = "serde")]

bounded-collections/src/bounded_vec.rs

@@ -925,7 +925,7 @@ where
 #[cfg(all(test, feature = "std"))]
 mod test {
 	use super::*;
-	use crate::{bounded_vec, ConstU32, ConstU8};
+	use crate::{bounded_vec, ConstU32};
 	use codec::CompactLen;
 
 	#[test]
@@ -1363,8 +1363,9 @@ mod test {
 		#[derive(Hash)]
 		struct Foo<'a> {
 			bar: u8,
-			slice: BoundedSlice<'a, usize, ConstU8<8>>,
+			slice: BoundedSlice<'a, usize, ConstU32<4>>,
 			map: BoundedVec<String, ConstU32<16>>,
 		}
+		let _foo = Foo { bar: 42, slice: BoundedSlice::truncate_from(&[0, 1][..]), map: BoundedVec::default() };
 	}
 }

fixed-hash/src/hash.rs

@@ -255,7 +255,6 @@ macro_rules! construct_fixed_hash {
 
 		impl $crate::core_::marker::Copy for $name {}
 
-		#[cfg_attr(feature = "dev", allow(expl_impl_clone_on_copy))]
 		impl $crate::core_::clone::Clone for $name {
 			fn clone(&self) -> $name {
 				*self

uint/Cargo.toml

@@ -34,7 +34,10 @@ criterion = "0.5.1"
 num-bigint = "0.4.0"
 
 [target.'cfg(all(unix, target_arch = "x86_64"))'.dev-dependencies]
-rug = { version = "1.6.0", default-features = false, features = ["integer"] }
+rug = { version = "1.6.0", default-features = false, features = [
+    "integer",
+    "std",
+] }
 
 [[bench]]
 name = "bigint"