Use absolute path in native_executor for Blake2Hasher (#1671)

substrate/core/executor/src/lib.rs

@@ -46,7 +46,8 @@ pub use native_executor::{with_native_environment, NativeExecutor, NativeExecuti
 pub use state_machine::Externalities;
 pub use runtime_version::{RuntimeVersion, NativeVersion};
 pub use parity_codec::Codec;
-use primitives::Blake2Hasher;
+#[doc(hidden)]
+pub use primitives::Blake2Hasher;
 
 /// Provides runtime information.
 pub trait RuntimeInfo {

substrate/core/executor/src/native_executor.rs

@@ -266,14 +266,13 @@ macro_rules! native_executor_instance {
 		native_executor_instance!(IMPL $name, $dispatcher, $version, $code);
 	};
 	(IMPL $name:ident, $dispatcher:path, $version:path, $code:expr) => {
-		use primitives::Blake2Hasher as _Blake2Hasher;
 		impl $crate::NativeExecutionDispatch for $name {
 			fn native_equivalent() -> &'static [u8] {
 				// WARNING!!! This assumes that the runtime was built *before* the main project. Until we
 				// get a proper build script, this must be strictly adhered to or things will go wrong.
 				$code
 			}
-			fn dispatch(ext: &mut $crate::Externalities<_Blake2Hasher>, method: &str, data: &[u8]) -> $crate::error::Result<Vec<u8>> {
+			fn dispatch(ext: &mut $crate::Externalities<$crate::Blake2Hasher>, method: &str, data: &[u8]) -> $crate::error::Result<Vec<u8>> {
 				$crate::with_native_environment(ext, move || $dispatcher(method, data))?
 					.ok_or_else(|| $crate::error::ErrorKind::MethodNotFound(method.to_owned()).into())
 			}