Fix warnings in substrate (#1523)

* Fix warnings in substrate

* More warnings removed and wasm updated

* Fixes error on stable and grumbles

* Update wasm files

* Add links to the github issue for replacing `error-chain`

substrate/core/cli/src/error.rs

@@ -16,6 +16,10 @@
 
 //! Initialization errors.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
+
 use client;
 use error_chain::{error_chain, error_chain_processing, impl_error_chain_processed,
 	impl_extract_backtrace, impl_error_chain_kind};

substrate/core/client/src/error.rs

@@ -16,6 +16,9 @@
 
 //! Substrate client possible errors.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
 #![allow(missing_docs)]
 
 use std;

substrate/core/executor/src/error.rs

@@ -16,6 +16,10 @@
 
 //! Rust executor possible errors.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
+
 use state_machine;
 use serializer;
 use wasmi;

substrate/core/keystore/src/lib.rs

@@ -16,6 +16,10 @@
 
 //! Keystore (and session key management) for ed25519 based chains like Polkadot.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
+
 extern crate substrate_primitives;
 extern crate parity_crypto as crypto;
 extern crate subtle;

substrate/core/network/src/error.rs

@@ -16,6 +16,10 @@
 
 //! Substrate service possible errors.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
+
 use std::io::Error as IoError;
 use network_libp2p::Error as NetworkError;
 use client;

substrate/core/primitives/src/lib.rs

@@ -47,7 +47,6 @@ extern crate untrusted;
 extern crate hex_literal;
 
 #[cfg(feature = "std")]
-#[macro_use]
 extern crate impl_serde;
 
 #[cfg(feature = "std")]

substrate/core/service/src/error.rs

@@ -16,6 +16,10 @@
 
 //! Errors that can occur during the service operation.
 
+// Silence: `use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting`
+// https://github.com/paritytech/substrate/issues/1547
+#![allow(deprecated)]
+
 use client;
 use network;
 use keystore;

substrate/core/sr-io/without_std.rs

@@ -58,17 +58,11 @@ pub extern fn oom(_: ::core::alloc::Layout) -> ! {
 /// (most importantly, storage) or perform heavy hash calculations.
 /// See also "ext_" functions in sr-sandbox and sr-std
 extern "C" {
-	/// Most of the functions below return fixed-size arrays (e.g. hashes) by writing them into
-	/// memory regions that should be preallocated by module. 
-	/// Functions that return variable-sized data use host-side allocations. These should be
-	/// manually freed by the module.
-	fn ext_free(addr: *mut u8);
-	
 	/// Printing, useful for debugging
 	fn ext_print_utf8(utf8_data: *const u8, utf8_len: u32);
 	fn ext_print_hex(data: *const u8, len: u32);
 	fn ext_print_num(value: u64);
-	
+
 	/// Host storage access and verification
 	fn ext_set_storage(key_data: *const u8, key_len: u32, value_data: *const u8, value_len: u32);
 	fn ext_set_child_storage(storage_key_data: *const u8, storage_key_len: u32, key_data: *const u8, key_len: u32, value_data: *const u8, value_len: u32);
@@ -86,12 +80,12 @@ extern "C" {
 	fn ext_get_child_storage_into(storage_key_data: *const u8, storage_key_len: u32, key_data: *const u8, key_len: u32, value_data: *mut u8, value_len: u32, value_offset: u32) -> u32;
 	fn ext_storage_root(result: *mut u8);
 	/// Host-side result allocation
-	fn ext_child_storage_root(storage_key_data: *const u8, storage_key_len: u32, written_out: *mut u32) -> *mut u8; 
+	fn ext_child_storage_root(storage_key_data: *const u8, storage_key_len: u32, written_out: *mut u32) -> *mut u8;
 	fn ext_storage_changes_root(parent_hash_data: *const u8, parent_hash_len: u32, parent_num: u64, result: *mut u8) -> u32;
-	
+
 	/// The current relay chain identifier.
 	fn ext_chain_id() -> u64;
-	
+
 	/// Hash calculation and verification
 	fn ext_blake2_256_enumerated_trie_root(values_data: *const u8, lens_data: *const u32, lens_len: u32, result: *mut u8);
 	fn ext_blake2_256(data: *const u8, len: u32, out: *mut u8);