Version needs Decode.

substrate/runtime/version/src/lib.rs

@@ -64,8 +64,8 @@ macro_rules! ver_str {
 /// This triplet have different semantics and mis-interpretation could cause problems.
 /// In particular: bug fixes should result in an increment of `spec_version` and possibly `authoring_version`,
 /// absolutely not `impl_version` since they change the semantics of the runtime.
-#[derive(Clone, PartialEq, Eq, Encode)]
-#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize, Decode))]
+#[derive(Clone, PartialEq, Eq, Encode, Decode)]
+#[cfg_attr(feature = "std", derive(Debug, Serialize, Deserialize))]
 pub struct RuntimeVersion {
 	/// Identifies the different Substrate runtimes. There'll be at least polkadot and demo.
 	/// A different on-chain spec_name to that of the native runtime would normally result