Generate storage info for treasury pallet (#9368)

substrate/frame/treasury/src/lib.rs

@@ -62,7 +62,7 @@ mod tests;
 mod benchmarking;
 pub mod weights;
 
-use codec::{Encode, Decode};
+use codec::{Encode, Decode, MaxEncodedLen};
 
 use sp_std::prelude::*;
 use sp_runtime::{
@@ -116,7 +116,7 @@ pub type ProposalIndex = u32;
 
 /// A spending proposal.
 #[cfg_attr(feature = "std", derive(serde::Serialize, serde::Deserialize))]
-#[derive(Encode, Decode, Clone, PartialEq, Eq, RuntimeDebug)]
+#[derive(Encode, Decode, Clone, PartialEq, Eq, MaxEncodedLen, RuntimeDebug)]
 pub struct Proposal<AccountId, Balance> {
 	/// The account proposing it.
 	proposer: AccountId,
@@ -136,6 +136,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::generate_store(pub(super) trait Store)]
+	#[pallet::generate_storage_info]
 	pub struct Pallet<T, I = ()>(PhantomData<(T, I)>);
 
 	#[pallet::config]