Allow for 0 existential deposit in benchmarks for pallet_staking, pallet_session, and pallet_balances

substrate/frame/balances/src/benchmarking.rs

@@ -44,7 +44,7 @@ mod benchmarks {
 		let caller = whitelisted_caller();
 
 		// Give some multiple of the existential deposit
-		let balance = existential_deposit.saturating_mul(ED_MULTIPLIER.into());
+		let balance = existential_deposit.saturating_mul(ED_MULTIPLIER.into()).max(1u32.into());
 		let _ = <Balances<T, I> as Currency<_>>::make_free_balance_be(&caller, balance);
 
 		// Transfer `e - 1` existential deposits + 1 unit, which guarantees to create one account,

substrate/frame/staking/src/testing_utils.rs

@@ -77,7 +77,7 @@ pub fn create_stash_controller<T: Config>(
 	destination: RewardDestination<T::AccountId>,
 ) -> Result<(T::AccountId, T::AccountId), &'static str> {
 	let staker = create_funded_user::<T>("stash", n, balance_factor);
-	let amount = T::Currency::minimum_balance() * (balance_factor / 10).max(1).into();
+	let amount = T::Currency::minimum_balance().max(1u64.into()) * (balance_factor / 10).max(1).into();
 	Staking::<T>::bond(RawOrigin::Signed(staker.clone()).into(), amount, destination)?;
 	Ok((staker.clone(), staker))
 }