fixup: avoid underflow issue

paritytech · Aug 31, 2021 · 336cbe2 · 336cbe2
1 parent 139ecf9
commit 336cbe2
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/node/service/src/relay_chain_selection.rs b/node/service/src/relay_chain_selection.rs
@@ -417,8 +417,8 @@ where
 
 		let (lag, subchain_head) = if cfg!(feature = "disputes") {
 			// Prevent sending flawed data to the dispute-coordinator.
-			if Some(subchain_block_descriptions.len() as u32 - 1) !=
-				subchain_number.checked_sub(target_number)
+			if Some(subchain_block_descriptions.len() as u64) !=
+				(subchain_number + 1_u64).checked_sub(target_number)
 			{
 				tracing::error!(
 					LOG_TARGET,