From b3d2e85e55509210809e32aa8e491e1a119dae7f Mon Sep 17 00:00:00 2001
From: Michael Sproul <michael@sigmaprime.io>
Date: Mon, 23 Feb 2026 17:28:46 +1100
Subject: [PATCH] Avoid Result::flatten (would require MSRV bump)

---
 beacon_node/store/src/hot_cold_store.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/beacon_node/store/src/hot_cold_store.rs b/beacon_node/store/src/hot_cold_store.rs
index d858ef904e..849099ecfb 100644
--- a/beacon_node/store/src/hot_cold_store.rs
+++ b/beacon_node/store/src/hot_cold_store.rs
@@ -2494,8 +2494,7 @@ impl<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>> HotColdDB<E, Hot, Cold>
                         .ok_or(Error::MissingBlock(block_root))
                 })
                 .collect::<Result<Vec<_>, Error>>()
-        })
-        .flatten()?;
+        })??;
 
         // If Gloas is not enabled for any slots in the range, just return `blocks`.
         if !self.spec.fork_name_at_slot::<E>(start_slot).gloas_enabled()