Merge remote-tracking branch 'origin/unstable' into tree-states

beacon_node/beacon_chain/src/errors.rs

@@ -210,6 +210,7 @@ pub enum BeaconChainError {
     BlsToExecutionConflictsWithPool,
     InconsistentFork(InconsistentFork),
     ProposerHeadForkChoiceError(fork_choice::Error<proto_array::Error>),
+    UnableToPublish,
 }
 
 easy_from_to!(SlotProcessingError, BeaconChainError);