Make a note that genesis does not produce a spent output

service/tbc/crawler.go

@@ -1100,6 +1100,9 @@ func (s *Server) IndexIsLinear(ctx context.Context, startHash, endHash *chainhas
 
 // SyncIndexersToHash tries to move the various indexers to the supplied
 // height (inclusive).
+// Note: on unwind it means that it WILL unwind the the various indexers
+// including the hash that was passed in. E.g. if this unwinds from 1001 to
+// 1000 the indexes for block 1000 WILL be updated as well.
 func (s *Server) SyncIndexersToHash(ctx context.Context, hash *chainhash.Hash) error {
 	log.Tracef("SyncIndexersToHash")
 	defer log.Tracef("SyncIndexersToHash exit")

service/tbc/tbcfork_test.go

@@ -1223,11 +1223,17 @@ func TestIndexNoFork(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+
+	// grab genesis tx and make sure it exists in the db
 	genesisTx, err := s.TxByTxId(ctx, g.Hash())
 	if err != nil {
 		t.Fatal(err)
 	}
 	t.Logf("%v", spew.Sdump(genesisTx))
+	_, err = s.SpendOutputsByTxId(ctx, g.Hash())
+	if err == nil {
+		t.Fatal("genesis coinbase tx should not be spent")
+	}
 
 	// XXX verify the balances
 	for address := range n.keys {