From 9d49c6861f7be4a96000d842e1b0eedfd1cf0219 Mon Sep 17 00:00:00 2001
From: Jeromy <jeromyj@gmail.com>
Date: Mon, 8 Jun 2020 09:51:47 -0700
Subject: [PATCH] don't update the mining base if mining fails for some reason

---
 miner/miner.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/miner/miner.go b/miner/miner.go
index e906e6e70..f2059ef7f 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -153,13 +153,14 @@ func (m *Miner) mine(ctx context.Context) {
 			m.niceSleep(build.BlockDelay * time.Second)
 			continue
 		}
-		lastBase = *base
 
 		b, err := m.mineOne(ctx, base)
 		if err != nil {
 			log.Errorf("mining block failed: %+v", err)
+			m.niceSleep(time.Second)
 			continue
 		}
+		lastBase = *base
 
 		onDone(b != nil)