From c9471e778209e16442a530820fb90c01cd47c369 Mon Sep 17 00:00:00 2001
From: Nick Johnson <arachnid@notdot.net>
Date: Tue, 18 Oct 2016 21:34:37 +0100
Subject: [PATCH] miner: copy pending state before handing it to callers
(#3162)
The pending state was not copied while not mining, leading to a data race.
---
miner/worker.go | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/miner/worker.go b/miner/worker.go
index e5348cef4..89064c3b9 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -169,7 +169,7 @@ func (self *worker) pending() (*types.Block, *state.StateDB) {
self.current.txs,
nil,
self.current.receipts,
- ), self.current.state
+ ), self.current.state.Copy()
}
return self.current.Block, self.current.state.Copy()
}
--
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