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-rw-r--r--chain/chain_manager.go1
1 files changed, 1 insertions, 0 deletions
diff --git a/chain/chain_manager.go b/chain/chain_manager.go
index 46e0703c1..217a50103 100644
--- a/chain/chain_manager.go
+++ b/chain/chain_manager.go
@@ -337,6 +337,7 @@ func (self *ChainManager) InsertChain(chain *BlockChain) {
func (self *ChainManager) TestChain(chain *BlockChain) (td *big.Int, err error) {
self.workingChain = chain
+ defer func() { self.workingChain = nil }()
for e := chain.Front(); e != nil; e = e.Next() {
var (