core/state, core, miner: handle missing root error from state.New

1 files changed, 4 insertions, 3 deletions

diff --git a/core/genesis.go b/core/genesis.go
index 4c5c17f60..16c1598c2 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -60,7 +60,8 @@ func WriteGenesisBlock(chainDb ethdb.Database, reader io.Reader) (*types.Block,
 		return nil, err
 	}
 
-	statedb := state.New(common.Hash{}, chainDb)
+	// creating with empty hash always works
+	statedb, _ := state.New(common.Hash{}, chainDb)
 	for addr, account := range genesis.Alloc {
 		address := common.HexToAddress(addr)
 		statedb.AddBalance(address, common.String2Big(account.Balance))
@@ -115,9 +116,9 @@ func WriteGenesisBlock(chainDb ethdb.Database, reader io.Reader) (*types.Block,
 }
 
 // GenesisBlockForTesting creates a block in which addr has the given wei balance.
-// The state trie of the block is written to db.
+// The state trie of the block is written to db. the passed db needs to contain a state root
 func GenesisBlockForTesting(db ethdb.Database, addr common.Address, balance *big.Int) *types.Block {
-	statedb := state.New(common.Hash{}, db)
+	statedb, _ := state.New(common.Hash{}, db)
 	obj := statedb.GetOrNewStateObject(addr)
 	obj.SetBalance(balance)
 	root, err := statedb.Commit()