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core: fix error in block iterator #18986

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merged 1 commit into from
Feb 4, 2019
Merged

core: fix error in block iterator #18986

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6 changes: 3 additions & 3 deletions core/blockchain.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1143,7 +1143,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, []
switch {
// First block is pruned, insert as sidechain and reorg only if TD grows enough
case err == consensus.ErrPrunedAncestor:
return bc.insertSidechain(it)
return bc.insertSidechain(block, it)

// First block is future, shove it (and all children) to the future queue (unknown ancestor)
case err == consensus.ErrFutureBlock || (err == consensus.ErrUnknownAncestor && bc.futureBlocks.Contains(it.first().ParentHash())):
Expand Down Expand Up @@ -1285,7 +1285,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, []
//
// The method writes all (header-and-body-valid) blocks to disk, then tries to
// switch over to the new chain if the TD exceeded the current chain.
func (bc *BlockChain) insertSidechain(it *insertIterator) (int, []interface{}, []*types.Log, error) {
func (bc *BlockChain) insertSidechain(block *types.Block, it *insertIterator) (int, []interface{}, []*types.Log, error) {
var (
externTd *big.Int
current = bc.CurrentBlock()
Expand All @@ -1294,7 +1294,7 @@ func (bc *BlockChain) insertSidechain(it *insertIterator) (int, []interface{}, [
// Since we don't import them here, we expect ErrUnknownAncestor for the remaining
// ones. Any other errors means that the block is invalid, and should not be written
// to disk.
block, err := it.current(), consensus.ErrPrunedAncestor
err := consensus.ErrPrunedAncestor
for ; block != nil && (err == consensus.ErrPrunedAncestor); block, err = it.next() {
// Check the canonical state root for that number
if number := block.NumberU64(); current.NumberU64() >= number {
Expand Down
8 changes: 0 additions & 8 deletions core/blockchain_insert.go
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Original file line number Diff line number Diff line change
Expand Up @@ -111,14 +111,6 @@ func (it *insertIterator) next() (*types.Block, error) {
return it.chain[it.index], it.validator.ValidateBody(it.chain[it.index])
}

// current returns the current block that's being processed.
func (it *insertIterator) current() *types.Block {
if it.index < 0 || it.index+1 >= len(it.chain) {
return nil
}
return it.chain[it.index]
}

// previous returns the previous block was being processed, or nil
func (it *insertIterator) previous() *types.Block {
if it.index < 1 {
Expand Down