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fix: rootKey empty check by len equals 0 (backport #801) #809

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merged 2 commits into from
Aug 10, 2023
Merged

fix: rootKey empty check by len equals 0 (backport #801) #809

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9c9eee2
fix: rootKey empty check by len equals 0 (#801)
mmsqe Aug 7, 2023
2453df9
fix changelog
julienrbrt Aug 10, 2023
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3 changes: 1 addition & 2 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -13,13 +13,12 @@
### Bug Fixes

- [#773](https://github.com/cosmos/iavl/pull/773) Fix memory leak in `Import`.
- [#801](https://github.com/cosmos/iavl/pull/801) Fix rootKey empty check by len equals 0.

### Breaking Changes

- [#735](https://github.com/cosmos/iavl/pull/735) Pass logger to `NodeDB`, `MutableTree` and `ImmutableTree`

- [#646](https://github.com/cosmos/iavl/pull/646) Remove the `orphans` from the storage

- [#777](https://github.com/cosmos/iavl/pull/777) Don't return errors from ImmutableTree.Hash, NewImmutableTree, NewImmutableTreeWIthOpts

### API Changes
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2 changes: 1 addition & 1 deletion iterator.go
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Expand Up @@ -269,7 +269,7 @@ type NodeIterator struct {

// NewNodeIterator returns a new NodeIterator to traverse the tree of the root node.
func NewNodeIterator(rootKey []byte, ndb *nodeDB) (*NodeIterator, error) {
if rootKey == nil {
if len(rootKey) == 0 {
return &NodeIterator{
nodesToVisit: []*Node{},
ndb: ndb,
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4 changes: 4 additions & 0 deletions iterator_test.go
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Expand Up @@ -366,4 +366,8 @@ func TestNodeIterator_WithEmptyRoot(t *testing.T) {
itr, err := NewNodeIterator(nil, newNodeDB(dbm.NewMemDB(), 0, nil, log.NewNopLogger()))
require.NoError(t, err)
require.False(t, itr.Valid())

itr, err = NewNodeIterator([]byte{}, newNodeDB(dbm.NewMemDB(), 0, nil, log.NewNopLogger()))
require.NoError(t, err)
require.False(t, itr.Valid())
}