Folders get dumped as null values

[cap10morgan]

When backing up my Consul kv store, I get lots (but not all) folders dumped as null values like this:

[
    "my-folder/",
    0,
    null
],
[
    "top-level-folder/nested-folder/",
    0,
    "null"
]

This creates non-folder entries on restore with the folder name as the key and null or "null" as the value.

If these were simply not present in the backup data, the restore would do what I expect. If I go through and delete them from the resulting JSON, everything restores just fine.

I haven't yet been able to discern a common pattern for the folders that this happens to vs. the ones it does not.

I have seen this with both 0.6.0 and master HEAD as of a few minutes ago (reporting itself as 0.7.0.rc0).