tarfs: check whether `labels` is nil

containerd / nydus-snapshotter

A containerd snapshotter with data deduplication and lazy loading in P2P fashion

https://nydus.dev/

Apache License 2.0

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Closed ChengyuZhu6 closed 1 year ago

ChengyuZhu6 commented 1 year ago

Initialize labels if labels is a nil map.

Fixes #526

ChengyuZhu6 commented 1 year ago

/cc @jiangliu