Unfortunately I don't remember. From the (little) notes I kept, the corruption occurred with restic version 0.9.3. I had also tried restoring with the latest code from git master, but I didn't make a note of the exact commit (it didn't make a difference anyway).

The commands that triggered the corruption were the following. I tested the restore around the 10th run of this.

    repo=sftp:chenxiaolong@<ip address>:/home/restic
    restic -r "${repo}" backup -x /home
    restic -r "${repo}" backup -x --exclude /stuff/Android/AOSP /stuff
    restic -r "${repo}" forget --keep-last 3 --prune