[Piuparts-reports] detect_stale_mounts

[piuparts master]

More than one mountpoint below /org/piuparts.debian.org/tmp detected!

proc /org/piuparts.debian.org/tmp/tmpTFWAW5/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpqVoqte/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpo5PniV/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpHXhRZf/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpc9hClX/proc proc rw,relatime 0 0

Zero or one mountpoint is normal for piuparts operation, more is not.
Please investigate and cleanup.