[Piuparts-reports] detect_stale_mounts

[piuparts master]

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

proc /org/piuparts.debian.org/tmp/tmppjDvZX/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpmbkhWy/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpy1nNgl/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmp3PtwoP/proc proc rw,relatime 0 0
proc /org/piuparts.debian.org/tmp/tmpN0FFyU/proc proc rw,relatime 0 0

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