My Raspberry Pi is full and I think I found the problem, it appears to be creating swap files recursively, though I have no idea why.

Each of these has a 100MB swap file:

/proc/self/fd/15/var

/proc/self/fd/15/proc/self/fd/15/var

/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/var

/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/var

/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/var

/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/proc/self/fd/15/var

etc...

There are 20 of these!

Any idea what is going on? How can I delete these files? When I try to trash them in the GUI it fails.