I've just noticed a huge amount of disk space being taken up by a set of
directories named
HUDSON_HOME/jobs/<jobname>/builds/<yyyy-mm-dd_hh-mm-ss/workspace-files.
These "workspace-files" directories contain a large number of files, all with
the suffix ".tmp".

It looks like the warnings plugin copies any files that have compiler warnings
from the workspace (possibly on a slave) into a "workspace-files" directory
within HUDSON_HOME/jobs/<jobname>/builds/<yyyy-mm-dd_hh-mm-ss/.

The files then, I surmise, get processed resulting in a "compiler-warnings.xml"
file within the HUDSON_HOME/jobs/<jobname>/builds/<yyyy-mm-dd_hh-mm-ss/
directory (note: NOT within the "workspace-files" directory).

Is this a bug in the warnings plugin? Shouldn't it delete the "workspace-files"
directory when it is finished with it?