NOT THE OFFICIAL PAR REPO.
Its start point is a snapshot of the svn repo at revision 1528.
This was for work on re-extracting deleted cache files after some process has cleaned up most of the temp files but not all.
PAR calls otherwise failed in such cases.
The official PAR repo is at https://www.openfoundry.org/svn/par/
The issue was fixed in PAR::Packer 1.026, with the actual fix in PAR 1.010. See https://rt.cpan.org/Ticket/Display.html?id=101800