Just like its pal bld-lion-r5-042, 085 has gotten into the state where it can't, or can't reliably, create directories and/or files in TMPDIR for the cppunittests that expect it to. You could get disk diagnostics run on it, but it would be faster and simpler to just get it reimaged and see how that works out.
Disabled in slavealloc
Attempting SSH reboot...Failed. Attempting PDU reboot...Failed. Filed IT bug for reboot (bug 990244)
Stopped taking jobs, diagnostics in bug 1111910