import glob, math, os, resource, struct, sys, tempfile
from bup import options, git, midx, _helpers, xstat
-from bup.helpers import (Sha1, atomically_replaced_file, debug1, fdatasync,
+from bup.helpers import (Sha1, add_error, atomically_replaced_file, debug1, fdatasync,
handle_ctrl_c, log, mmap_readwrite, qprogress,
saved_errors, unlink)