How to Empty Bulk? ypops 0.6

[jellycom]

What is the correct entry in ypopsrc for "empty bulk"?

I tried EMPTY_BULK_ON_EXIT 1, EMPTY_BULKMAIL_ON_EXIT 1, EMPTY_BULKFOLDER_ON_EXIT 1, and EMPTY_BULKMAIL 1.

All of them gave a Segmentation fault with core dump.