Comment 8 for bug 1174498

Here are some details for one constraint example:

ERROR: duplicate key value violates unique constraint "x_p_b_once"
DETAIL: Key (xact, payment, billing)=(2504059, 188199, 3408744) already exists.

money.payment rows:
188199;2504059;"2014-08-18 16:27:43.876616-05";f;0.25;""
188198;2504059;"2014-08-18 16:27:24.274333-05";f;0.10;""

money.billing rows:
3413280;2504059;"2014-08-16 23:59:59-05";f;;"";0.15;"Overdue materials";1;"System Generated Overdue Fine"
3410418;2504059;"2014-08-15 23:59:59-05";f;;"";0.15;"Overdue materials";1;"System Generated Overdue Fine"
3408744;2504059;"2014-08-14 23:59:59-05";f;;"";0.15;"Overdue materials";1;"System Generated Overdue Fine"

So, it looks like the function has targeted the same billing id twice for the same payment. The 25 cents is paying billing line 3408744 two times. There must be something wrong with the logic or I don't have the correct function on my test machine.