; shouldn't exit code be 1 ?
register
<<<
2009/1/1 a
  b  1.1
  c  -1
>>>
>>>2
"-" (line 4, column 1):
unexpected end of input
could not balance this transaction, amounts do not add up to zero:
2009/01/01 a
    b                                            1.1
    c                                             -1


===0