Debugging named function filters properly

Hi there, How does one debug filters properly as I'm getting lots of: 2021-06-12 09:02:35 <ERR> filters, line 82: Argument 1 of instruction FI_CONDITION must be of type T_BOOL, got 0x00 2021-06-12 09:02:35 <ERR> filters, line 452: Argument 1 of instruction FI_CONDITION must be of type T_BOOL, got 0x00 in logs, but I need it to say which function that is or even file, so how would I debug this properly? Just "debug { filters; }" doesn't help much. I'm using Bird 2.0.7 at the moment.