Debugging named function filters properly

[Skyler Mäntysaari]

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.