If a script runs $div(n,0) Picard will crash due to a ZeroDivisionError.
This is a bit difficult to get to, since adding e.g. a straight $div(1,0) to a script won't work since the scripting UI catches this error. But if you use a variable instead you can make it work. E.g. have $div(1,%_null%) and in a separate script before you set $set(_null,0).
Another way is to set $div(2,$if(%artist%,0,1)) . This will be fine in the scripting UI and can be saved, but when running this script on a release $if(%artist%,0,1) will usually eveluate to 0 and Picard will crash.