Haha, reminds me of some Scheme interpreter that would just say something like 'missing paren' at position 0 or EOF depending on where the imbalance was :) ...

Haha, reminds me of some Scheme interpreter that would just say something like 'missing paren' at position 0 or EOF depending on where the imbalance was :) ... but, yeah... I'm pretty sure there could be some hints as to whereabouts that infinite recursion was detected.