Feature Request: Diagnostics on Duktape Errors/Warnings

[wwgordon]

Hi Brent,

Following up on #158, I was wondering if it might be possible to have some additional diagnostics provided when duktape errors or warnings are thrown. Specifically, in my experience it would be very helpful to have either a line number or a genomic coordinate so that one could identify the variant(s) that are responsible for the issue. Issues with duktape comprised the vast majority of our time spent troubleshooting.

Thanks!
William