Unhandled exceptions are making it to C API boundary

[jackgerrits]

trafficstars

The main issue preventing a fix to the current API is the use of void functions that mean the error status cannot be reasonably conveyed out of the function call.

This was an incorrect design decision was originally created and to change it now might break someone. We should introduce a new API that fixes this shortcoming and so is a feature request.

[lokitoth]

This should be its own project, maybe? Or a tag?