State machine hides callback exceptions. (SOLVED)

[vdzk]

When I get an error like "an exception occurred in a caller-provided callback function" is there a way of finding out what that exception might be? If not, this is a huge problem for debugging.

[vdzk]

My apologies. I read through the code and found out that the state machine returns error stack as it's 7th argument.

It would be helpful if this was included in the README.

[donaldr]

I agree; it's still not included in the readme.

[etiennechabert]

+1 This information could be very helpful