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.
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.
I agree; it's still not included in the readme.
+1 This information could be very helpful
updated readme to show that custom error handler can access the origi…
…nal exception (issue #62)