I'm trying to work out how to catch exceptions close to source in some code 
with structure similar to this:
https://www.refheap.com/68851

A doall on line 13 doesn't change the outcome.

So not involving records and protocol a similar structure does what I 
expect it to do, but with them I seem unable to catch exceptions taking 
place inside the proto fns.

So I realize I'm missing something around how exception handlers are setup 
and triggered with regards to either lazy eval, lambdas or protocols (or 
some combo therein).

I'd like my toy example to calculate 20 as a result of calling 
(trigger-fn), same as it does with (trigger-fn2).

Any explanations of what's going here would be most welcome - I'd really 
like to understand the exception handling logic.

Thanks,
Patrik

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