Don't print a stack trace for `read-at-aeon-fail`
We shouldn't get a clay stack trace for read-at-aeon-fail because that gives us miles of clay stack trace whenever hoon compilation fails
[~ ..park]
:: virtualize to catch and produce deterministic failures
::
- !:
|^ =/ res (mule |.(read))
?: ?=(%& -.res) p.res
%. [[~ ~] ..park]
