This test started failing presumably somewhere during #5886. Testing
with a comet on the network, the test seems inaccurate: the comet can
communicate and be communicated to just fine.
Previously we were dropping events that used old
wires that lacked a rift in them. This seems a
bad behavior because we don't want to destroy a
flow that has not been processed by both ends.
Note: pending a fix to test-old-ames-wire
Threads should eventually take and produce $cage instead of $vase. Since
%khan is likely to be used by third parties, we write to the eventual
intended API. We ignore the mark on the input $cage (it is safe to
always specify %noun), and we always use %noun as the output mark.
%fyrd now makes more sense. It was previously discarding the type of the
output %arow and re-encoding the raw noun as a vase of the output mark;
it is now performing mark conversion from the mark of the output $cage
to the originally requested output mark.
nara: swedish for near, provides a trace from the start of the nearest virtualization
to the statement wrapped by the nara hint.
hela: swedish for whole, provides a trace from the start of the event
to the statement wrapped by the hela hint.
The eventual goal is to present these traces in a way that is most salient & useful to developers
and in a way that is aesthetically pleasing as the bout hint is useful and nice looking.
For this pull request the goal is to provide the actual functionality in code that we can feel
safe and comfortable adding to the master branch. To this end, I've added a trivial set of tests for
nara and hela in pkg/arvo/tests/run/hints.hoon - they only prove that invoking these hints will not
crash the runtime, but I'm open to ideas for how I can test these hints further.
Also strips out `$` from khan top-level comment.
There are arguments for keeping $crag in lull, and on the other side for
moving $cast to arvo. This seemed like the most reasonable approach.
%fyrd is now implemented in terms of %fard, and likewise %avow in terms
of %arow. State is tracked via wire rather than in a global map.
Unit tests adjusted to match.
