Fixes#365
Inspection of the code and logs shows that:
* One of the plan futures' oneshots must be returning Cancelled
* This means that the corresponding sender must have been dropped
* The sender is owned by the task spawned by spawn_launch
Presumably that entire task gets dropped as part of executor shutdown,
or something.
The correct response in this situation is to declare that we are
shutting down, and stop trying to do stuff.
Unfortunately, despite trying quite hard by putting sleeps in various
strategic places, I have not been able to reproduce the problem. So I
can't be 100% sure that the new behaviour is correct.
But I am reasonably confident that this ought not to be able to occur
unless either 1. the task from spawn_launch is dropped, or 2. that
task somehow panics despite its attempts to trap panics and report
them as errors through the oneshot.
So this "burn it all down" action ought only to occur in actually
serious situations.
I observe that
3ff9b187ea
Handle panics from circuit construction.
changed the EK for PendingCanceled to EK::ReactorShuttingDown,
and there's From impl. I think, therefore, that it is right
to reuse this Error variant.
I don't quite understand why when take_action gets an actual error it
doesn't push it, but just logs it. But I am not changing that for
now.
Arguably the two instances of retry_error.push are a sign of an
inferior flow control pattern - maybe the loop body including the code
I am adding ought to be an IEFE returning
`Result<Option<circ>, crate::Error>`.
I wanted this while debugging something.
The ad-hoc impl Debug with f.debug_struct is getting repetitive
and I've already perpetrated one copy-paste mistake.
We should consider using something like the `educe` crate's Clone.
Move rust-nightly to stage test so it runs in parallel with coverage,
which are the two longest jobs, and currently run in sequence.
Don't document dependancies, should make the step about 50% faster
Use about 12M of cache to not recompile grcov each time
Don't compile grcov with coverage, we don't need it, it's probably
slower both to compile and execute
Previously coarsetime and the traffic-timestamp feature were
enabled, since they were only required for a small corner of the
guardmgr algorithm.
But in 1.0 and beyond we'll be adding a bunch of other features (eg,
netflow padding, DoS prevention) that will need coarsetime all over
the place.
And since we're going to be doing coarsetime all over the place, the
previous justification for making traffic-timestamping optional (the
tiny performance hit) is no longer relevant.
`StateMgr` got a new `unlock()` method that does what it says on the
tin. We now call it from `bootstrap()` using the new
`util::StateMgrUnlockGuard`, which works in a manner similar to the
`BoolResetter` from `tor_dirmgr`.
(A decent small little task in future might be to unify these types in
some sort of general arti utility crate?)
closes arti#335
My proximate motivation is that tls-api wants its inner streams to be
Debug. But in general, I agree with the Rust API Guidelines notion
that almost everything should be Debug.
I have gone for the "dump all the things" approach. A more nuanced
approach would be possible too.