Lighthouse releases do not compile with latest Rust (1.65.0)

[michaelsproul]

Description

The latest Lighthouse release v3.2.1 cannot be compiled with Rust 1.65.0.

This is due to an inconsequential yet annoying incompatibility rather than a serious issue. The incompatibility is fixed in unstable and our next releases will be compatible with Rust 1.65.0.

The Error

The compilation error indicating the incompatibility looks like this:

error[E0275]: overflow evaluating the requirement `Vec<u8>: std::marker::Send`
  |
  = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`http_api`)
  = note: required because it appears within the type `std::result::Result<Vec<u8>, ()>`
  = note: required because it appears within the type `warp::reply::Json`
  = note: required because it appears within the type `(warp::reply::Json,)`
  = note: required for `BoxedFilter<(warp::reply::Json,)>` to implement `warp::filter::FilterBase`
  = note: required for `BoxedFilter<(warp::reply::Json,)>` to implement `warp::Filter`
  = note: 121 redundant requirements hidden
  = note: required for `warp::cors::internal::CorsFilter<warp::filter::map::Map<log::internal::WithLog<[closure@beacon_node/http_api/src/lib.rs:183:23: 183:34], log::internal::WithLog<[closure@beacon_node/http_api/src/lib.rs:150:23: 150:34], warp::filter::recover::Recover<warp::filter::or::Or<warp::filter::and::And<warp::filter::FilterFn<[closure@warp::filters::method::method_is<[closure@warp::get::{closure#0}]>::{closure#0}]>, warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<BoxedFilter<(warp::reply::Json,)>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::WithHeader<warp::http::Response<warp::hyper::Body>>,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::WithHeader<warp::http::Response<warp::hyper::Body>>,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(WithStatus<eth2::StatusCode>,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::http::Response<Vec<u8>>,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(sse::SseReply<sse::SseKeepAlive<futures::stream::SelectAll<tokio_stream::stream_ext::map::Map<BroadcastStream<EventKind<<T as BeaconChainTypes>::EthSpec>>, [closure@beacon_node/http_api/src/lib.rs:3071:79: 3071:84]>>>>,)>>>, warp::filter::and::And<warp::filter::FilterFn<[closure@warp::filters::method::method_is<[closure@post::{closure#0}]>::{closure#0}]>, warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<warp::filter::or::Or<BoxedFilter<(eth2::StatusCode,)>, BoxedFilter<(eth2::StatusCode,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>, BoxedFilter<(warp::reply::Json,)>>>>, fn(Rejection) -> impl futures::Future<Output = std::result::Result<impl Reply, Infallible>> {handle_rejection}>>>, [closure@beacon_node/http_api/src/lib.rs:3187:14: 3187:21]>>` to implement `warp::filter::FilterBase`
  = note: required because it appears within the type `(std::net::SocketAddr, impl futures::Future<Output = ()>)`

The Workaround

From the lighthouse source directory, set an override for the 1.64 compiler then run make as normal:

rustup override set 1.64
make

[michaelsproul]

Fixed by v3.3.0