[INFO] cloning repository https://github.com/EwanValentine/rust-paxos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EwanValentine/rust-paxos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEwanValentine%2Frust-paxos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEwanValentine%2Frust-paxos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 331d29815f2185dbbd6fbdf372b89bc6427bd5ef
[INFO] testing EwanValentine/rust-paxos against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEwanValentine%2Frust-paxos" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EwanValentine/rust-paxos on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EwanValentine/rust-paxos
[INFO] finished tweaking git repo https://github.com/EwanValentine/rust-paxos
[INFO] tweaked toml for git repo https://github.com/EwanValentine/rust-paxos written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/EwanValentine/rust-paxos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c53ec282a6cc224260480399f0960219cd05964392eac20ce28903de8042338
[INFO] running `Command { std: "docker" "start" "-a" "1c53ec282a6cc224260480399f0960219cd05964392eac20ce28903de8042338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c53ec282a6cc224260480399f0960219cd05964392eac20ce28903de8042338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c53ec282a6cc224260480399f0960219cd05964392eac20ce28903de8042338", kill_on_drop: false }`
[INFO] [stdout] 1c53ec282a6cc224260480399f0960219cd05964392eac20ce28903de8042338
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea2fc75598510119baee6dc003ad2d7a97a9f4f82d97a2a94a69db1eb03ed813
[INFO] running `Command { std: "docker" "start" "-a" "ea2fc75598510119baee6dc003ad2d7a97a9f4f82d97a2a94a69db1eb03ed813", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling waker-fn v1.0.0
[INFO] [stderr]    Compiling cache-padded v1.1.0
[INFO] [stderr]    Compiling parking v1.0.3
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling fastrand v1.3.2
[INFO] [stderr]    Compiling async-task v3.0.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.7
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling concurrent-queue v1.1.1
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling kv-log-macro v1.0.6
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling pin-project v0.4.22
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling blocking v0.4.6
[INFO] [stderr]    Compiling smol v0.1.18
[INFO] [stderr]    Compiling async-std v1.6.2
[INFO] [stderr]    Compiling paxos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/transport/tcp.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `async_std::net::ToSocketAddrs`
[INFO] [stdout]  --> src/transport/transport.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use async_std::net::ToSocketAddrs;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/transport/transport.rs:8:50
[INFO] [stdout]   |
[INFO] [stdout] 8 |   fn connect<T>(addr: String) -> std::io::Result<(T)>;
[INFO] [stdout]   |                                                  ^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/transport/transport.rs:9:62
[INFO] [stdout]   |
[INFO] [stdout] 9 |   fn connect_with_stream<T, S>(stream: S) -> std::io::Result<(T)>;
[INFO] [stdout]   |                                                              ^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/transport/transport.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |   adapter: &'a Adapter
[INFO] [stdout]    |                ^^^^^^^ help: use `dyn`: `dyn Adapter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/transport/transport.rs:25:60
[INFO] [stdout]    |
[INFO] [stdout] 25 |   pub fn connect<T>(self, addr: String) -> std::io::Result<(T)> {
[INFO] [stdout]    |                                                            ^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/transport/transport.rs:30:72
[INFO] [stdout]    |
[INFO] [stdout] 30 |   pub fn connect_with_stream<T, S>(self, stream: S) -> std::io::Result<(T)> {
[INFO] [stdout]    |                                                                        ^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `Adapter` cannot be made into an object
[INFO] [stdout]   --> src/transport/transport.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |   adapter: &'a Adapter
[INFO] [stdout]    |            ^^^^^^^^^^^ `Adapter` cannot be made into an object
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
[INFO] [stdout]   --> src/transport/transport.rs:8:6
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub trait Adapter {
[INFO] [stdout]    |           ------- this trait cannot be made into an object...
[INFO] [stdout] 8  |   fn connect<T>(addr: String) -> std::io::Result<(T)>;
[INFO] [stdout]    |      ^^^^^^^ ...because associated function `connect` has no `self` parameter
[INFO] [stdout] 9  |   fn connect_with_stream<T, S>(stream: S) -> std::io::Result<(T)>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^ ...because associated function `connect_with_stream` has no `self` parameter
[INFO] [stdout] help: consider turning `connect` into a method by giving it a `&self` argument
[INFO] [stdout]    |
[INFO] [stdout] 8  |   fn connect<T>(&self, addr: String) -> std::io::Result<(T)>;
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout] help: alternatively, consider constraining `connect` so it does not apply to trait objects
[INFO] [stdout]    |
[INFO] [stdout] 8  |   fn connect<T>(addr: String) -> std::io::Result<(T)> where Self: Sized;
[INFO] [stdout]    |                                                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider turning `connect_with_stream` into a method by giving it a `&self` argument
[INFO] [stdout]    |
[INFO] [stdout] 9  |   fn connect_with_stream<T, S>(&self, stream: S) -> std::io::Result<(T)>;
[INFO] [stdout]    |                                ^^^^^^
[INFO] [stdout] help: alternatively, consider constraining `connect_with_stream` so it does not apply to trait objects
[INFO] [stdout]    |
[INFO] [stdout] 9  |   fn connect_with_stream<T, S>(stream: S) -> std::io::Result<(T)> where Self: Sized;
[INFO] [stdout]    |                                                                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0038`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `paxos`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ea2fc75598510119baee6dc003ad2d7a97a9f4f82d97a2a94a69db1eb03ed813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea2fc75598510119baee6dc003ad2d7a97a9f4f82d97a2a94a69db1eb03ed813", kill_on_drop: false }`
[INFO] [stdout] ea2fc75598510119baee6dc003ad2d7a97a9f4f82d97a2a94a69db1eb03ed813
