[INFO] fetching crate paxos-rust 0.2.0...
[INFO] checking paxos-rust-0.2.0 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate paxos-rust 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate paxos-rust 0.2.0 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate paxos-rust 0.2.0
[INFO] finished tweaking crates.io crate paxos-rust 0.2.0
[INFO] tweaked toml for crates.io crate paxos-rust 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2e615eb6d49073b9b00d14c9db98aebbb3db0a55dcaa649588f856c259c0e76
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d2e615eb6d49073b9b00d14c9db98aebbb3db0a55dcaa649588f856c259c0e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2e615eb6d49073b9b00d14c9db98aebbb3db0a55dcaa649588f856c259c0e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2e615eb6d49073b9b00d14c9db98aebbb3db0a55dcaa649588f856c259c0e76", kill_on_drop: false }`
[INFO] [stdout] d2e615eb6d49073b9b00d14c9db98aebbb3db0a55dcaa649588f856c259c0e76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c61980392d83b6f7a1ea4876b2074fd1d11352bd60113c0e573e620c065d1aa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2c61980392d83b6f7a1ea4876b2074fd1d11352bd60113c0e573e620c065d1aa", kill_on_drop: false }`
[INFO] [stderr]     Checking paxos-rust v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/acceptor.rs:18:31
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/learner.rs:19:31
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[INFO] [stdout]    |
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/proposer.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[INFO] [stdout]    |
[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] error: attribute must be of the form `#[test]`
[INFO] [stdout]    --> src/learner.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 |     #[test(should_panic)]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(ill_formed_attribute_input)]` 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 a future release!
[INFO] [stdout]     = note: for more information, see issue #57571 <https://github.com/rust-lang/rust/issues/57571>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/acceptor.rs:18:31
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/learner.rs:19:31
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[INFO] [stdout]    |
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/proposer.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub messenger: Option<Box<Messenger<T>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Messenger<T>`
[INFO] [stdout]    |
[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] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `paxos-rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2c61980392d83b6f7a1ea4876b2074fd1d11352bd60113c0e573e620c065d1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c61980392d83b6f7a1ea4876b2074fd1d11352bd60113c0e573e620c065d1aa", kill_on_drop: false }`
[INFO] [stdout] 2c61980392d83b6f7a1ea4876b2074fd1d11352bd60113c0e573e620c065d1aa