[INFO] crate nitrogen 0.1.0 is already in cache
[INFO] testing nitrogen-0.1.0 against 1.45.2 for beta-1.46-1
[INFO] extracting crate nitrogen 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate nitrogen 0.1.0 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nitrogen 0.1.0
[INFO] finished tweaking crates.io crate nitrogen 0.1.0
[INFO] tweaked toml for crates.io crate nitrogen 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a76242bcc433d50ac0e8df060bd178b0a16a558b0bc435c8f0371ca4d0b82805
[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" "a76242bcc433d50ac0e8df060bd178b0a16a558b0bc435c8f0371ca4d0b82805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a76242bcc433d50ac0e8df060bd178b0a16a558b0bc435c8f0371ca4d0b82805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a76242bcc433d50ac0e8df060bd178b0a16a558b0bc435c8f0371ca4d0b82805", kill_on_drop: false }`
[INFO] [stdout] a76242bcc433d50ac0e8df060bd178b0a16a558b0bc435c8f0371ca4d0b82805
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 365d08ad39c30b87a3716189b48af39256e8269f9c7f39b0a734c57352f61f91
[INFO] running `Command { std: "docker" "start" "-a" "365d08ad39c30b87a3716189b48af39256e8269f9c7f39b0a734c57352f61f91", kill_on_drop: false }`
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling structopt v0.2.18
[INFO] [stderr]    Compiling inotify v0.8.3
[INFO] [stderr]    Compiling notify v5.0.0-pre.3
[INFO] [stderr]    Compiling nitrogen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:11:64
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn really_complicated_code(a: u8, b: u8) -> Result<u8, Box<Error>> {
[INFO] [stdout]    |                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `new` found for trait object `dyn file_watcher::notify::Watcher` in the current scope
[INFO] [stdout]   --> src/bin/nitrogen/file_watcher.rs:11:52
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(4))?;
[INFO] [stdout]    |                                                    ^^^ function or associated item not found in `dyn file_watcher::notify::Watcher`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/bin/nitrogen/file_watcher.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     loop {
[INFO] [stdout] 16 | |         match rx.recv() {
[INFO] [stdout] 17 | |             Ok(event) => println!("changed: {:?}", event),
[INFO] [stdout] 18 | |             Err(err) => println!("watch error: {:?}", err),
[INFO] [stdout] 19 | |         };
[INFO] [stdout] 20 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 21 | 
[INFO] [stdout] 22 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nitrogen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "365d08ad39c30b87a3716189b48af39256e8269f9c7f39b0a734c57352f61f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "365d08ad39c30b87a3716189b48af39256e8269f9c7f39b0a734c57352f61f91", kill_on_drop: false }`
[INFO] [stdout] 365d08ad39c30b87a3716189b48af39256e8269f9c7f39b0a734c57352f61f91