[INFO] fetching crate os-rs 0.1.3...
[INFO] testing os-rs-0.1.3 against 1.54.0 for beta-1.55-1
[INFO] extracting crate os-rs 0.1.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate os-rs 0.1.3 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 crates.io crate os-rs 0.1.3
[INFO] finished tweaking crates.io crate os-rs 0.1.3
[INFO] tweaked toml for crates.io crate os-rs 0.1.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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" "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] ed7af84f1c5a4cf54ab143b66740dc341dff5e72c4c2b7cb990711e053a761d4
[INFO] running `Command { std: "docker" "start" "-a" "ed7af84f1c5a4cf54ab143b66740dc341dff5e72c4c2b7cb990711e053a761d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed7af84f1c5a4cf54ab143b66740dc341dff5e72c4c2b7cb990711e053a761d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed7af84f1c5a4cf54ab143b66740dc341dff5e72c4c2b7cb990711e053a761d4", kill_on_drop: false }`
[INFO] [stdout] ed7af84f1c5a4cf54ab143b66740dc341dff5e72c4c2b7cb990711e053a761d4
[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" "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] be331ad52e9491bd9d5c0bfc8c61fed2c3378bef317b6580f866262925b35fe6
[INFO] running `Command { std: "docker" "start" "-a" "be331ad52e9491bd9d5c0bfc8c61fed2c3378bef317b6580f866262925b35fe6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling os-rs v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]   --> src/lib.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     None(std::option::NoneError),
[INFO] [stdout]    |                       ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]   --> src/lib.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl From<std::option::NoneError> for Error {
[INFO] [stdout]    |                        ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]   --> src/lib.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn from(error: std::option::NoneError) -> Self {
[INFO] [stdout]    |                                 ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io`
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     io,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:53:47
[INFO] [stdout]    |
[INFO] [stdout] 53 |     Command::new(command).args(args).output().map_err(Error::from)
[INFO] [stdout]    |                                               ^^^^^^^ cannot infer type for type parameter `O` declared on the associated function `map_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]   --> src/lib.rs:78:24
[INFO] [stdout]    |
[INFO] [stdout] 73 | /         fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout] 74 | |             let running = s.contains("is rus?nning");
[INFO] [stdout] 75 | |             let pid = s.trim_matches(|p: char| !p.is_numeric()).parse().ok();
[INFO] [stdout] 76 | |             let name = s
[INFO] [stdout] 77 | |                 .split(' ')
[INFO] [stdout] 78 | |                 .next()?
[INFO] [stdout]    | |                        ^ use `.ok_or(...)?` to provide an error compatible with `std::result::Result<Status, Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 81 | |             Ok(Self { name, pid, running })
[INFO] [stdout] 82 | |         }
[INFO] [stdout]    | |_________- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `std::result::Result<Status, Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0282, E0412, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `os-rs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "be331ad52e9491bd9d5c0bfc8c61fed2c3378bef317b6580f866262925b35fe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be331ad52e9491bd9d5c0bfc8c61fed2c3378bef317b6580f866262925b35fe6", kill_on_drop: false }`
[INFO] [stdout] be331ad52e9491bd9d5c0bfc8c61fed2c3378bef317b6580f866262925b35fe6
