[INFO] fetching crate os-rs 0.1.3...
[INFO] checking os-rs-0.1.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate os-rs 0.1.3 into /workspace/builds/worker-52/source
[INFO] validating manifest of crates.io crate os-rs 0.1.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-52/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25ec082c6ca93b961b6eafa50c95d607e755f5bd4b9e8d32123c35bada7c19be
[INFO] running `Command { std: "docker" "start" "-a" "25ec082c6ca93b961b6eafa50c95d607e755f5bd4b9e8d32123c35bada7c19be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25ec082c6ca93b961b6eafa50c95d607e755f5bd4b9e8d32123c35bada7c19be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25ec082c6ca93b961b6eafa50c95d607e755f5bd4b9e8d32123c35bada7c19be", kill_on_drop: false }`
[INFO] [stdout] 25ec082c6ca93b961b6eafa50c95d607e755f5bd4b9e8d32123c35bada7c19be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54ae8497e2433d9cbabf9c298c44b2073b965ef77262afae1ecdde5a2f188986
[INFO] running `Command { std: "docker" "start" "-a" "54ae8497e2433d9cbabf9c298c44b2073b965ef77262afae1ecdde5a2f188986", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking 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] 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] 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[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[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] [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` due to 7 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "54ae8497e2433d9cbabf9c298c44b2073b965ef77262afae1ecdde5a2f188986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54ae8497e2433d9cbabf9c298c44b2073b965ef77262afae1ecdde5a2f188986", kill_on_drop: false }`
[INFO] [stdout] 54ae8497e2433d9cbabf9c298c44b2073b965ef77262afae1ecdde5a2f188986
