[INFO] fetching crate os-rs 0.1.3...
[INFO] testing os-rs-0.1.3 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[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 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 046de34306d3470b8406876cff292408001d06654bd585b7216446f948103657
[INFO] running `Command { std: "docker" "start" "-a" "046de34306d3470b8406876cff292408001d06654bd585b7216446f948103657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "046de34306d3470b8406876cff292408001d06654bd585b7216446f948103657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "046de34306d3470b8406876cff292408001d06654bd585b7216446f948103657", kill_on_drop: false }`
[INFO] [stdout] 046de34306d3470b8406876cff292408001d06654bd585b7216446f948103657
[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=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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ab40bc51bf9a41ae438f348f852e49cd362ba5cbb05dd8d4669fbd2f6e16a95
[INFO] running `Command { std: "docker" "start" "-a" "5ab40bc51bf9a41ae438f348f852e49cd362ba5cbb05dd8d4669fbd2f6e16a95", kill_on_drop: false }`
[INFO] [stderr]    Compiling os-rs v0.1.3 (/opt/rustwide/workdir)
[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[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 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this 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" "5ab40bc51bf9a41ae438f348f852e49cd362ba5cbb05dd8d4669fbd2f6e16a95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ab40bc51bf9a41ae438f348f852e49cd362ba5cbb05dd8d4669fbd2f6e16a95", kill_on_drop: false }`
[INFO] [stdout] 5ab40bc51bf9a41ae438f348f852e49cd362ba5cbb05dd8d4669fbd2f6e16a95