[INFO] cloning repository https://github.com/itsbth/Rust_OS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/itsbth/Rust_OS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsbth%2FRust_OS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsbth%2FRust_OS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6ead62aae994d4a6c2f453b7de7d79dd8fe2b73
[INFO] checking itsbth/Rust_OS against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsbth%2FRust_OS" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itsbth/Rust_OS on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/itsbth/Rust_OS
[INFO] finished tweaking git repo https://github.com/itsbth/Rust_OS
[INFO] tweaked toml for git repo https://github.com/itsbth/Rust_OS written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/itsbth/Rust_OS already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.3.4
[INFO] [stderr]   Downloaded rlibc v0.1.4
[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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0baebc7c1a54d46f65bfd7e6bf93f0294faceb0b860aef568649ebd3f1e65425
[INFO] running `Command { std: "docker" "start" "-a" "0baebc7c1a54d46f65bfd7e6bf93f0294faceb0b860aef568649ebd3f1e65425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0baebc7c1a54d46f65bfd7e6bf93f0294faceb0b860aef568649ebd3f1e65425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0baebc7c1a54d46f65bfd7e6bf93f0294faceb0b860aef568649ebd3f1e65425", kill_on_drop: false }`
[INFO] [stdout] 0baebc7c1a54d46f65bfd7e6bf93f0294faceb0b860aef568649ebd3f1e65425
[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" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99f0c694e07bc12f88c86365e576da2bbf8fc95abfa97139055d8d829f808810
[INFO] running `Command { std: "docker" "start" "-a" "99f0c694e07bc12f88c86365e576da2bbf8fc95abfa97139055d8d829f808810", kill_on_drop: false }`
[INFO] [stderr]     Checking rlibc v0.1.4
[INFO] [stderr]     Checking spin v0.3.4
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.3.4/src/lib.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(no_std, const_fn)]
[INFO] [stdout]   |                    ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin`
[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" "99f0c694e07bc12f88c86365e576da2bbf8fc95abfa97139055d8d829f808810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99f0c694e07bc12f88c86365e576da2bbf8fc95abfa97139055d8d829f808810", kill_on_drop: false }`
[INFO] [stdout] 99f0c694e07bc12f88c86365e576da2bbf8fc95abfa97139055d8d829f808810