[INFO] cloning repository https://github.com/ltearno/arn_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ltearno/arn_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltearno%2Farn_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltearno%2Farn_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eee2de40aaa24f6e86f33d48b79ef6e6f74b65d3
[INFO] testing ltearno/arn_os against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fltearno%2Farn_os" "/workspace/builds/worker-38/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-38/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ltearno/arn_os 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] removed /workspace/builds/worker-38/source/.cargo/config
[INFO] started tweaking git repo https://github.com/ltearno/arn_os
[INFO] finished tweaking git repo https://github.com/ltearno/arn_os
[INFO] tweaked toml for git repo https://github.com/ltearno/arn_os written to /workspace/builds/worker-38/source/Cargo.toml
[INFO] crate git repo https://github.com/ltearno/arn_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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] 16d6340794c3fb1f52d21983c5707fe03b132fe58b7f9df42e86ddad5f28599d
[INFO] running `Command { std: "docker" "start" "-a" "16d6340794c3fb1f52d21983c5707fe03b132fe58b7f9df42e86ddad5f28599d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16d6340794c3fb1f52d21983c5707fe03b132fe58b7f9df42e86ddad5f28599d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16d6340794c3fb1f52d21983c5707fe03b132fe58b7f9df42e86ddad5f28599d", kill_on_drop: false }`
[INFO] [stdout] 16d6340794c3fb1f52d21983c5707fe03b132fe58b7f9df42e86ddad5f28599d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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] c78977611f02f13d3625dfe78b924b5789dfbd164dd20e643b36c6f7bb8a9eca
[INFO] running `Command { std: "docker" "start" "-a" "c78977611f02f13d3625dfe78b924b5789dfbd164dd20e643b36c6f7bb8a9eca", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling ux v0.1.3
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling spin v0.4.10
[INFO] [stderr]    Compiling array-init v0.0.4
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.10/src/lib.rs:6:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(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[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.10/src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[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" "c78977611f02f13d3625dfe78b924b5789dfbd164dd20e643b36c6f7bb8a9eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c78977611f02f13d3625dfe78b924b5789dfbd164dd20e643b36c6f7bb8a9eca", kill_on_drop: false }`
[INFO] [stdout] c78977611f02f13d3625dfe78b924b5789dfbd164dd20e643b36c6f7bb8a9eca
