[INFO] cloning repository https://github.com/BigBillZhao/xv6-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BigBillZhao/xv6-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigBillZhao%2Fxv6-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigBillZhao%2Fxv6-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90dd3816def980313ad2b7b63649f1c9d502216c
[INFO] testing BigBillZhao/xv6-rust against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigBillZhao%2Fxv6-rust" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
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Updating files: 100% (47/47), done.
[INFO] validating manifest of git repo https://github.com/BigBillZhao/xv6-rust on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-78/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-78/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/BigBillZhao/xv6-rust
[INFO] finished tweaking git repo https://github.com/BigBillZhao/xv6-rust
[INFO] tweaked toml for git repo https://github.com/BigBillZhao/xv6-rust written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate git repo https://github.com/BigBillZhao/xv6-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array-macro v2.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9aacc2a1b43f6cad36553f046cdc064fc0c64ec8d659a6d26aaf82074be36a5b
[INFO] running `Command { std: "docker" "start" "-a" "9aacc2a1b43f6cad36553f046cdc064fc0c64ec8d659a6d26aaf82074be36a5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9aacc2a1b43f6cad36553f046cdc064fc0c64ec8d659a6d26aaf82074be36a5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9aacc2a1b43f6cad36553f046cdc064fc0c64ec8d659a6d26aaf82074be36a5b", kill_on_drop: false }`
[INFO] [stdout] 9aacc2a1b43f6cad36553f046cdc064fc0c64ec8d659a6d26aaf82074be36a5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64f6f88897584ad95d2e7806595259789af4b597ffd38a5cc2a85608423ed986
[INFO] running `Command { std: "docker" "start" "-a" "64f6f88897584ad95d2e7806595259789af4b597ffd38a5cc2a85608423ed986", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling spin v0.4.10
[INFO] [stderr]    Compiling array-macro v2.0.0
[INFO] [stderr]    Compiling bit_field v0.10.1
[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: 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` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "64f6f88897584ad95d2e7806595259789af4b597ffd38a5cc2a85608423ed986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64f6f88897584ad95d2e7806595259789af4b597ffd38a5cc2a85608423ed986", kill_on_drop: false }`
[INFO] [stdout] 64f6f88897584ad95d2e7806595259789af4b597ffd38a5cc2a85608423ed986