[INFO] cloning repository https://github.com/hj-core/xv6-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hj-core/xv6-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhj-core%2Fxv6-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhj-core%2Fxv6-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08c970f222e9024b2dc88b90d8b34efd9f47d4fc
[INFO] checking hj-core/xv6-rs against master#b44e14f762fd4062faeba97f8f2bc470298ec1ac for pr-135331
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhj-core%2Fxv6-rs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hj-core/xv6-rs on toolchain b44e14f762fd4062faeba97f8f2bc470298ec1ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b44e14f762fd4062faeba97f8f2bc470298ec1ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/hj-core/xv6-rs
[INFO] finished tweaking git repo https://github.com/hj-core/xv6-rs
[INFO] tweaked toml for git repo https://github.com/hj-core/xv6-rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hj-core/xv6-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b44e14f762fd4062faeba97f8f2bc470298ec1ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+b44e14f762fd4062faeba97f8f2bc470298ec1ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4bdd781e1ff20c0b3613d3516c4d5979ea3a1e77238ca7a054f3f29e66b5ef76
[INFO] running `Command { std: "docker" "start" "-a" "4bdd781e1ff20c0b3613d3516c4d5979ea3a1e77238ca7a054f3f29e66b5ef76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bdd781e1ff20c0b3613d3516c4d5979ea3a1e77238ca7a054f3f29e66b5ef76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bdd781e1ff20c0b3613d3516c4d5979ea3a1e77238ca7a054f3f29e66b5ef76", kill_on_drop: false }`
[INFO] [stdout] 4bdd781e1ff20c0b3613d3516c4d5979ea3a1e77238ca7a054f3f29e66b5ef76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+b44e14f762fd4062faeba97f8f2bc470298ec1ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3546c445c4a0780c5c5e9700e6db242a15c81222c0de41e9b6a53e7614b8ba5
[INFO] running `Command { std: "docker" "start" "-a" "f3546c445c4a0780c5c5e9700e6db242a15c81222c0de41e9b6a53e7614b8ba5", kill_on_drop: false }`
[INFO] [stderr]    Compiling kernel v0.1.0 (/opt/rustwide/workdir/kernel)
[INFO] [stderr]     Checking wrapper v0.1.0 (/opt/rustwide/workdir/wrapper)
[INFO] [stderr]     Checking hw v0.1.0 (/opt/rustwide/workdir/hw)
[INFO] [stdout] error[E0601]: `main` function not found in crate `kernel`
[INFO] [stdout]    --> kernel/src/main.rs:106:2
[INFO] [stdout]     |
[INFO] [stdout] 106 | }
[INFO] [stdout]     |  ^ consider adding a `main` function to `kernel/src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kernel` (bin "kernel") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f3546c445c4a0780c5c5e9700e6db242a15c81222c0de41e9b6a53e7614b8ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3546c445c4a0780c5c5e9700e6db242a15c81222c0de41e9b6a53e7614b8ba5", kill_on_drop: false }`
[INFO] [stdout] f3546c445c4a0780c5c5e9700e6db242a15c81222c0de41e9b6a53e7614b8ba5