[INFO] cloning repository https://github.com/ShallowFeather/a-Hello-world-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShallowFeather/a-Hello-world-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShallowFeather%2Fa-Hello-world-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShallowFeather%2Fa-Hello-world-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a32fd2ae09966585193f6f7b437a9faffb7174b3
[INFO] checking ShallowFeather/a-Hello-world-os against try#7c3a44cf5f95fa5cf164a312bdcf845157af7093 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShallowFeather%2Fa-Hello-world-os" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShallowFeather/a-Hello-world-os on toolchain 7c3a44cf5f95fa5cf164a312bdcf845157af7093
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShallowFeather/a-Hello-world-os
[INFO] finished tweaking git repo https://github.com/ShallowFeather/a-Hello-world-os
[INFO] tweaked toml for git repo https://github.com/ShallowFeather/a-Hello-world-os written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ShallowFeather/a-Hello-world-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bootloader v0.10.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f38e1060e8919aef53bd9f7653dfd5cd04c19063d9e3cca6b8791aa61086271
[INFO] running `Command { std: "docker" "start" "-a" "8f38e1060e8919aef53bd9f7653dfd5cd04c19063d9e3cca6b8791aa61086271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f38e1060e8919aef53bd9f7653dfd5cd04c19063d9e3cca6b8791aa61086271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f38e1060e8919aef53bd9f7653dfd5cd04c19063d9e3cca6b8791aa61086271", kill_on_drop: false }`
[INFO] [stdout] 8f38e1060e8919aef53bd9f7653dfd5cd04c19063d9e3cca6b8791aa61086271
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70f0d498ec9e1c46a696dde746da44dd79ccaeddce01b09571f7d9a764f9bbc4
[INFO] running `Command { std: "docker" "start" "-a" "70f0d498ec9e1c46a696dde746da44dd79ccaeddce01b09571f7d9a764f9bbc4", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.10.4
[INFO] [stderr]     Checking Rust-kernel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate `Rust_kernel` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_kernel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `hello` should have an upper case name
[INFO] [stdout]   --> src/main.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const hello: &[u8] = b"hello world";
[INFO] [stdout]    |       ^^^^^ help: convert the identifier to upper case: `HELLO`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]   = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/7c3a44cf5f95fa5cf164a312bdcf845157af7093/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-21256c14e4504640.rlib
[INFO] [stdout]   = note: second definition in the local crate (`Rust_kernel`)
[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 E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Rust-kernel`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "70f0d498ec9e1c46a696dde746da44dd79ccaeddce01b09571f7d9a764f9bbc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f0d498ec9e1c46a696dde746da44dd79ccaeddce01b09571f7d9a764f9bbc4", kill_on_drop: false }`
[INFO] [stdout] 70f0d498ec9e1c46a696dde746da44dd79ccaeddce01b09571f7d9a764f9bbc4