[INFO] cloning repository https://github.com/Persona036/rustos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Persona036/rustos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPersona036%2Frustos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPersona036%2Frustos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 385609fbfb8930c315c06b8f7d70e142778374d5
[INFO] checking Persona036/rustos against try#af54b6062f33b99e418444700f3a823ef0214052 for pr-138952
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPersona036%2Frustos" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Persona036/rustos on toolchain af54b6062f33b99e418444700f3a823ef0214052
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Persona036/rustos
[INFO] finished tweaking git repo https://github.com/Persona036/rustos
[INFO] tweaked toml for git repo https://github.com/Persona036/rustos written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Persona036/rustos 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" "+af54b6062f33b99e418444700f3a823ef0214052" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5244b13560f280e3437813a78b9e5c437bb38214c66d8dae8762a6d54cb206e0
[INFO] running `Command { std: "docker" "start" "-a" "5244b13560f280e3437813a78b9e5c437bb38214c66d8dae8762a6d54cb206e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5244b13560f280e3437813a78b9e5c437bb38214c66d8dae8762a6d54cb206e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5244b13560f280e3437813a78b9e5c437bb38214c66d8dae8762a6d54cb206e0", kill_on_drop: false }`
[INFO] [stdout] 5244b13560f280e3437813a78b9e5c437bb38214c66d8dae8762a6d54cb206e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4a8f3f5f7ed7ebd870d92b67c402ca0d352b5cf797f0b800afeab522c828a23
[INFO] running `Command { std: "docker" "start" "-a" "c4a8f3f5f7ed7ebd870d92b67c402ca0d352b5cf797f0b800afeab522c828a23", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.23
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rustos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout] 21 | |     println!("{}", info);
[INFO] [stdout] 22 | |     loop {}
[INFO] [stdout] 23 | | }
[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/af54b6062f33b99e418444700f3a823ef0214052/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-08d24c853dfa6028.rlib
[INFO] [stdout]    = note: second definition in the local crate (`rustos`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 13 |  panic!("panic message");
[INFO] [stdout]    |  ----------------------- any code following this expression is unreachable
[INFO] [stdout] 14 | loop{}
[INFO] [stdout]    | ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustos` (bin "rustos" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c4a8f3f5f7ed7ebd870d92b67c402ca0d352b5cf797f0b800afeab522c828a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4a8f3f5f7ed7ebd870d92b67c402ca0d352b5cf797f0b800afeab522c828a23", kill_on_drop: false }`
[INFO] [stdout] c4a8f3f5f7ed7ebd870d92b67c402ca0d352b5cf797f0b800afeab522c828a23