[INFO] cloning repository https://github.com/dermotfrost/rust_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dermotfrost/rust_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermotfrost%2Frust_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermotfrost%2Frust_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e03adf09185e3d2b0d00348506623a8b70f434d4
[INFO] checking dermotfrost/rust_os against e5e97e3ef0ee95d34bea49cdac051ed1bbac01df for pr-158759-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdermotfrost%2Frust_os" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/dermotfrost/rust_os
[INFO] finished tweaking git repo https://github.com/dermotfrost/rust_os
[INFO] tweaked toml for git repo https://github.com/dermotfrost/rust_os written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dermotfrost/rust_os on toolchain e5e97e3ef0ee95d34bea49cdac051ed1bbac01df
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e5e97e3ef0ee95d34bea49cdac051ed1bbac01df" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dermotfrost/rust_os 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" "+e5e97e3ef0ee95d34bea49cdac051ed1bbac01df" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b
[INFO] running `Command { std: "docker" "start" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b" "/opt/rustwide/cargo-home/bin/cargo" "+e5e97e3ef0ee95d34bea49cdac051ed1bbac01df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b" "/opt/rustwide/cargo-home/bin/cargo" "+e5e97e3ef0ee95d34bea49cdac051ed1bbac01df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.17
[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 rust_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `print_something` is never used
[INFO] [stdout]    --> src/vga_buffer.rs:122:8
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn print_something() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stdout] 28 | |     println!("{}", info);
[INFO] [stdout] 29 | |     loop {}
[INFO] [stdout] 30 | | }
[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/e5e97e3ef0ee95d34bea49cdac051ed1bbac01df/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-ebc3593764c44f83.rmeta
[INFO] [stdout]    = note: second definition in the local crate (`rust_os`)
[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_os` (bin "rust_os" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b", kill_on_drop: false }`
[INFO] [stdout] 9e9b09074a69b4d967f2b29bbb17d6d8fcb897029b4b4ce29437e62b203d789b