[INFO] cloning repository https://github.com/Roshaen/minimal-rust-kernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Roshaen/minimal-rust-kernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoshaen%2Fminimal-rust-kernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoshaen%2Fminimal-rust-kernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d7e80f49f17786bffa0cd32567702b45c4b2145
[INFO] checking Roshaen/minimal-rust-kernel against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRoshaen%2Fminimal-rust-kernel" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Roshaen/minimal-rust-kernel on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Roshaen/minimal-rust-kernel
[INFO] finished tweaking git repo https://github.com/Roshaen/minimal-rust-kernel
[INFO] tweaked toml for git repo https://github.com/Roshaen/minimal-rust-kernel written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Roshaen/minimal-rust-kernel 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" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "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 bootloader v0.9.27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6bfb35b233428344a94ed8018d577fc4d3c83bb016e0dbf19265e515c054fdd
[INFO] running `Command { std: "docker" "start" "-a" "b6bfb35b233428344a94ed8018d577fc4d3c83bb016e0dbf19265e515c054fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6bfb35b233428344a94ed8018d577fc4d3c83bb016e0dbf19265e515c054fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6bfb35b233428344a94ed8018d577fc4d3c83bb016e0dbf19265e515c054fdd", kill_on_drop: false }`
[INFO] [stdout] b6bfb35b233428344a94ed8018d577fc4d3c83bb016e0dbf19265e515c054fdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a13eeb7f66316163cefea3ecc797100b1abfb5a9f4337ddd6afc18423bb3bdd8
[INFO] running `Command { std: "docker" "start" "-a" "a13eeb7f66316163cefea3ecc797100b1abfb5a9f4337ddd6afc18423bb3bdd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.27
[INFO] [stderr]     Checking rust_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | / fn panic(_info: &PanicInfo) -> ! {
[INFO] [stdout] 30 | |     loop {}
[INFO] [stdout] 31 | | }
[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/901e6d56697c79b2e80df6a487b2318ec6f57ee3/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-46e6f64400db96b9.rlib
[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" "a13eeb7f66316163cefea3ecc797100b1abfb5a9f4337ddd6afc18423bb3bdd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a13eeb7f66316163cefea3ecc797100b1abfb5a9f4337ddd6afc18423bb3bdd8", kill_on_drop: false }`
[INFO] [stdout] a13eeb7f66316163cefea3ecc797100b1abfb5a9f4337ddd6afc18423bb3bdd8