[INFO] cloning repository https://github.com/nasa-playground/rust_os_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nasa-playground/rust_os_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnasa-playground%2Frust_os_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnasa-playground%2Frust_os_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ab6121f3b73d3c22d956dd87073472ed974c16d
[INFO] checking nasa-playground/rust_os_practice against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnasa-playground%2Frust_os_practice" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nasa-playground/rust_os_practice on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nasa-playground/rust_os_practice
[INFO] finished tweaking git repo https://github.com/nasa-playground/rust_os_practice
[INFO] tweaked toml for git repo https://github.com/nasa-playground/rust_os_practice written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/nasa-playground/rust_os_practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c214991abda294016fc026d1af159f42b5394f3a6b1f4683b5f3a0b073754c2f
[INFO] running `Command { std: "docker" "start" "-a" "c214991abda294016fc026d1af159f42b5394f3a6b1f4683b5f3a0b073754c2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c214991abda294016fc026d1af159f42b5394f3a6b1f4683b5f3a0b073754c2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c214991abda294016fc026d1af159f42b5394f3a6b1f4683b5f3a0b073754c2f", kill_on_drop: false }`
[INFO] [stdout] c214991abda294016fc026d1af159f42b5394f3a6b1f4683b5f3a0b073754c2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00229cc2be7e1e265da4cd4fc768c39e9373495334716eccaee5352669b8007f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "00229cc2be7e1e265da4cd4fc768c39e9373495334716eccaee5352669b8007f", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.0
[INFO] [stderr]     Checking rust_os_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> src/main.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | 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/3aedcf06b73fc36feeebca3d579e1d2a6c40acc5/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-61556e43b375c2c0.rlib
[INFO] [stdout]    = note: second definition in the local crate (`rust_os_practice`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_os_practice`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "00229cc2be7e1e265da4cd4fc768c39e9373495334716eccaee5352669b8007f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00229cc2be7e1e265da4cd4fc768c39e9373495334716eccaee5352669b8007f", kill_on_drop: false }`
[INFO] [stdout] 00229cc2be7e1e265da4cd4fc768c39e9373495334716eccaee5352669b8007f