[INFO] cloning repository https://github.com/joaoh82/os_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joaoh82/os_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaoh82%2Fos_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaoh82%2Fos_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a59cf2a93fe1ebbd3fb3ea0821d2e41681962dbf
[INFO] checking joaoh82/os_rust against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaoh82%2Fos_rust" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joaoh82/os_rust on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/joaoh82/os_rust
[INFO] finished tweaking git repo https://github.com/joaoh82/os_rust
[INFO] tweaked toml for git repo https://github.com/joaoh82/os_rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/joaoh82/os_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c47c90ac5ee055846cec8421406e04c1dab89788514968db0a7005f025f744d
[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" "5c47c90ac5ee055846cec8421406e04c1dab89788514968db0a7005f025f744d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c47c90ac5ee055846cec8421406e04c1dab89788514968db0a7005f025f744d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c47c90ac5ee055846cec8421406e04c1dab89788514968db0a7005f025f744d", kill_on_drop: false }`
[INFO] [stdout] 5c47c90ac5ee055846cec8421406e04c1dab89788514968db0a7005f025f744d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 2133c343f9afcac29d04d196f7ff267e99612f5639bd090667b76e2be67ca8c7
[INFO] running `Command { std: "docker" "start" "-a" "2133c343f9afcac29d04d196f7ff267e99612f5639bd090667b76e2be67ca8c7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bootloader v0.9.16
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking os_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `write_string`
[INFO] [stdout]    --> src/vga_buffer.rs:106:12
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn write_string(&mut self, string_data: &str) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `PRINT_MESSAGE`
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | static PRINT_MESSAGE: &[u8] = b"WELCOME TO THE POLYGLOT PROGRAMMER OS";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn panic(_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/c5fbcd35a8217a17f6b63a22217ace06cf8f5f02/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-363511a59ca6fedb.rlib
[INFO] [stdout]    = note: second definition in the local crate (`os_rust`)
[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 `os_rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2133c343f9afcac29d04d196f7ff267e99612f5639bd090667b76e2be67ca8c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2133c343f9afcac29d04d196f7ff267e99612f5639bd090667b76e2be67ca8c7", kill_on_drop: false }`
[INFO] [stdout] 2133c343f9afcac29d04d196f7ff267e99612f5639bd090667b76e2be67ca8c7