[INFO] cloning repository https://github.com/byoboo/tiny_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/byoboo/tiny_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbyoboo%2Ftiny_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbyoboo%2Ftiny_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45b151f96ad0d7748d11bee454c6afc59240949c
[INFO] checking byoboo/tiny_os against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbyoboo%2Ftiny_os" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/byoboo/tiny_os on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/byoboo/tiny_os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/byoboo/tiny_os
[INFO] tweaked toml for git repo https://github.com/byoboo/tiny_os written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/byoboo/tiny_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "linux").rustflags
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "macos").rustflags
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "windows").rustflags
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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] 536d5704a0240728068d3952102f96844273ff450ac8c1ea243e780bd4e738e2
[INFO] running `Command { std: "docker" "start" "-a" "536d5704a0240728068d3952102f96844273ff450ac8c1ea243e780bd4e738e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "536d5704a0240728068d3952102f96844273ff450ac8c1ea243e780bd4e738e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "536d5704a0240728068d3952102f96844273ff450ac8c1ea243e780bd4e738e2", kill_on_drop: false }`
[INFO] [stdout] 536d5704a0240728068d3952102f96844273ff450ac8c1ea243e780bd4e738e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dcc17e8e1808017cdaabe16f8b1bda867521c2e9973216a6d1aa796e19fe07e
[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" "3dcc17e8e1808017cdaabe16f8b1bda867521c2e9973216a6d1aa796e19fe07e", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "linux").rustflags
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "macos").rustflags
[INFO] [stderr] warning: unused manifest key: target.cfg(target_os = "windows").rustflags
[INFO] [stderr]    Compiling x86_64 v0.13.3
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]    Compiling bootloader v0.9.16
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking cpuio v0.3.0
[INFO] [stderr]     Checking pc-keyboard v0.5.1
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking pic8259_simple v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking spin v0.9.0
[INFO] [stderr]     Checking uart_16550 v0.2.12
[INFO] [stderr]     Checking tiny_os v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `gdt`
[INFO] [stdout]  --> src/interrupts.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{gdt, print, println};
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `gdt`
[INFO] [stdout]  --> src/interrupts.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{gdt, print, println};
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scancode`
[INFO] [stdout]   --> src/interrupts.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let scancode: u8 = unsafe { port.read() };
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scancode`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tiny_os`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function is never used: `double_fault_handler`
[INFO] [stdout]   --> src/interrupts.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 | extern "x86-interrupt" fn double_fault_handler(
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3dcc17e8e1808017cdaabe16f8b1bda867521c2e9973216a6d1aa796e19fe07e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dcc17e8e1808017cdaabe16f8b1bda867521c2e9973216a6d1aa796e19fe07e", kill_on_drop: false }`
[INFO] [stdout] 3dcc17e8e1808017cdaabe16f8b1bda867521c2e9973216a6d1aa796e19fe07e