[INFO] cloning repository https://github.com/SybelBlue/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/SybelBlue/rust_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSybelBlue%2Frust_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSybelBlue%2Frust_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db88596cd3cda0e0afda1b2189f4f9b870847284
[INFO] checking SybelBlue/rust_os against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSybelBlue%2Frust_os" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SybelBlue/rust_os on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-10/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/SybelBlue/rust_os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/SybelBlue/rust_os
[INFO] tweaked toml for git repo https://github.com/SybelBlue/rust_os written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/SybelBlue/rust_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pic8259 v0.10.1
[INFO] [stderr]   Downloaded linked_list_allocator v0.9.0
[INFO] [stderr]   Downloaded bootloader v0.9.18
[INFO] [stderr]   Downloaded uart_16550 v0.2.15
[INFO] [stderr]   Downloaded x86_64 v0.14.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e8a465d5e78e24134c83080e699751999ff411b4447b514b907915d8f17683f
[INFO] running `Command { std: "docker" "start" "-a" "3e8a465d5e78e24134c83080e699751999ff411b4447b514b907915d8f17683f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e8a465d5e78e24134c83080e699751999ff411b4447b514b907915d8f17683f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e8a465d5e78e24134c83080e699751999ff411b4447b514b907915d8f17683f", kill_on_drop: false }`
[INFO] [stdout] 3e8a465d5e78e24134c83080e699751999ff411b4447b514b907915d8f17683f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14f6c070606ed3d7db74e094749574b28af187f9746692cb05f4000795c58514
[INFO] running `Command { std: "docker" "start" "-a" "14f6c070606ed3d7db74e094749574b28af187f9746692cb05f4000795c58514", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.14.3
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking volatile v0.4.4
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling bootloader v0.9.18
[INFO] [stderr]     Checking pc-keyboard v0.5.1
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking spinning_top v0.2.4
[INFO] [stderr]     Checking linked_list_allocator v0.9.0
[INFO] [stderr]     Checking uart_16550 v0.2.15
[INFO] [stderr]     Checking pic8259 v0.10.1
[INFO] [stderr]     Checking rust_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_os` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct is never constructed: `ListNode`
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct ListNode {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BLOCK_SIZES`
[INFO] [stdout]  --> src/allocator/fixed_size_block.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const BLOCK_SIZES: &[usize] = &[8, 16, 32, 128, 256, 512, 1024, 2048];
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "14f6c070606ed3d7db74e094749574b28af187f9746692cb05f4000795c58514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14f6c070606ed3d7db74e094749574b28af187f9746692cb05f4000795c58514", kill_on_drop: false }`
[INFO] [stdout] 14f6c070606ed3d7db74e094749574b28af187f9746692cb05f4000795c58514