[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] testing SybelBlue/rust_os against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSybelBlue%2Frust_os" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SybelBlue/rust_os on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-12/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-12/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uart_16550 v0.2.15
[INFO] [stderr]   Downloaded bootloader v0.9.18
[INFO] [stderr]   Downloaded x86_64 v0.14.3
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] [stderr]   Downloaded pic8259 v0.10.1
[INFO] [stderr]   Downloaded linked_list_allocator v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22e9ca26f96d087dea1068889a74fe0f8409785a4ea8fe792de134c7cfe9bd43
[INFO] running `Command { std: "docker" "start" "-a" "22e9ca26f96d087dea1068889a74fe0f8409785a4ea8fe792de134c7cfe9bd43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22e9ca26f96d087dea1068889a74fe0f8409785a4ea8fe792de134c7cfe9bd43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22e9ca26f96d087dea1068889a74fe0f8409785a4ea8fe792de134c7cfe9bd43", kill_on_drop: false }`
[INFO] [stdout] 22e9ca26f96d087dea1068889a74fe0f8409785a4ea8fe792de134c7cfe9bd43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74e3c289992ae83daa7e5bf4c03dd758acce686d12acfd4d879c74bff9c895ce
[INFO] running `Command { std: "docker" "start" "-a" "74e3c289992ae83daa7e5bf4c03dd758acce686d12acfd4d879c74bff9c895ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.14.3
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling bootloader v0.9.18
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling pc-keyboard v0.5.1
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling spinning_top v0.2.4
[INFO] [stderr]    Compiling linked_list_allocator v0.9.0
[INFO] [stderr]    Compiling uart_16550 v0.2.15
[INFO] [stderr]    Compiling pic8259 v0.10.1
[INFO] [stderr]    Compiling rust_os v0.1.0 (/opt/rustwide/workdir)
[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] [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] running `Command { std: "docker" "inspect" "74e3c289992ae83daa7e5bf4c03dd758acce686d12acfd4d879c74bff9c895ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74e3c289992ae83daa7e5bf4c03dd758acce686d12acfd4d879c74bff9c895ce", kill_on_drop: false }`
[INFO] [stdout] 74e3c289992ae83daa7e5bf4c03dd758acce686d12acfd4d879c74bff9c895ce