[INFO] cloning repository https://github.com/swidoff/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/swidoff/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4617662046169e4a624fa53c47de883c5dd9a4fe
[INFO] checking swidoff/rust-os against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswidoff%2Frust-os" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/swidoff/rust-os on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5/source/.cargo/config
[INFO] started tweaking git repo https://github.com/swidoff/rust-os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/swidoff/rust-os
[INFO] tweaked toml for git repo https://github.com/swidoff/rust-os written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/swidoff/rust-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fc5069a2883acffdd4ac0a0a938aea789b13c8eef065eadd91c587d54f4aba7
[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" "0fc5069a2883acffdd4ac0a0a938aea789b13c8eef065eadd91c587d54f4aba7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fc5069a2883acffdd4ac0a0a938aea789b13c8eef065eadd91c587d54f4aba7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc5069a2883acffdd4ac0a0a938aea789b13c8eef065eadd91c587d54f4aba7", kill_on_drop: false }`
[INFO] [stdout] 0fc5069a2883acffdd4ac0a0a938aea789b13c8eef065eadd91c587d54f4aba7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] e4f5cdb4cc891f90cd562502e31751fb096794625a7936d2519d6acd3b5cc2dd
[INFO] running `Command { std: "docker" "start" "-a" "e4f5cdb4cc891f90cd562502e31751fb096794625a7936d2519d6acd3b5cc2dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling x86_64 v0.11.1
[INFO] [stderr]    Compiling bootloader v0.9.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking conquer-util v0.2.0
[INFO] [stderr]     Checking cpuio v0.3.0
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking volatile v0.2.6
[INFO] [stderr]     Checking pc-keyboard v0.5.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking pic8259_simple v0.2.0
[INFO] [stderr]     Checking conquer-once v0.2.0
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking spinning_top v0.1.0
[INFO] [stderr]     Checking linked_list_allocator v0.8.4
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking uart_16550 v0.2.7
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking rust-os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `hlt`
[INFO] [stdout]   --> src/task/executor.rs:39:36
[INFO] [stdout]    |
[INFO] [stdout] 39 |         use x86_64::instructions::{hlt, interrupts};
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hlt`
[INFO] [stdout]   --> src/task/executor.rs:39:36
[INFO] [stdout]    |
[INFO] [stdout] 39 |         use x86_64::instructions::{hlt, interrupts};
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hlt`
[INFO] [stdout]   --> src/task/executor.rs:39:36
[INFO] [stdout]    |
[INFO] [stdout] 39 |         use x86_64::instructions::{hlt, interrupts};
[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] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e4f5cdb4cc891f90cd562502e31751fb096794625a7936d2519d6acd3b5cc2dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4f5cdb4cc891f90cd562502e31751fb096794625a7936d2519d6acd3b5cc2dd", kill_on_drop: false }`
[INFO] [stdout] e4f5cdb4cc891f90cd562502e31751fb096794625a7936d2519d6acd3b5cc2dd