[INFO] cloning repository https://github.com/k-start/untitled_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/k-start/untitled_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-start%2Funtitled_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-start%2Funtitled_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d111c8be7e65fe68c4fe7fa3600b913491bf2ebc
[INFO] checking k-start/untitled_os against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-start%2Funtitled_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/k-start/untitled_os on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-3/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/k-start/untitled_os
[INFO] finished tweaking git repo https://github.com/k-start/untitled_os
[INFO] tweaked toml for git repo https://github.com/k-start/untitled_os written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/k-start/untitled_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3061dbc9f9f3fc00edfbb490851b14563caa74a12e9abb77fe001b7e04a4fa74
[INFO] running `Command { std: "docker" "start" "-a" "3061dbc9f9f3fc00edfbb490851b14563caa74a12e9abb77fe001b7e04a4fa74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3061dbc9f9f3fc00edfbb490851b14563caa74a12e9abb77fe001b7e04a4fa74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3061dbc9f9f3fc00edfbb490851b14563caa74a12e9abb77fe001b7e04a4fa74", kill_on_drop: false }`
[INFO] [stdout] 3061dbc9f9f3fc00edfbb490851b14563caa74a12e9abb77fe001b7e04a4fa74
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8e5561133013f28d75a4c774a25c6accf1d882a4b7e7ba9ed8682196cbead7e
[INFO] running `Command { std: "docker" "start" "-a" "c8e5561133013f28d75a4c774a25c6accf1d882a4b7e7ba9ed8682196cbead7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86_64 v0.14.3
[INFO] [stderr]    Compiling bootloader v0.10.6
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking volatile v0.4.4
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking block_device v0.1.2
[INFO] [stderr]     Checking pc-keyboard v0.5.1
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking fat32 v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking spinning_top v0.2.4
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking linked_list_allocator v0.9.0
[INFO] [stderr]     Checking bootloader-locator v0.0.4
[INFO] [stderr]     Checking boot v0.1.0 (/opt/rustwide/workdir/boot)
[INFO] [stderr]     Checking pic8259 v0.10.1
[INFO] [stderr]     Checking untitled_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `untitled_os` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c8e5561133013f28d75a4c774a25c6accf1d882a4b7e7ba9ed8682196cbead7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8e5561133013f28d75a4c774a25c6accf1d882a4b7e7ba9ed8682196cbead7e", kill_on_drop: false }`
[INFO] [stdout] c8e5561133013f28d75a4c774a25c6accf1d882a4b7e7ba9ed8682196cbead7e