[INFO] cloning repository https://github.com/usagrada/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/usagrada/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusagrada%2Frust-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusagrada%2Frust-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6e6b2ae5186ee9f9648bdc50bd720f8c025ab43
[INFO] testing usagrada/rust-os against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fusagrada%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/usagrada/rust-os on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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/usagrada/rust-os
[INFO] finished tweaking git repo https://github.com/usagrada/rust-os
[INFO] tweaked toml for git repo https://github.com/usagrada/rust-os written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/usagrada/rust-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70a371ec7077deb37241c0c77ff5f7d9fecac161a274713c492d6e30eb23f913
[INFO] running `Command { std: "docker" "start" "-a" "70a371ec7077deb37241c0c77ff5f7d9fecac161a274713c492d6e30eb23f913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70a371ec7077deb37241c0c77ff5f7d9fecac161a274713c492d6e30eb23f913", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70a371ec7077deb37241c0c77ff5f7d9fecac161a274713c492d6e30eb23f913", kill_on_drop: false }`
[INFO] [stdout] 70a371ec7077deb37241c0c77ff5f7d9fecac161a274713c492d6e30eb23f913
[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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02a6996f62024b5a559df7ccb593e564cff2115d8d6e7422109ad6700a6e0353
[INFO] running `Command { std: "docker" "start" "-a" "02a6996f62024b5a559df7ccb593e564cff2115d8d6e7422109ad6700a6e0353", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.9.19
[INFO] [stderr]    Compiling x86_64 v0.14.5
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling blog_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Write`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use core::fmt::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 `blog_os` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "02a6996f62024b5a559df7ccb593e564cff2115d8d6e7422109ad6700a6e0353", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02a6996f62024b5a559df7ccb593e564cff2115d8d6e7422109ad6700a6e0353", kill_on_drop: false }`
[INFO] [stdout] 02a6996f62024b5a559df7ccb593e564cff2115d8d6e7422109ad6700a6e0353