[INFO] cloning repository https://github.com/brendonh8/blog_os_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brendonh8/blog_os_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendonh8%2Fblog_os_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendonh8%2Fblog_os_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ea0de6bd3c9d1627c7dfc3e6efea05ecc201417
[INFO] testing brendonh8/blog_os_rs/5ea0de6bd3c9d1627c7dfc3e6efea05ecc201417 against 1.77.0 for beta-1.78-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendonh8%2Fblog_os_rs" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brendonh8/blog_os_rs on toolchain 1.77.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/brendonh8/blog_os_rs
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/brendonh8/blog_os_rs
[INFO] tweaked toml for git repo https://github.com/brendonh8/blog_os_rs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/brendonh8/blog_os_rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.77.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bootloader v0.9.24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b68bb6b5270d2d81199e6fdfc2d357602c1400e662de4d25e3d1443fb152b76
[INFO] running `Command { std: "docker" "start" "-a" "9b68bb6b5270d2d81199e6fdfc2d357602c1400e662de4d25e3d1443fb152b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b68bb6b5270d2d81199e6fdfc2d357602c1400e662de4d25e3d1443fb152b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b68bb6b5270d2d81199e6fdfc2d357602c1400e662de4d25e3d1443fb152b76", kill_on_drop: false }`
[INFO] [stdout] 9b68bb6b5270d2d81199e6fdfc2d357602c1400e662de4d25e3d1443fb152b76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.77.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28316e2f897e802dcae213994987aabbea2fcf59a27e183d84914c6f626da3b6
[INFO] running `Command { std: "docker" "start" "-a" "28316e2f897e802dcae213994987aabbea2fcf59a27e183d84914c6f626da3b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling volatile v0.4.6
[INFO] [stderr]    Compiling bootloader v0.9.24
[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 x86_64 v0.14.11
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/x86_64-0.14.11/src/lib.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "const_fn", feature(const_mut_refs))] // GDT add_entry()
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/x86_64-0.14.11/src/lib.rs:6:44
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "abi_x86_interrupt", feature(abi_x86_interrupt))]
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/x86_64-0.14.11/src/lib.rs:7:37
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(feature = "step_trait", feature(step_trait))]
[INFO] [stdout]   |                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/x86_64-0.14.11/src/lib.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(feature = "step_trait", feature(step_trait))]
[INFO] [stdout]   |                                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "28316e2f897e802dcae213994987aabbea2fcf59a27e183d84914c6f626da3b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28316e2f897e802dcae213994987aabbea2fcf59a27e183d84914c6f626da3b6", kill_on_drop: false }`
[INFO] [stdout] 28316e2f897e802dcae213994987aabbea2fcf59a27e183d84914c6f626da3b6