[INFO] cloning repository https://github.com/JosephFerano/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/JosephFerano/rust_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosephFerano%2Frust_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosephFerano%2Frust_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0502adec20e78e6019d68a023520c0c30f3fcff8
[INFO] testing JosephFerano/rust_os against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosephFerano%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/JosephFerano/rust_os on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JosephFerano/rust_os
[INFO] finished tweaking git repo https://github.com/JosephFerano/rust_os
[INFO] tweaked toml for git repo https://github.com/JosephFerano/rust_os written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/JosephFerano/rust_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded multiboot2 v0.7.1
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c546ad6d7966fe51b34cd91f0ef9ce44aaad89412b0e6353e1fd7d88849721a3
[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" "c546ad6d7966fe51b34cd91f0ef9ce44aaad89412b0e6353e1fd7d88849721a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c546ad6d7966fe51b34cd91f0ef9ce44aaad89412b0e6353e1fd7d88849721a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c546ad6d7966fe51b34cd91f0ef9ce44aaad89412b0e6353e1fd7d88849721a3", kill_on_drop: false }`
[INFO] [stdout] c546ad6d7966fe51b34cd91f0ef9ce44aaad89412b0e6353e1fd7d88849721a3
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--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] 8886db0ba24dde7477d065186569d54b49cea952bbdc770df3ce7f006ebfc511
[INFO] running `Command { std: "docker" "start" "-a" "8886db0ba24dde7477d065186569d54b49cea952bbdc770df3ce7f006ebfc511", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling volatile v0.2.4
[INFO] [stderr]    Compiling multiboot2 v0.7.1
[INFO] [stderr]    Compiling first_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/vga_buffer.rs:89:21
[INFO] [stdout]    |
[INFO] [stdout] 89 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `first_os` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "8886db0ba24dde7477d065186569d54b49cea952bbdc770df3ce7f006ebfc511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8886db0ba24dde7477d065186569d54b49cea952bbdc770df3ce7f006ebfc511", kill_on_drop: false }`
[INFO] [stdout] 8886db0ba24dde7477d065186569d54b49cea952bbdc770df3ce7f006ebfc511
