[INFO] cloning repository https://github.com/aconstantinou123/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/aconstantinou123/rust_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faconstantinou123%2Frust_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faconstantinou123%2Frust_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f321d4d024eba6b6c823633bd2918d7e56c6d96
[INFO] testing aconstantinou123/rust_os against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faconstantinou123%2Frust_os" "/workspace/builds/worker-76/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-76/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aconstantinou123/rust_os on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-76/source/.cargo/config
[INFO] started tweaking git repo https://github.com/aconstantinou123/rust_os
[INFO] finished tweaking git repo https://github.com/aconstantinou123/rust_os
[INFO] tweaked toml for git repo https://github.com/aconstantinou123/rust_os written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate git repo https://github.com/aconstantinou123/rust_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5b289e0d57dbcef0778d0b2d3968bcafaf05145c7a2d4df60fa051cdb8ae4b3
[INFO] running `Command { std: "docker" "start" "-a" "f5b289e0d57dbcef0778d0b2d3968bcafaf05145c7a2d4df60fa051cdb8ae4b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5b289e0d57dbcef0778d0b2d3968bcafaf05145c7a2d4df60fa051cdb8ae4b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5b289e0d57dbcef0778d0b2d3968bcafaf05145c7a2d4df60fa051cdb8ae4b3", kill_on_drop: false }`
[INFO] [stdout] f5b289e0d57dbcef0778d0b2d3968bcafaf05145c7a2d4df60fa051cdb8ae4b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b85fb6cad8cf84fb6b027fef519d102b05b4e23337dff19242e7f4e712d04ac8
[INFO] running `Command { std: "docker" "start" "-a" "b85fb6cad8cf84fb6b027fef519d102b05b4e23337dff19242e7f4e712d04ac8", kill_on_drop: false }`
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling zero v0.1.2
[INFO] [stderr]    Compiling ux v0.1.3
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling fixedvec v0.2.4
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling array-init v0.0.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/usize_conversions-0.2.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(i128_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `i128_type` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `usize_conversions` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b85fb6cad8cf84fb6b027fef519d102b05b4e23337dff19242e7f4e712d04ac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b85fb6cad8cf84fb6b027fef519d102b05b4e23337dff19242e7f4e712d04ac8", kill_on_drop: false }`
[INFO] [stdout] b85fb6cad8cf84fb6b027fef519d102b05b4e23337dff19242e7f4e712d04ac8