[INFO] fetching crate libos 0.1.2...
[INFO] testing libos-0.1.2 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate libos 0.1.2 into /workspace/builds/worker-39/source
[INFO] validating manifest of crates.io crate libos 0.1.2 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 crates.io crate libos 0.1.2
[INFO] finished tweaking crates.io crate libos 0.1.2
[INFO] tweaked toml for crates.io crate libos 0.1.2 written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 array-init v0.0.4
[INFO] [stderr]   Downloaded zero v0.1.2
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded llvm-tools v0.1.1
[INFO] [stderr]   Downloaded x86_64 v0.7.7
[INFO] [stderr]   Downloaded fixedvec v0.2.4
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded bootloader v0.6.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] aa9875e8548a7a5d1dc594421623f54600263bc1598127e8567431134bdb8dd0
[INFO] running `Command { std: "docker" "start" "-a" "aa9875e8548a7a5d1dc594421623f54600263bc1598127e8567431134bdb8dd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa9875e8548a7a5d1dc594421623f54600263bc1598127e8567431134bdb8dd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa9875e8548a7a5d1dc594421623f54600263bc1598127e8567431134bdb8dd0", kill_on_drop: false }`
[INFO] [stdout] aa9875e8548a7a5d1dc594421623f54600263bc1598127e8567431134bdb8dd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] [stdout] abc138a57a4b8d72ec7f7d9fe77eec8b78f40b6ff6096a27a16ff2215e7c42bb
[INFO] running `Command { std: "docker" "start" "-a" "abc138a57a4b8d72ec7f7d9fe77eec8b78f40b6ff6096a27a16ff2215e7c42bb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[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 array-init v0.0.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[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] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `usize_conversions` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "abc138a57a4b8d72ec7f7d9fe77eec8b78f40b6ff6096a27a16ff2215e7c42bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc138a57a4b8d72ec7f7d9fe77eec8b78f40b6ff6096a27a16ff2215e7c42bb", kill_on_drop: false }`
[INFO] [stdout] abc138a57a4b8d72ec7f7d9fe77eec8b78f40b6ff6096a27a16ff2215e7c42bb
