[INFO] fetching crate exact-conv 0.2.1...
[INFO] checking exact-conv-0.2.1 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate exact-conv 0.2.1 into /workspace/builds/worker-119/source
[INFO] validating manifest of crates.io crate exact-conv 0.2.1 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exact-conv 0.2.1
[INFO] finished tweaking crates.io crate exact-conv 0.2.1
[INFO] tweaked toml for crates.io crate exact-conv 0.2.1 written to /workspace/builds/worker-119/source/Cargo.toml
[INFO] crate crates.io crate exact-conv 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21e9345782cc90d900e4d4b22c702bcab17e9b0f202a02a22150f6fe825d3ced
[INFO] running `Command { std: "docker" "start" "-a" "21e9345782cc90d900e4d4b22c702bcab17e9b0f202a02a22150f6fe825d3ced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21e9345782cc90d900e4d4b22c702bcab17e9b0f202a02a22150f6fe825d3ced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21e9345782cc90d900e4d4b22c702bcab17e9b0f202a02a22150f6fe825d3ced", kill_on_drop: false }`
[INFO] [stdout] 21e9345782cc90d900e4d4b22c702bcab17e9b0f202a02a22150f6fe825d3ced
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c062b023a879fa6b5829c55d4ef7332fa6e598268c3ce5dabc0e45551e7ded0b
[INFO] running `Command { std: "docker" "start" "-a" "c062b023a879fa6b5829c55d4ef7332fa6e598268c3ce5dabc0e45551e7ded0b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking exact-conv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/ieee754.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_bits_const)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `exact-conv` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c062b023a879fa6b5829c55d4ef7332fa6e598268c3ce5dabc0e45551e7ded0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c062b023a879fa6b5829c55d4ef7332fa6e598268c3ce5dabc0e45551e7ded0b", kill_on_drop: false }`
[INFO] [stdout] c062b023a879fa6b5829c55d4ef7332fa6e598268c3ce5dabc0e45551e7ded0b
