[INFO] fetching crate horde 0.1.1...
[INFO] testing horde-0.1.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate horde 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate horde 0.1.1 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 horde 0.1.1
[INFO] finished tweaking crates.io crate horde 0.1.1
[INFO] tweaked toml for crates.io crate horde 0.1.1 written to /workspace/builds/worker-9/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] cf31a34ddbcc0b4e2394b637e11ef66ef8bc3f7886e8a8218580c549d546be3e
[INFO] running `Command { std: "docker" "start" "-a" "cf31a34ddbcc0b4e2394b637e11ef66ef8bc3f7886e8a8218580c549d546be3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf31a34ddbcc0b4e2394b637e11ef66ef8bc3f7886e8a8218580c549d546be3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf31a34ddbcc0b4e2394b637e11ef66ef8bc3f7886e8a8218580c549d546be3e", kill_on_drop: false }`
[INFO] [stdout] cf31a34ddbcc0b4e2394b637e11ef66ef8bc3f7886e8a8218580c549d546be3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 87b38e06840523e1244d69256e880b8356c3d4a7cde7fe2c33cd0598aaeb723f
[INFO] running `Command { std: "docker" "start" "-a" "87b38e06840523e1244d69256e880b8356c3d4a7cde7fe2c33cd0598aaeb723f", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling horde v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / #![feature(
[INFO] [stdout] 5  | |     alloc_layout_extra,
[INFO] [stdout] 6  | |     allocator_api,
[INFO] [stdout] 7  | |     asm,
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |     thread_local
[INFO] [stdout] 15 | | )]
[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 `horde` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "87b38e06840523e1244d69256e880b8356c3d4a7cde7fe2c33cd0598aaeb723f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87b38e06840523e1244d69256e880b8356c3d4a7cde7fe2c33cd0598aaeb723f", kill_on_drop: false }`
[INFO] [stdout] 87b38e06840523e1244d69256e880b8356c3d4a7cde7fe2c33cd0598aaeb723f
