[INFO] fetching crate const-vec 1.0.1...
[INFO] testing const-vec-1.0.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate const-vec 1.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate const-vec 1.0.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-vec 1.0.1
[INFO] finished tweaking crates.io crate const-vec 1.0.1
[INFO] tweaked toml for crates.io crate const-vec 1.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 889bc66249e22bc5e50eb7319b332fdd6ed8d02e6edb4081d1a68cdae843b769
[INFO] running `Command { std: "docker" "start" "-a" "889bc66249e22bc5e50eb7319b332fdd6ed8d02e6edb4081d1a68cdae843b769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "889bc66249e22bc5e50eb7319b332fdd6ed8d02e6edb4081d1a68cdae843b769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "889bc66249e22bc5e50eb7319b332fdd6ed8d02e6edb4081d1a68cdae843b769", kill_on_drop: false }`
[INFO] [stdout] 889bc66249e22bc5e50eb7319b332fdd6ed8d02e6edb4081d1a68cdae843b769
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e38ea6836b26b85ec030d747f6f7f07851d9eade93fa0e74f9486e2e53c4d9d8
[INFO] running `Command { std: "docker" "start" "-a" "e38ea6836b26b85ec030d747f6f7f07851d9eade93fa0e74f9486e2e53c4d9d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling const-vec v1.0.1 (/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(raw_vec_internals, core_intrinsics)]
[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 `const-vec` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e38ea6836b26b85ec030d747f6f7f07851d9eade93fa0e74f9486e2e53c4d9d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e38ea6836b26b85ec030d747f6f7f07851d9eade93fa0e74f9486e2e53c4d9d8", kill_on_drop: false }`
[INFO] [stdout] e38ea6836b26b85ec030d747f6f7f07851d9eade93fa0e74f9486e2e53c4d9d8