[INFO] fetching crate levenshtein_automata 0.2.1...
[INFO] testing levenshtein_automata-0.2.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate levenshtein_automata 0.2.1 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate levenshtein_automata 0.2.1 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 levenshtein_automata 0.2.1
[INFO] finished tweaking crates.io crate levenshtein_automata 0.2.1
[INFO] tweaked toml for crates.io crate levenshtein_automata 0.2.1 written to /workspace/builds/worker-22/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 levenshtein v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] bf69fc61f141bcbc69f3f55ee6ffd1a9319270b90e7f5b6b99d7595647e9f664
[INFO] running `Command { std: "docker" "start" "-a" "bf69fc61f141bcbc69f3f55ee6ffd1a9319270b90e7f5b6b99d7595647e9f664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf69fc61f141bcbc69f3f55ee6ffd1a9319270b90e7f5b6b99d7595647e9f664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf69fc61f141bcbc69f3f55ee6ffd1a9319270b90e7f5b6b99d7595647e9f664", kill_on_drop: false }`
[INFO] [stdout] bf69fc61f141bcbc69f3f55ee6ffd1a9319270b90e7f5b6b99d7595647e9f664
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] 3d4e8f86505320ab654b47ead66071c9c5a320f8678cc63b818f9e273b5e7d7e
[INFO] running `Command { std: "docker" "start" "-a" "3d4e8f86505320ab654b47ead66071c9c5a320f8678cc63b818f9e273b5e7d7e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling levenshtein_automata v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "3d4e8f86505320ab654b47ead66071c9c5a320f8678cc63b818f9e273b5e7d7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d4e8f86505320ab654b47ead66071c9c5a320f8678cc63b818f9e273b5e7d7e", kill_on_drop: false }`
[INFO] [stdout] 3d4e8f86505320ab654b47ead66071c9c5a320f8678cc63b818f9e273b5e7d7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f87cc7b5280da5508691f7bbc7612798343020b4c46912256ce9d5cc003720a4
[INFO] running `Command { std: "docker" "start" "-a" "f87cc7b5280da5508691f7bbc7612798343020b4c46912256ce9d5cc003720a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling levenshtein v1.0.5
[INFO] [stderr]    Compiling levenshtein_automata v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:35:19
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![cfg_attr(test, feature(test))]
[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 `levenshtein_automata` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f87cc7b5280da5508691f7bbc7612798343020b4c46912256ce9d5cc003720a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f87cc7b5280da5508691f7bbc7612798343020b4c46912256ce9d5cc003720a4", kill_on_drop: false }`
[INFO] [stdout] f87cc7b5280da5508691f7bbc7612798343020b4c46912256ce9d5cc003720a4
