[INFO] fetching crate levenshtein_automata 0.2.1...
[INFO] testing levenshtein_automata-0.2.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate levenshtein_automata 0.2.1 into /workspace/builds/worker-118/source
[INFO] validating manifest of crates.io crate levenshtein_automata 0.2.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-118/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded levenshtein v1.0.5
[INFO] [stderr]   Downloaded fst v0.4.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d584b3bc7ef023d9e634dc4d4e42eb4f32c703c117c316ce0d6e47daba682fd
[INFO] running `Command { std: "docker" "start" "-a" "1d584b3bc7ef023d9e634dc4d4e42eb4f32c703c117c316ce0d6e47daba682fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d584b3bc7ef023d9e634dc4d4e42eb4f32c703c117c316ce0d6e47daba682fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d584b3bc7ef023d9e634dc4d4e42eb4f32c703c117c316ce0d6e47daba682fd", kill_on_drop: false }`
[INFO] [stdout] 1d584b3bc7ef023d9e634dc4d4e42eb4f32c703c117c316ce0d6e47daba682fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2342f46c1082a5ce51583e4428e76b5f36dd22a57bda3aa7e2bdae7efa2d2a44
[INFO] running `Command { std: "docker" "start" "-a" "2342f46c1082a5ce51583e4428e76b5f36dd22a57bda3aa7e2bdae7efa2d2a44", 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 1.64s
[INFO] running `Command { std: "docker" "inspect" "2342f46c1082a5ce51583e4428e76b5f36dd22a57bda3aa7e2bdae7efa2d2a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2342f46c1082a5ce51583e4428e76b5f36dd22a57bda3aa7e2bdae7efa2d2a44", kill_on_drop: false }`
[INFO] [stdout] 2342f46c1082a5ce51583e4428e76b5f36dd22a57bda3aa7e2bdae7efa2d2a44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5aeb53b35103dadc0736414b6537d23cec119c4db1ee134cb88a4fc45821a08c
[INFO] running `Command { std: "docker" "start" "-a" "5aeb53b35103dadc0736414b6537d23cec119c4db1ee134cb88a4fc45821a08c", kill_on_drop: false }`
[INFO] [stderr]    Compiling levenshtein v1.0.5
[INFO] [stderr]    Compiling levenshtein_automata v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `levenshtein_automata` due to 2 previous errors
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:35:27
[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] running `Command { std: "docker" "inspect" "5aeb53b35103dadc0736414b6537d23cec119c4db1ee134cb88a4fc45821a08c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5aeb53b35103dadc0736414b6537d23cec119c4db1ee134cb88a4fc45821a08c", kill_on_drop: false }`
[INFO] [stdout] 5aeb53b35103dadc0736414b6537d23cec119c4db1ee134cb88a4fc45821a08c