[INFO] fetching crate bruteforce 0.2.0...
[INFO] testing bruteforce-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate bruteforce 0.2.0 into /workspace/builds/worker-40/source
[INFO] validating manifest of crates.io crate bruteforce 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bruteforce 0.2.0
[INFO] finished tweaking crates.io crate bruteforce 0.2.0
[INFO] tweaked toml for crates.io crate bruteforce 0.2.0 written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bruteforce-macros v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4759f56fd037f63d3a3a019c3e0058267e62eed38afcb906f6c8974103d141ee
[INFO] running `Command { std: "docker" "start" "-a" "4759f56fd037f63d3a3a019c3e0058267e62eed38afcb906f6c8974103d141ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4759f56fd037f63d3a3a019c3e0058267e62eed38afcb906f6c8974103d141ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4759f56fd037f63d3a3a019c3e0058267e62eed38afcb906f6c8974103d141ee", kill_on_drop: false }`
[INFO] [stdout] 4759f56fd037f63d3a3a019c3e0058267e62eed38afcb906f6c8974103d141ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ada64c5cc9b99cb427db7c62cc2c8d0dcff04f084f94aadd6e0860026d61c7d
[INFO] running `Command { std: "docker" "start" "-a" "7ada64c5cc9b99cb427db7c62cc2c8d0dcff04f084f94aadd6e0860026d61c7d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling no-std-compat v0.3.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling bruteforce-macros v0.2.0
[INFO] [stderr]    Compiling bruteforce v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     const_fn,
[INFO] [stdout]   |     ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / #![feature(
[INFO] [stdout] 5  | |     const_fn,
[INFO] [stdout] 6  | |     test,
[INFO] [stdout] 7  | |     generators,
[INFO] [stdout] ...  |
[INFO] [stdout] 11 | |     proc_macro_hygiene
[INFO] [stdout] 12 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_if_match` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bruteforce` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7ada64c5cc9b99cb427db7c62cc2c8d0dcff04f084f94aadd6e0860026d61c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ada64c5cc9b99cb427db7c62cc2c8d0dcff04f084f94aadd6e0860026d61c7d", kill_on_drop: false }`
[INFO] [stdout] 7ada64c5cc9b99cb427db7c62cc2c8d0dcff04f084f94aadd6e0860026d61c7d