[INFO] fetching crate apt-cache 0.1.3...
[INFO] testing apt-cache-0.1.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate apt-cache 0.1.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate apt-cache 0.1.3 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 apt-cache 0.1.3
[INFO] finished tweaking crates.io crate apt-cache 0.1.3
[INFO] tweaked toml for crates.io crate apt-cache 0.1.3 written to /workspace/builds/worker-2/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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 9e184f2ee3936172f50c272a23a21a61937616a7a59ac538d4928a03df52b739
[INFO] running `Command { std: "docker" "start" "-a" "9e184f2ee3936172f50c272a23a21a61937616a7a59ac538d4928a03df52b739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e184f2ee3936172f50c272a23a21a61937616a7a59ac538d4928a03df52b739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e184f2ee3936172f50c272a23a21a61937616a7a59ac538d4928a03df52b739", kill_on_drop: false }`
[INFO] [stdout] 9e184f2ee3936172f50c272a23a21a61937616a7a59ac538d4928a03df52b739
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] a517732bb7623d0bcbe527228630114511f1eebf9a8e72ebe6ef20f2549b441c
[INFO] running `Command { std: "docker" "start" "-a" "a517732bb7623d0bcbe527228630114511f1eebf9a8e72ebe6ef20f2549b441c", kill_on_drop: false }`
[INFO] [stderr]    Compiling apt-cache v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(str_strip)]
[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 `apt-cache` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a517732bb7623d0bcbe527228630114511f1eebf9a8e72ebe6ef20f2549b441c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a517732bb7623d0bcbe527228630114511f1eebf9a8e72ebe6ef20f2549b441c", kill_on_drop: false }`
[INFO] [stdout] a517732bb7623d0bcbe527228630114511f1eebf9a8e72ebe6ef20f2549b441c