[INFO] fetching crate x_read_ip 0.1.2...
[INFO] testing x_read_ip-0.1.2 against 1.100.0-beta.1 for beta-1.100-2
[INFO] extracting crate x_read_ip 0.1.2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate x_read_ip 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate x_read_ip 0.1.2
[INFO] tweaked toml for crates.io crate x_read_ip 0.1.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate x_read_ip 0.1.2 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate x_read_ip 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de
[INFO] running `Command { std: "docker" "start" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling aok v0.1.17
[INFO] [stderr]    Compiling x_read_ip v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x_read_ip` (lib) due to 1 previous error
[INFO] [stderr] warning: unused dependency `aok`
[INFO] [stderr]  --> Cargo.toml:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | [dependencies.aok]
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `aok`
[INFO] [stderr] warning: `x_read_ip` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "inspect" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de", kill_on_drop: false }`
[INFO] [stdout] 7d782730c7967630a2c1aa13fc3e539511a49e711bc50ef1f0daef6fdc3266de
