[INFO] fetching crate consist 0.3.2...
[INFO] testing consist-0.3.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate consist 0.3.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate consist 0.3.2 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 consist 0.3.2
[INFO] finished tweaking crates.io crate consist 0.3.2
[INFO] tweaked toml for crates.io crate consist 0.3.2 written to /workspace/builds/worker-12/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 6eebef542be967bf22138ac715c42d8617bd3adc26890eba93e09f9a37202b41
[INFO] running `Command { std: "docker" "start" "-a" "6eebef542be967bf22138ac715c42d8617bd3adc26890eba93e09f9a37202b41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6eebef542be967bf22138ac715c42d8617bd3adc26890eba93e09f9a37202b41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eebef542be967bf22138ac715c42d8617bd3adc26890eba93e09f9a37202b41", kill_on_drop: false }`
[INFO] [stdout] 6eebef542be967bf22138ac715c42d8617bd3adc26890eba93e09f9a37202b41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] c0910c0f9a92607193cc025674366f731131f7e9e42a05ee9a6a648281a79aaf
[INFO] running `Command { std: "docker" "start" "-a" "c0910c0f9a92607193cc025674366f731131f7e9e42a05ee9a6a648281a79aaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling consist v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(btree_range, collections_bound)]
[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 `consist` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c0910c0f9a92607193cc025674366f731131f7e9e42a05ee9a6a648281a79aaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0910c0f9a92607193cc025674366f731131f7e9e42a05ee9a6a648281a79aaf", kill_on_drop: false }`
[INFO] [stdout] c0910c0f9a92607193cc025674366f731131f7e9e42a05ee9a6a648281a79aaf