[INFO] fetching crate ranged_integers 0.4.2...
[INFO] documenting ranged_integers-0.4.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate ranged_integers 0.4.2 into /workspace/builds/worker-75/source
[INFO] validating manifest of crates.io crate ranged_integers 0.4.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ranged_integers 0.4.2
[INFO] finished tweaking crates.io crate ranged_integers 0.4.2
[INFO] tweaked toml for crates.io crate ranged_integers 0.4.2 written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate crates.io crate ranged_integers 0.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b380078404428f883a13e8c96d6dbae15eb6d2624af6a974b0a1a481967201bb
[INFO] running `Command { std: "docker" "start" "-a" "b380078404428f883a13e8c96d6dbae15eb6d2624af6a974b0a1a481967201bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b380078404428f883a13e8c96d6dbae15eb6d2624af6a974b0a1a481967201bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b380078404428f883a13e8c96d6dbae15eb6d2624af6a974b0a1a481967201bb", kill_on_drop: false }`
[INFO] [stdout] b380078404428f883a13e8c96d6dbae15eb6d2624af6a974b0a1a481967201bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7da7c2fb08e953a9d79f6d560423f7c71311a47af8d9140888849c76f4fff840
[INFO] running `Command { std: "docker" "start" "-a" "7da7c2fb08e953a9d79f6d560423f7c71311a47af8d9140888849c76f4fff840", kill_on_drop: false }`
[INFO] [stderr]  Documenting ranged_integers v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:291:1
[INFO] [stdout]     |
[INFO] [stdout] 291 | #![feature(const_generics)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:292:1
[INFO] [stdout]     |
[INFO] [stdout] 292 | #![feature(const_evaluatable_checked)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:293:1
[INFO] [stdout]     |
[INFO] [stdout] 293 | #![feature(const_panic)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:294:1
[INFO] [stdout]     |
[INFO] [stdout] 294 | #![feature(const_trait_impl)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:295:1
[INFO] [stdout]     |
[INFO] [stdout] 295 | #![feature(const_raw_ptr_deref)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:296:1
[INFO] [stdout]     |
[INFO] [stdout] 296 | #![feature(specialization)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ranged_integers`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ranged_integers src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.4.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7da7c2fb08e953a9d79f6d560423f7c71311a47af8d9140888849c76f4fff840", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7da7c2fb08e953a9d79f6d560423f7c71311a47af8d9140888849c76f4fff840", kill_on_drop: false }`
[INFO] [stdout] 7da7c2fb08e953a9d79f6d560423f7c71311a47af8d9140888849c76f4fff840
