[INFO] fetching crate minutiae 0.12.2...
[INFO] documenting minutiae-0.12.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate minutiae 0.12.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate minutiae 0.12.2 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 minutiae 0.12.2
[INFO] finished tweaking crates.io crate minutiae 0.12.2
[INFO] tweaked toml for crates.io crate minutiae 0.12.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 18d024e6e674b97afe51e98dfa320e6fc3f1f11e564628ef190986150e067f0d
[INFO] running `Command { std: "docker" "start" "-a" "18d024e6e674b97afe51e98dfa320e6fc3f1f11e564628ef190986150e067f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18d024e6e674b97afe51e98dfa320e6fc3f1f11e564628ef190986150e067f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18d024e6e674b97afe51e98dfa320e6fc3f1f11e564628ef190986150e067f0d", kill_on_drop: false }`
[INFO] [stdout] 18d024e6e674b97afe51e98dfa320e6fc3f1f11e564628ef190986150e067f0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 5418c990d2ef8c2d683474c3268e31dcf4e21372c934c98bf9a8b1e087219370
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5418c990d2ef8c2d683474c3268e31dcf4e21372c934c98bf9a8b1e087219370", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]  Documenting minutiae v0.12.2 (/opt/rustwide/workdir)
[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  | |     associated_type_defaults,
[INFO] [stdout] 6  | |     box_syntax,
[INFO] [stdout] 7  | |     core_intrinsics,
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |     const_transmute
[INFO] [stdout] 15 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `minutiae`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name minutiae 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 --extern futures=/opt/rustwide/target/debug/deps/libfutures-533cf53875604e8f.rmeta --extern gif=/opt/rustwide/target/debug/deps/libgif-e352a9da6db2d0b9.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-3447830d0f7ec46a.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-af6378c4dbf8e8cc.rmeta --extern rand_pcg=/opt/rustwide/target/debug/deps/librand_pcg-a1a005491cb20910.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-95d9fc37d094a7dd.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-c2fa31818f7cf7ea.rmeta --cap-lints=warn --crate-version 0.12.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5418c990d2ef8c2d683474c3268e31dcf4e21372c934c98bf9a8b1e087219370", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5418c990d2ef8c2d683474c3268e31dcf4e21372c934c98bf9a8b1e087219370", kill_on_drop: false }`
[INFO] [stdout] 5418c990d2ef8c2d683474c3268e31dcf4e21372c934c98bf9a8b1e087219370
