[INFO] fetching crate minutiae 0.12.2...
[INFO] documenting minutiae-0.12.2 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate minutiae 0.12.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate minutiae 0.12.2 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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" "+1.47.0" "fetch" "--locked" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4da92f70bcc8f0a82bca5b51e8bb93fa5e6155ec0625c4c3486d1f43ac93069a
[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" "4da92f70bcc8f0a82bca5b51e8bb93fa5e6155ec0625c4c3486d1f43ac93069a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4da92f70bcc8f0a82bca5b51e8bb93fa5e6155ec0625c4c3486d1f43ac93069a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4da92f70bcc8f0a82bca5b51e8bb93fa5e6155ec0625c4c3486d1f43ac93069a", kill_on_drop: false }`
[INFO] [stdout] 4da92f70bcc8f0a82bca5b51e8bb93fa5e6155ec0625c4c3486d1f43ac93069a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afe209e3b51ed23dbe09cb07e4ef820b0d90f7b4194a53da87420fd44962cf94
[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" "afe209e3b51ed23dbe09cb07e4ef820b0d90f7b4194a53da87420fd44962cf94", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking gif v0.9.2
[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] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `minutiae`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[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-2f80a151d70e23d0.rmeta --extern gif=/opt/rustwide/target/debug/deps/libgif-921774399612bdfb.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-377b7f3767757d66.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-eac865bbb6348113.rmeta --extern rand_pcg=/opt/rustwide/target/debug/deps/librand_pcg-95741a9352a4748c.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-560a8b8f37310699.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-2f4b01081a6a75e4.rmeta --cap-lints=warn --crate-version 0.12.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "afe209e3b51ed23dbe09cb07e4ef820b0d90f7b4194a53da87420fd44962cf94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afe209e3b51ed23dbe09cb07e4ef820b0d90f7b4194a53da87420fd44962cf94", kill_on_drop: false }`
[INFO] [stdout] afe209e3b51ed23dbe09cb07e4ef820b0d90f7b4194a53da87420fd44962cf94
