[INFO] fetching crate netapp 0.1.2...
[INFO] documenting netapp-0.1.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate netapp 0.1.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate netapp 0.1.2 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 netapp 0.1.2
[INFO] finished tweaking crates.io crate netapp 0.1.2
[INFO] tweaked toml for crates.io crate netapp 0.1.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate netapp 0.1.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] f18f44b0e6730d33d433979652a5b067c67a146a0fbe43fb14a8766c2dd8b23e
[INFO] running `Command { std: "docker" "start" "-a" "f18f44b0e6730d33d433979652a5b067c67a146a0fbe43fb14a8766c2dd8b23e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f18f44b0e6730d33d433979652a5b067c67a146a0fbe43fb14a8766c2dd8b23e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18f44b0e6730d33d433979652a5b067c67a146a0fbe43fb14a8766c2dd8b23e", kill_on_drop: false }`
[INFO] [stdout] f18f44b0e6730d33d433979652a5b067c67a146a0fbe43fb14a8766c2dd8b23e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 3e5bf94f057ac32835fd2061126824c49307aa4fc743018529e9217f16fb9ea9
[INFO] running `Command { std: "docker" "start" "-a" "3e5bf94f057ac32835fd2061126824c49307aa4fc743018529e9217f16fb9ea9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]     Checking futures-io v0.3.13
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]    Compiling signal-hook v0.3.7
[INFO] [stderr]     Checking futures-sink v0.3.13
[INFO] [stderr]    Compiling rustversion v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]     Checking arc-swap v1.2.0
[INFO] [stderr]    Compiling libsodium-sys v0.2.6
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking libc v0.2.88
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling async-trait v0.1.48
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-process v1.0.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking futures-executor v0.3.13
[INFO] [stderr]     Checking futures v0.3.13
[INFO] [stderr]     Checking serde v1.0.124
[INFO] [stderr]     Checking rmp-serde v0.14.4
[INFO] [stderr]     Checking kuska-sodiumoxide v0.2.5-0
[INFO] [stderr]     Checking kuska-handshake v0.1.2
[INFO] [stderr]  Documenting netapp v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(map_first_last)]
[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 `netapp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name netapp src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern arc_swap=/opt/rustwide/target/debug/deps/libarc_swap-aaeff7f1f4c9d3de.rmeta --extern async_std=/opt/rustwide/target/debug/deps/libasync_std-7e6420c00e22ee77.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-e092d0c75ff53f93.so --extern base64=/opt/rustwide/target/debug/deps/libbase64-97875349cab274e6.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-7fa867c6685bdec1.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-d18df44c8d137dc3.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-22434ad43823605e.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-a3321b25c9ba499c.so --extern hex=/opt/rustwide/target/debug/deps/libhex-4e132399b961d086.rmeta --extern kuska_handshake=/opt/rustwide/target/debug/deps/libkuska_handshake-68549c5b4a8380d9.rmeta --extern sodiumoxide=/opt/rustwide/target/debug/deps/libkuska_sodiumoxide-b42fd96942984484.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-54947be58133e159.rmeta --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-f1b319399e89650f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5a4786122a081974.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-e423c5140e874eb1.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-eafc66fb84d50e34.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3e5bf94f057ac32835fd2061126824c49307aa4fc743018529e9217f16fb9ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e5bf94f057ac32835fd2061126824c49307aa4fc743018529e9217f16fb9ea9", kill_on_drop: false }`
[INFO] [stdout] 3e5bf94f057ac32835fd2061126824c49307aa4fc743018529e9217f16fb9ea9
