[INFO] fetching crate aamp 0.1.6...
[INFO] documenting aamp-0.1.6 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate aamp 0.1.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate aamp 0.1.6 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 aamp 0.1.6
[INFO] finished tweaking crates.io crate aamp 0.1.6
[INFO] tweaked toml for crates.io crate aamp 0.1.6 written to /workspace/builds/worker-7/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] 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 3e04a528cb582c61998d914da79c69c88231c5b65d76d821b313e68da7679739
[INFO] running `Command { std: "docker" "start" "-a" "3e04a528cb582c61998d914da79c69c88231c5b65d76d821b313e68da7679739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e04a528cb582c61998d914da79c69c88231c5b65d76d821b313e68da7679739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e04a528cb582c61998d914da79c69c88231c5b65d76d821b313e68da7679739", kill_on_drop: false }`
[INFO] [stdout] 3e04a528cb582c61998d914da79c69c88231c5b65d76d821b313e68da7679739
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] ae406300af702b282484884a369b5298c8a5202b3e538d9fd6d0d3ba34645ba9
[INFO] running `Command { std: "docker" "start" "-a" "ae406300af702b282484884a369b5298c8a5202b3e538d9fd6d0d3ba34645ba9", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling cached_proc_macro_types v0.1.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]     Checking parse_int v0.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling binread_derive v1.4.3
[INFO] [stderr]    Compiling binwrite_derive v0.2.1
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking binwrite v0.2.1
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking binread v1.4.1
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling cached_proc_macro v0.6.0
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking cached v0.23.0
[INFO] [stderr]  Documenting aamp v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(seek_stream_len)]
[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 `aamp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name aamp 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 binread=/opt/rustwide/target/debug/deps/libbinread-2bdfc19ef76add8c.rmeta --extern binwrite=/opt/rustwide/target/debug/deps/libbinwrite-e3e68ef4d09b1867.rmeta --extern cached=/opt/rustwide/target/debug/deps/libcached-c544a5179974487e.rmeta --extern crc=/opt/rustwide/target/debug/deps/libcrc-72ff15ca0c2a6bb1.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-dd005bda8a71734d.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-5183ff54085e1086.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern metrohash=/opt/rustwide/target/debug/deps/libmetrohash-f65a406db6483211.rmeta --extern num_format=/opt/rustwide/target/debug/deps/libnum_format-16d6509c1c96527c.rmeta --extern parse_int=/opt/rustwide/target/debug/deps/libparse_int-d150a0c19e7c75b7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-46bf5b535d6b6b09.rmeta --extern ryu=/opt/rustwide/target/debug/deps/libryu-0bcf425490ac7c5b.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ad0ca6b90949e531.rmeta --extern unescape=/opt/rustwide/target/debug/deps/libunescape-92b4cde5adf9ca60.rmeta --cap-lints=warn --crate-version 0.1.6` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ae406300af702b282484884a369b5298c8a5202b3e538d9fd6d0d3ba34645ba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae406300af702b282484884a369b5298c8a5202b3e538d9fd6d0d3ba34645ba9", kill_on_drop: false }`
[INFO] [stdout] ae406300af702b282484884a369b5298c8a5202b3e538d9fd6d0d3ba34645ba9
