[INFO] fetching crate aamp 0.1.6...
[INFO] documenting aamp-0.1.6 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate aamp 0.1.6 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate aamp 0.1.6 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded metrohash v1.0.6
[INFO] [stderr]   Downloaded binread v1.4.1
[INFO] [stderr]   Downloaded binwrite_derive v0.2.1
[INFO] [stderr]   Downloaded cached_proc_macro v0.6.2
[INFO] [stderr]   Downloaded cached_proc_macro_types v0.1.0
[INFO] [stderr]   Downloaded num-format v0.4.0
[INFO] [stderr]   Downloaded binread_derive v1.4.3
[INFO] [stderr]   Downloaded binwrite v0.2.1
[INFO] [stderr]   Downloaded parse_int v0.5.0
[INFO] [stderr]   Downloaded unescape v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a4b6f7fa80298cb845fa91d2aeba67786d55ae2480740a5b6a5fe4e8349ee6d
[INFO] running `Command { std: "docker" "start" "-a" "0a4b6f7fa80298cb845fa91d2aeba67786d55ae2480740a5b6a5fe4e8349ee6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a4b6f7fa80298cb845fa91d2aeba67786d55ae2480740a5b6a5fe4e8349ee6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a4b6f7fa80298cb845fa91d2aeba67786d55ae2480740a5b6a5fe4e8349ee6d", kill_on_drop: false }`
[INFO] [stdout] 0a4b6f7fa80298cb845fa91d2aeba67786d55ae2480740a5b6a5fe4e8349ee6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9152013b8f04fb662667cf44e5d3239183adb10e2ca7bb72f6f6fd989ade2dbc
[INFO] running `Command { std: "docker" "start" "-a" "9152013b8f04fb662667cf44e5d3239183adb10e2ca7bb72f6f6fd989ade2dbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling cached_proc_macro_types v0.1.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking indexmap v1.8.2
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking parse_int v0.5.0
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling binread_derive v1.4.3
[INFO] [stderr]    Compiling binwrite_derive v0.2.1
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]     Checking binwrite v0.2.1
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]    Compiling cached_proc_macro v0.6.2
[INFO] [stderr]     Checking binread v1.4.1
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(seek_stream_len)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `aamp`
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[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,artifacts,future-incompat --document-private-items -C metadata=933924488576670e -L dependency=/opt/rustwide/target/debug/deps --extern binread=/opt/rustwide/target/debug/deps/libbinread-e9963cc6463b6cae.rmeta --extern binwrite=/opt/rustwide/target/debug/deps/libbinwrite-33f721bb45ab5075.rmeta --extern cached=/opt/rustwide/target/debug/deps/libcached-eca12c655ee33da4.rmeta --extern crc=/opt/rustwide/target/debug/deps/libcrc-90bce8734b456e09.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-ad7a2bc260eeb594.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-33ef8bea342ba240.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern metrohash=/opt/rustwide/target/debug/deps/libmetrohash-e12f91b1a9b0b50b.rmeta --extern num_format=/opt/rustwide/target/debug/deps/libnum_format-e43e3047ed69c58a.rmeta --extern parse_int=/opt/rustwide/target/debug/deps/libparse_int-6f70ae3c8547c40b.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-1c5e9376ee8338dc.rmeta --extern ryu=/opt/rustwide/target/debug/deps/libryu-fc7235f674042769.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ab62e5436bc5e57b.rmeta --extern unescape=/opt/rustwide/target/debug/deps/libunescape-6fcca50bf56ee067.rmeta --cap-lints=warn --crate-version 0.1.6` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9152013b8f04fb662667cf44e5d3239183adb10e2ca7bb72f6f6fd989ade2dbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9152013b8f04fb662667cf44e5d3239183adb10e2ca7bb72f6f6fd989ade2dbc", kill_on_drop: false }`
[INFO] [stdout] 9152013b8f04fb662667cf44e5d3239183adb10e2ca7bb72f6f6fd989ade2dbc