[INFO] fetching crate poot 0.1.1...
[INFO] documenting poot-0.1.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate poot 0.1.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate poot 0.1.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate poot 0.1.1
[INFO] finished tweaking crates.io crate poot 0.1.1
[INFO] tweaked toml for crates.io crate poot 0.1.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate poot 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-normalization v0.1.20
[INFO] [stderr]   Downloaded simplesocket v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3117cd4b4c71e828668d12e21f0132b34e89ed2b7b081ca503d44add886fa6c
[INFO] running `Command { std: "docker" "start" "-a" "e3117cd4b4c71e828668d12e21f0132b34e89ed2b7b081ca503d44add886fa6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3117cd4b4c71e828668d12e21f0132b34e89ed2b7b081ca503d44add886fa6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3117cd4b4c71e828668d12e21f0132b34e89ed2b7b081ca503d44add886fa6c", kill_on_drop: false }`
[INFO] [stdout] e3117cd4b4c71e828668d12e21f0132b34e89ed2b7b081ca503d44add886fa6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c840e83f1c042112d5c216f974d45ccc5d1eb04a9a1579add5756bda303454ff
[INFO] running `Command { std: "docker" "start" "-a" "c840e83f1c042112d5c216f974d45ccc5d1eb04a9a1579add5756bda303454ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking smallvec v1.8.1
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling openssl v0.10.40
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking tracing-core v0.1.28
[INFO] [stderr]     Checking parking_lot_core v0.9.3
[INFO] [stderr]     Checking unicode-normalization v0.1.20
[INFO] [stderr]    Compiling rustls v0.20.6
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking sha-1 v0.10.0
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking tracing v0.1.35
[INFO] [stderr]     Checking rustls-pemfile v1.0.0
[INFO] [stderr]     Checking ipnet v2.5.0
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking rustls-native-certs v0.6.2
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling openssl-sys v0.9.74
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking indexmap v1.9.1
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]     Checking tokio v1.19.2
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking tungstenite v0.17.3
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking tokio-util v0.7.3
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking tokio-rustls v0.23.4
[INFO] [stderr]     Checking tokio-tungstenite v0.17.2
[INFO] [stderr]     Checking h2 v0.3.13
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking simplesocket v1.0.0
[INFO] [stderr]     Checking hyper v0.14.19
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.11
[INFO] [stderr]  Documenting poot v0.1.1 (/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(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `poot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name poot src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f399395d52ae97a2 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-465a966b4345160a.so --extern chrono=/opt/rustwide/target/debug/deps/libchrono-978857a69c611304.rmeta --extern dotenv=/opt/rustwide/target/debug/deps/libdotenv-cd86dd85a907a92e.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-a6e7b11464e4849f.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-9c7d51f549cf58b7.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-5771056b9443723a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-3c17b37b7973029e.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-eb0198a7b246524a.rmeta --extern simplesocket=/opt/rustwide/target/debug/deps/libsimplesocket-79b0a717253507e3.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-7d096f86a96f0fd0.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-ccf5257ea1d37694.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c840e83f1c042112d5c216f974d45ccc5d1eb04a9a1579add5756bda303454ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c840e83f1c042112d5c216f974d45ccc5d1eb04a9a1579add5756bda303454ff", kill_on_drop: false }`
[INFO] [stdout] c840e83f1c042112d5c216f974d45ccc5d1eb04a9a1579add5756bda303454ff
