[INFO] fetching crate embedded-svc 0.7.1...
[INFO] documenting embedded-svc-0.7.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate embedded-svc 0.7.1 into /workspace/builds/worker-103/source
[INFO] validating manifest of crates.io crate embedded-svc 0.7.1 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 embedded-svc 0.7.1
[INFO] finished tweaking crates.io crate embedded-svc 0.7.1
[INFO] tweaked toml for crates.io crate embedded-svc 0.7.1 written to /workspace/builds/worker-103/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-103/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-103/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] d87d6f0283c5b45c38690585cd5dfd2b43f101dbe49983bd6d6d37a843460f41
[INFO] running `Command { std: "docker" "start" "-a" "d87d6f0283c5b45c38690585cd5dfd2b43f101dbe49983bd6d6d37a843460f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d87d6f0283c5b45c38690585cd5dfd2b43f101dbe49983bd6d6d37a843460f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d87d6f0283c5b45c38690585cd5dfd2b43f101dbe49983bd6d6d37a843460f41", kill_on_drop: false }`
[INFO] [stdout] d87d6f0283c5b45c38690585cd5dfd2b43f101dbe49983bd6d6d37a843460f41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-103/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-103/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] 4ca6dd489285ab20a694b4e841c3ef8a921c2f2c0e09324f6f8d1853b29f0124
[INFO] running `Command { std: "docker" "start" "-a" "4ca6dd489285ab20a694b4e841c3ef8a921c2f2c0e09324f6f8d1853b29f0124", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]     Checking no-std-net v0.5.0
[INFO] [stderr]     Checking http-auth-basic v0.1.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling enumset_derive v0.5.5
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]     Checking enumset v1.0.7
[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.3
[INFO] [stderr]     Checking num_enum v0.5.3
[INFO] [stderr]  Documenting embedded-svc v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(btree_retain)]
[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 `embedded-svc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name embedded_svc src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="alloc"' --cfg 'feature="anyhow"' --cfg 'feature="default"' --cfg 'feature="http-auth-basic"' --cfg 'feature="num_enum"' --cfg 'feature="serde"' --cfg 'feature="serde_json"' --cfg 'feature="std"' --cfg 'feature="strum"' --cfg 'feature="strum_macros"' --cfg 'feature="url"' --cfg 'feature="use_numenum"' --cfg 'feature="use_serde"' --cfg 'feature="use_strum"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-c71486e08dde7454.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-e856fd626e604e49.so --extern enumset=/opt/rustwide/target/debug/deps/libenumset-7d3f04bfbbd6f3f2.rmeta --extern http_auth_basic=/opt/rustwide/target/debug/deps/libhttp_auth_basic-2603993dc5dafd0c.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-325d2e3c8b888de3.rmeta --extern no_std_net=/opt/rustwide/target/debug/deps/libno_std_net-a222e7354da59122.rmeta --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-ef06e683b6d9f01d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7cd652a2b851c3ee.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-55778f9fba9df9ba.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-a08f3cd804d5d373.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-438990b33a586628.so --extern url=/opt/rustwide/target/debug/deps/liburl-f6ffcc7df1261a72.rmeta --cap-lints=warn --crate-version 0.7.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4ca6dd489285ab20a694b4e841c3ef8a921c2f2c0e09324f6f8d1853b29f0124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca6dd489285ab20a694b4e841c3ef8a921c2f2c0e09324f6f8d1853b29f0124", kill_on_drop: false }`
[INFO] [stdout] 4ca6dd489285ab20a694b4e841c3ef8a921c2f2c0e09324f6f8d1853b29f0124
