[INFO] fetching crate tracing-chrometrace 0.1.19...
[INFO] documenting tracing-chrometrace-0.1.19 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate tracing-chrometrace 0.1.19 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate tracing-chrometrace 0.1.19 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tracing-chrometrace 0.1.19
[INFO] finished tweaking crates.io crate tracing-chrometrace 0.1.19
[INFO] tweaked toml for crates.io crate tracing-chrometrace 0.1.19 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-chrome v0.5.0
[INFO] [stderr]   Downloaded temp-file v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d869faa81f39af378669c4d01065a85a2fab616e21d147bc45bd452a47ae6e3e
[INFO] running `Command { std: "docker" "start" "-a" "d869faa81f39af378669c4d01065a85a2fab616e21d147bc45bd452a47ae6e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d869faa81f39af378669c4d01065a85a2fab616e21d147bc45bd452a47ae6e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d869faa81f39af378669c4d01065a85a2fab616e21d147bc45bd452a47ae6e3e", kill_on_drop: false }`
[INFO] [stdout] d869faa81f39af378669c4d01065a85a2fab616e21d147bc45bd452a47ae6e3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a22a666e5b2c08d78359a63668ce694cecced660aa3731ade3baedeb81108d58
[INFO] running `Command { std: "docker" "start" "-a" "a22a666e5b2c08d78359a63668ce694cecced660aa3731ade3baedeb81108d58", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling strum_macros v0.22.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking strum v0.22.0
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking serde v1.0.196
[INFO] [stderr]     Checking serde_json v1.0.113
[INFO] [stderr]  Documenting tracing-chrometrace v0.1.19 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(thread_id_value)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `tracing-chrometrace`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name tracing_chrometrace src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=02061c1f57acb4a1 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_queue=/opt/rustwide/target/debug/deps/libcrossbeam_queue-f810a736c7bd0294.rmeta --extern derivative=/opt/rustwide/target/debug/deps/libderivative-f74e524bda472d9a.so --extern derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-e2f8a72c719282d4.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-d40f6d0edd1769a8.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7e5cc45146731dac.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-80648eae4f43e660.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-4c6808edc12775b8.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-7dceee110b7419b0.so --extern tokio=/opt/rustwide/target/debug/deps/libtokio-316da11d7a4927c9.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-b8241a417ebea143.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-77b3f4c777d8f19a.rmeta --cap-lints=warn --crate-version 0.1.19` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a22a666e5b2c08d78359a63668ce694cecced660aa3731ade3baedeb81108d58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a22a666e5b2c08d78359a63668ce694cecced660aa3731ade3baedeb81108d58", kill_on_drop: false }`
[INFO] [stdout] a22a666e5b2c08d78359a63668ce694cecced660aa3731ade3baedeb81108d58
