[INFO] fetching crate tracing-chrometrace 0.1.15...
[INFO] documenting tracing-chrometrace-0.1.15 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate tracing-chrometrace 0.1.15 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate tracing-chrometrace 0.1.15 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 tracing-chrometrace 0.1.15
[INFO] finished tweaking crates.io crate tracing-chrometrace 0.1.15
[INFO] tweaked toml for crates.io crate tracing-chrometrace 0.1.15 written to /workspace/builds/worker-14/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 strum v0.22.0
[INFO] [stderr]   Downloaded strum_macros v0.22.0
[INFO] [stderr]   Downloaded tracing-appender v0.2.2
[INFO] [stderr]   Downloaded tracing-chrome v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 1c0a3f1358fe836231829666c03fbd39791b45b92236a90d87653ca173a8095c
[INFO] running `Command { std: "docker" "start" "-a" "1c0a3f1358fe836231829666c03fbd39791b45b92236a90d87653ca173a8095c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c0a3f1358fe836231829666c03fbd39791b45b92236a90d87653ca173a8095c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0a3f1358fe836231829666c03fbd39791b45b92236a90d87653ca173a8095c", kill_on_drop: false }`
[INFO] [stdout] 1c0a3f1358fe836231829666c03fbd39791b45b92236a90d87653ca173a8095c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 5e90a1f8c75c7b3d5aa433d0e1f409759be11f08a09a639679519be3cd31bf99
[INFO] running `Command { std: "docker" "start" "-a" "5e90a1f8c75c7b3d5aa433d0e1f409759be11f08a09a639679519be3cd31bf99", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling crossbeam-queue v0.3.5
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]    Compiling darling_core v0.14.1
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling tracing-attributes v0.1.21
[INFO] [stderr]    Compiling strum_macros v0.22.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling darling_macro v0.14.1
[INFO] [stderr]     Checking strum v0.22.0
[INFO] [stderr]    Compiling darling v0.14.1
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]     Checking tracing-subscriber v0.3.11
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking serde v1.0.137
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking serde_json v1.0.81
[INFO] [stderr]  Documenting tracing-chrometrace v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(derive_default_enum)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(thread_id_value)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `tracing-chrometrace`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `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=eb8ae9e58c30e160 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_queue=/opt/rustwide/target/debug/deps/libcrossbeam_queue-24140551d9c5f91f.rmeta --extern derivative=/opt/rustwide/target/debug/deps/libderivative-c9e7b6a53239a9f5.so --extern derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-f4520b1819f4dfcf.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-311e13e6ee1f9772.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2ba9365f9dbc4a99.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-c1223086011b0c06.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-c654360bbf244d9e.so --extern tracing=/opt/rustwide/target/debug/deps/libtracing-50ac2cb6cb63a92f.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-3b4165af36682cdc.rmeta --cap-lints=warn --crate-version 0.1.15` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5e90a1f8c75c7b3d5aa433d0e1f409759be11f08a09a639679519be3cd31bf99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e90a1f8c75c7b3d5aa433d0e1f409759be11f08a09a639679519be3cd31bf99", kill_on_drop: false }`
[INFO] [stdout] 5e90a1f8c75c7b3d5aa433d0e1f409759be11f08a09a639679519be3cd31bf99