[INFO] fetching crate holochain_tracing_macros 0.0.24...
[INFO] documenting holochain_tracing_macros-0.0.24 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate holochain_tracing_macros 0.0.24 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate holochain_tracing_macros 0.0.24 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 holochain_tracing_macros 0.0.24
[INFO] finished tweaking crates.io crate holochain_tracing_macros 0.0.24
[INFO] tweaked toml for crates.io crate holochain_tracing_macros 0.0.24 written to /workspace/builds/worker-56/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded integer-encoding v1.1.7
[INFO] [stderr]   Downloaded holochain_tracing v0.0.24
[INFO] [stderr]   Downloaded newrelic v0.2.2
[INFO] [stderr]   Downloaded newrelic-sys v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 53203b2ae5c6d437c2ad172d4630f8b66bcee5a4804003d25318251e6490a4fd
[INFO] running `Command { std: "docker" "start" "-a" "53203b2ae5c6d437c2ad172d4630f8b66bcee5a4804003d25318251e6490a4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53203b2ae5c6d437c2ad172d4630f8b66bcee5a4804003d25318251e6490a4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53203b2ae5c6d437c2ad172d4630f8b66bcee5a4804003d25318251e6490a4fd", kill_on_drop: false }`
[INFO] [stdout] 53203b2ae5c6d437c2ad172d4630f8b66bcee5a4804003d25318251e6490a4fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] d47afcf87d1a5ba6023577ee69a17fe73813a89bcbfb553d469b9c6b8784f2ac
[INFO] running `Command { std: "docker" "start" "-a" "d47afcf87d1a5ba6023577ee69a17fe73813a89bcbfb553d469b9c6b8784f2ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling protobuf v2.25.0
[INFO] [stderr]    Compiling prometheus v0.7.0
[INFO] [stderr]     Checking integer-encoding v1.1.7
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking object v0.26.0
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking thrift v0.13.0
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking quote v1.0.3
[INFO] [stderr]     Checking backtrace v0.3.61
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling trackable_derive v1.0.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]     Checking trackable v1.2.0
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking pin-project v0.4.28
[INFO] [stderr]     Checking trackable v0.2.24
[INFO] [stderr]     Checking rustracing v0.2.1
[INFO] [stderr]     Checking thrift_codec v0.1.1
[INFO] [stderr]     Checking rustracing_jaeger v0.2.1
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking serde_json v1.0.47
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking opentelemetry v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.3
[INFO] [stderr]     Checking opentelemetry-jaeger v0.1.0
[INFO] [stderr]     Checking holochain_tracing v0.0.24
[INFO] [stderr]  Documenting holochain_tracing_macros v0.0.24 (/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(proc_macro_span)]
[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 `holochain_tracing_macros`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name holochain_tracing_macros src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="tracing-on"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-c63bfeb339765fa9.rmeta --extern holochain_tracing=/opt/rustwide/target/debug/deps/libholochain_tracing-7a5b827359d4f06d.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-fe13910103b5e732.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-fe5fa053e4a743cc.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-911f0595f496cf20.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.24` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d47afcf87d1a5ba6023577ee69a17fe73813a89bcbfb553d469b9c6b8784f2ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d47afcf87d1a5ba6023577ee69a17fe73813a89bcbfb553d469b9c6b8784f2ac", kill_on_drop: false }`
[INFO] [stdout] d47afcf87d1a5ba6023577ee69a17fe73813a89bcbfb553d469b9c6b8784f2ac
