[INFO] fetching crate holochain_tracing_macros 0.0.24...
[INFO] documenting holochain_tracing_macros-0.0.24 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate holochain_tracing_macros 0.0.24 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate holochain_tracing_macros 0.0.24 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8001fcfbbcffc5111292809c77b5d7e25f8cf5d99dc11988d5d25242a622ae7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c8001fcfbbcffc5111292809c77b5d7e25f8cf5d99dc11988d5d25242a622ae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8001fcfbbcffc5111292809c77b5d7e25f8cf5d99dc11988d5d25242a622ae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8001fcfbbcffc5111292809c77b5d7e25f8cf5d99dc11988d5d25242a622ae7", kill_on_drop: false }`
[INFO] [stdout] c8001fcfbbcffc5111292809c77b5d7e25f8cf5d99dc11988d5d25242a622ae7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8f98debacafe2969bda09e09570127bbb5e5257e429e00635403e35bf30fbba8
[INFO] running `Command { std: "docker" "start" "-a" "8f98debacafe2969bda09e09570127bbb5e5257e429e00635403e35bf30fbba8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling protobuf v2.17.0
[INFO] [stderr]    Compiling prometheus v0.7.0
[INFO] [stderr]     Checking integer-encoding v1.1.5
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking thrift v0.13.0
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking quote v1.0.3
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]     Checking rustracing v0.2.1
[INFO] [stderr]     Checking thrift_codec v0.1.1
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking rustracing_jaeger v0.2.1
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking serde_json v1.0.47
[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-51b568df3619287c.rmeta --extern holochain_tracing=/opt/rustwide/target/debug/deps/libholochain_tracing-9821c147d5bc3c4d.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-958bf2a074a4960f.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-261fe5ccd541acad.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-482e0d4b73ac87db.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-2a8e0dd8e8f9ebe7.rmeta --extern proc_macro --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "8f98debacafe2969bda09e09570127bbb5e5257e429e00635403e35bf30fbba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f98debacafe2969bda09e09570127bbb5e5257e429e00635403e35bf30fbba8", kill_on_drop: false }`
[INFO] [stdout] 8f98debacafe2969bda09e09570127bbb5e5257e429e00635403e35bf30fbba8