[INFO] fetching crate holochain_metrics 0.0.52-alpha2...
[INFO] documenting holochain_metrics-0.0.52-alpha2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate holochain_metrics 0.0.52-alpha2 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate holochain_metrics 0.0.52-alpha2 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_metrics 0.0.52-alpha2
[INFO] finished tweaking crates.io crate holochain_metrics 0.0.52-alpha2
[INFO] tweaked toml for crates.io crate holochain_metrics 0.0.52-alpha2 written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] crate crates.io crate holochain_metrics 0.0.52-alpha2 already has a lockfile, it will not be regenerated
[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-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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] 52bec1a56e6baed9be00dfe700dd88ac60d45e04d49ec8943ed8c9f8a6362052
[INFO] running `Command { std: "docker" "start" "-a" "52bec1a56e6baed9be00dfe700dd88ac60d45e04d49ec8943ed8c9f8a6362052", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52bec1a56e6baed9be00dfe700dd88ac60d45e04d49ec8943ed8c9f8a6362052", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52bec1a56e6baed9be00dfe700dd88ac60d45e04d49ec8943ed8c9f8a6362052", kill_on_drop: false }`
[INFO] [stdout] 52bec1a56e6baed9be00dfe700dd88ac60d45e04d49ec8943ed8c9f8a6362052
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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] 8873ecc84b47aaf449e207d5f166df3942d8f80cd8fdc51aae8aae9a95768768
[INFO] running `Command { std: "docker" "start" "-a" "8873ecc84b47aaf449e207d5f166df3942d8f80cd8fdc51aae8aae9a95768768", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]     Checking itoa v0.4.6
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[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling protobuf v2.14.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
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[INFO] [stderr]     Checking base64 v0.9.3
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[INFO] [stderr]     Checking crossbeam-deque v0.7.3
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[INFO] [stderr]    Compiling itertools v0.8.2
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[INFO] [stderr]    Compiling rand_chacha v0.1.1
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[INFO] [stderr]     Checking block-buffer v0.3.3
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[INFO] [stderr]     Checking crossbeam-queue v0.1.2
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[INFO] [stderr]     Checking csv-core v0.1.10
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[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]    Compiling getrandom v0.1.15
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[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]     Checking url v1.7.2
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[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]    Compiling quote v0.6.13
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[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking crypto-mac v0.5.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking holochain_common v0.0.52-alpha2
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking hmac v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
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[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]    Compiling shrinkwraprs v0.2.1
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]    Compiling structopt-derive v0.3.3
[INFO] [stderr]    Compiling trackable v0.2.23
[INFO] [stderr]    Compiling rustracing v0.2.1
[INFO] [stderr]    Compiling thrift_codec v0.1.1
[INFO] [stderr]     Checking structopt v0.3.3
[INFO] [stderr]    Compiling tracing v0.1.13
[INFO] [stderr]    Compiling rustracing_jaeger v0.2.1
[INFO] [stderr]    Compiling pin-project v0.4.25
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.47
[INFO] [stderr]     Checking toml v0.5.0
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]    Compiling bincode v1.3.1
[INFO] [stderr]    Compiling tracing-serde v0.1.1
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]    Compiling tracing-log v0.1.1
[INFO] [stderr]    Compiling thrift v0.13.0
[INFO] [stderr]    Compiling opentelemetry v0.2.0
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking holochain_locksmith v0.0.52-alpha2
[INFO] [stderr]     Checking holochain_logging v0.0.7
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]    Compiling tracing-subscriber v0.2.3
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-signal v0.2.9
[INFO] [stderr]    Compiling opentelemetry-jaeger v0.1.0
[INFO] [stderr]     Checking tokio-process v0.2.5
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]    Compiling holochain_tracing v0.0.24
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking rusoto_credential v0.40.0
[INFO] [stderr]    Compiling holochain_tracing_macros v0.0.24
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/holochain_tracing_macros-0.0.24/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 compile `holochain_tracing_macros`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8873ecc84b47aaf449e207d5f166df3942d8f80cd8fdc51aae8aae9a95768768", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8873ecc84b47aaf449e207d5f166df3942d8f80cd8fdc51aae8aae9a95768768", kill_on_drop: false }`
[INFO] [stdout] 8873ecc84b47aaf449e207d5f166df3942d8f80cd8fdc51aae8aae9a95768768
