[INFO] fetching crate signalr_rs 0.1.4...
[INFO] documenting signalr_rs-0.1.4 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate signalr_rs 0.1.4 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate signalr_rs 0.1.4 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate signalr_rs 0.1.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate signalr_rs 0.1.4
[INFO] tweaked toml for crates.io crate signalr_rs 0.1.4 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate crates.io crate signalr_rs 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5b96b105d6ad79053817b0624efc0b35043358d0b38de2e54c91baf50f5405e
[INFO] running `Command { std: "docker" "start" "-a" "d5b96b105d6ad79053817b0624efc0b35043358d0b38de2e54c91baf50f5405e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5b96b105d6ad79053817b0624efc0b35043358d0b38de2e54c91baf50f5405e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5b96b105d6ad79053817b0624efc0b35043358d0b38de2e54c91baf50f5405e", kill_on_drop: false }`
[INFO] [stdout] d5b96b105d6ad79053817b0624efc0b35043358d0b38de2e54c91baf50f5405e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55359c070c432d1e424f1face7a0435fe28c2e59179e2bc591384f1d8cd49e39
[INFO] running `Command { std: "docker" "start" "-a" "55359c070c432d1e424f1face7a0435fe28c2e59179e2bc591384f1d8cd49e39", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking slab v0.4.3
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[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling cc v1.0.67
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[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
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[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking actix-codec v0.3.0
[INFO] [stderr]     Checking actix-threadpool v0.3.3
[INFO] [stderr]     Checking actix-rt v1.1.1
[INFO] [stderr]     Checking actix-service v1.0.6
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking actix v0.11.1
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking trust-dns-proto v0.19.7
[INFO] [stderr]     Checking actix-utils v2.0.0
[INFO] [stderr]     Checking actix-tls v2.0.0
[INFO] [stderr]     Checking actix-server v1.0.4
[INFO] [stderr]     Checking actix-testing v1.0.1
[INFO] [stderr]     Checking trust-dns-resolver v0.19.7
[INFO] [stderr]     Checking actix-connect v2.0.0
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking actix-router v0.2.7
[INFO] [stderr]     Checking actix-http v2.2.0
[INFO] [stderr]     Checking awc v2.0.3
[INFO] [stderr]     Checking actix-web v3.3.2
[INFO] [stderr]  Documenting signalr_rs v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::option::NoneError`
[INFO] [stdout]   --> src/hub/client.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use std::option::NoneError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^ no `NoneError` in `option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[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] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `signalr_rs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name signalr_rs src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern actix=/opt/rustwide/target/debug/deps/libactix-4c0dfb74bbd3e5c9.rmeta --extern actix_codec=/opt/rustwide/target/debug/deps/libactix_codec-dda332048c5c2afe.rmeta --extern actix_http=/opt/rustwide/target/debug/deps/libactix_http-ef7f6504683316f1.rmeta --extern actix_web=/opt/rustwide/target/debug/deps/libactix_web-7645d663ec06d01a.rmeta --extern awc=/opt/rustwide/target/debug/deps/libawc-ca6f01dd4c5094c8.rmeta --extern backoff=/opt/rustwide/target/debug/deps/libbackoff-67698906f180680a.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-0feadca7abf19989.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-be6cb9a7be86933c.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-5c1ce14e3ff0c3e9.so --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-695ba22da1090f84.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-8f585859816778ee.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-0b95c1af1f13d1c5.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-5e37eee3e84fafab.rmeta --extern libflate=/opt/rustwide/target/debug/deps/liblibflate-dde870da37bcfbcb.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-56a705720bafac8d.rmeta --extern openssl=/opt/rustwide/target/debug/deps/libopenssl-7a2992f73f6dd1c7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-c6ee4927d0792347.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-45bf287ed7d695b9.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-7df011899ea65002.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-8fc7e55e5fbc1dc0.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-2196de9cbf08f45a.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "55359c070c432d1e424f1face7a0435fe28c2e59179e2bc591384f1d8cd49e39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55359c070c432d1e424f1face7a0435fe28c2e59179e2bc591384f1d8cd49e39", kill_on_drop: false }`
[INFO] [stdout] 55359c070c432d1e424f1face7a0435fe28c2e59179e2bc591384f1d8cd49e39
