[INFO] fetching crate signalr_rs 0.1.4...
[INFO] documenting signalr_rs-0.1.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate signalr_rs 0.1.4 into /workspace/builds/worker-77/source
[INFO] validating manifest of crates.io crate signalr_rs 0.1.4 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 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-77/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" "+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 libflate_lz77 v1.1.0
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[INFO] [stderr]   Downloaded backtrace v0.3.57
[INFO] [stderr]   Downloaded tokio-util v0.6.6
[INFO] [stderr]   Downloaded tokio v1.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] a8d76929ee708a534dfac890d3a934a3b015d29a9079a2014ec7369291251605
[INFO] running `Command { std: "docker" "start" "-a" "a8d76929ee708a534dfac890d3a934a3b015d29a9079a2014ec7369291251605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8d76929ee708a534dfac890d3a934a3b015d29a9079a2014ec7369291251605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8d76929ee708a534dfac890d3a934a3b015d29a9079a2014ec7369291251605", kill_on_drop: false }`
[INFO] [stdout] a8d76929ee708a534dfac890d3a934a3b015d29a9079a2014ec7369291251605
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] 403172d112f55af1dfcb23ae80f47bbd991c76a378dfda655b87a53ead532241
[INFO] running `Command { std: "docker" "start" "-a" "403172d112f55af1dfcb23ae80f47bbd991c76a378dfda655b87a53ead532241", kill_on_drop: false }`
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[INFO] [stderr]     Checking actix-server v1.0.4
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[INFO] [stderr]     Checking serde_urlencoded v0.7.0
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[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 stable 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-1926b38af63d7c36.rmeta --extern actix_codec=/opt/rustwide/target/debug/deps/libactix_codec-ed7210959bafdceb.rmeta --extern actix_http=/opt/rustwide/target/debug/deps/libactix_http-64b5f8bc066df81a.rmeta --extern actix_web=/opt/rustwide/target/debug/deps/libactix_web-7a87b0534380897d.rmeta --extern awc=/opt/rustwide/target/debug/deps/libawc-69979cb58a0eea63.rmeta --extern backoff=/opt/rustwide/target/debug/deps/libbackoff-dc94eacfb2e11e8c.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-06135271d248c171.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-5a69d67e5415873b.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-2c5b9823132f869a.so --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-0aabf14fa25897d2.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-dfa71d6e0ac5d5ff.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-9dc7281ead592ac2.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern libflate=/opt/rustwide/target/debug/deps/liblibflate-f455ea1a2ce02587.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern openssl=/opt/rustwide/target/debug/deps/libopenssl-069ab4db5ef5d006.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-6792f3d5f7a30912.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-428bac75d165e4fa.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-1bf1618ddd7c3edb.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-4d74f0a5203a3e4b.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-e2a5a775ed5a5445.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "403172d112f55af1dfcb23ae80f47bbd991c76a378dfda655b87a53ead532241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "403172d112f55af1dfcb23ae80f47bbd991c76a378dfda655b87a53ead532241", kill_on_drop: false }`
[INFO] [stdout] 403172d112f55af1dfcb23ae80f47bbd991c76a378dfda655b87a53ead532241
