[INFO] cloning repository https://github.com/jpalvarezl/async_rocket_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jpalvarezl/async_rocket_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjpalvarezl%2Fasync_rocket_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjpalvarezl%2Fasync_rocket_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a51a900bc19da357cb53c34c71892fa1ea8f1d0b
[INFO] documenting jpalvarezl/async_rocket_playground against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjpalvarezl%2Fasync_rocket_playground" "/workspace/builds/worker-101/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-101/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jpalvarezl/async_rocket_playground 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] removed /workspace/builds/worker-101/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/jpalvarezl/async_rocket_playground
[INFO] finished tweaking git repo https://github.com/jpalvarezl/async_rocket_playground
[INFO] tweaked toml for git repo https://github.com/jpalvarezl/async_rocket_playground written to /workspace/builds/worker-101/source/Cargo.toml
[INFO] crate git repo https://github.com/jpalvarezl/async_rocket_playground 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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] 14fb60a943e33eb529adcf906ee6efef596995dee3e6dc9d88b2f454cec785ea
[INFO] running `Command { std: "docker" "start" "-a" "14fb60a943e33eb529adcf906ee6efef596995dee3e6dc9d88b2f454cec785ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14fb60a943e33eb529adcf906ee6efef596995dee3e6dc9d88b2f454cec785ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14fb60a943e33eb529adcf906ee6efef596995dee3e6dc9d88b2f454cec785ea", kill_on_drop: false }`
[INFO] [stdout] 14fb60a943e33eb529adcf906ee6efef596995dee3e6dc9d88b2f454cec785ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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 }`
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[INFO] running `Command { std: "docker" "start" "-a" "ab6052aa63c1364b0fb61717b47dfe44b104d3e362fa41aca4c66e5fe56afb82", kill_on_drop: false }`
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[INFO] [stderr]    Compiling devise v0.3.0 (https://github.com/SergioBenitez/Devise.git?rev=df00b5#df00b516)
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[INFO] [stderr]     Checking rocket_http v0.5.0-dev (https://github.com/SergioBenitez/Rocket?rev=4f3511786cb8b6540124b867591c7c5a6933409e#4f351178)
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.3
[INFO] [stderr]    Compiling rocket_codegen v0.5.0-dev (https://github.com/SergioBenitez/Rocket?rev=4f3511786cb8b6540124b867591c7c5a6933409e#4f351178)
[INFO] [stderr]     Checking rocket_contrib v0.5.0-dev (https://github.com/SergioBenitez/Rocket?rev=4f3511786cb8b6540124b867591c7c5a6933409e#4f351178)
[INFO] [stderr]  Documenting async_rocket_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure, proc_macro_hygiene, decl_macro, option_result_contains)]
[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 `async_rocket_playground`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name async_rocket_playground src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-e8ccf2c40cdd6929.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-dd82ba04bfcce533.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern r2d2=/opt/rustwide/target/debug/deps/libr2d2-f4d98b1ab6860da7.rmeta --extern redis=/opt/rustwide/target/debug/deps/libredis-d013d872f73c2727.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-71ec98f6786fb30e.rmeta --extern rocket=/opt/rustwide/target/debug/deps/librocket-eb04e726808eb838.rmeta --extern rocket_codegen=/opt/rustwide/target/debug/deps/librocket_codegen-603835268dd47c8a.so --extern rocket_contrib=/opt/rustwide/target/debug/deps/librocket_contrib-e9f670739d9e187d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e73f677a7ecf21be.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-065818f84a148b36.rmeta --extern serde_repr=/opt/rustwide/target/debug/deps/libserde_repr-bfaf135514392dc4.so --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ba338b5466e747ad.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ab6052aa63c1364b0fb61717b47dfe44b104d3e362fa41aca4c66e5fe56afb82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab6052aa63c1364b0fb61717b47dfe44b104d3e362fa41aca4c66e5fe56afb82", kill_on_drop: false }`
[INFO] [stdout] ab6052aa63c1364b0fb61717b47dfe44b104d3e362fa41aca4c66e5fe56afb82
