[INFO] cloning repository https://github.com/sjperkins/futureplay
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjperkins/futureplay" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjperkins%2Ffutureplay", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjperkins%2Ffutureplay'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0709ce4bb338d3687069a3602d29a3d3e102de21
[INFO] documenting sjperkins/futureplay against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjperkins%2Ffutureplay" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjperkins/futureplay 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 git repo https://github.com/sjperkins/futureplay
[INFO] finished tweaking git repo https://github.com/sjperkins/futureplay
[INFO] tweaked toml for git repo https://github.com/sjperkins/futureplay written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/sjperkins/futureplay 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]     Updating git repository `https://github.com/alexcrichton/futures-rs`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.2.0
[INFO] [stderr]   Downloaded crossbeam v0.2.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] a50c012b2607aab3d4c314089650233bee15f0beeb109a51de4c22310d0206e3
[INFO] running `Command { std: "docker" "start" "-a" "a50c012b2607aab3d4c314089650233bee15f0beeb109a51de4c22310d0206e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a50c012b2607aab3d4c314089650233bee15f0beeb109a51de4c22310d0206e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a50c012b2607aab3d4c314089650233bee15f0beeb109a51de4c22310d0206e3", kill_on_drop: false }`
[INFO] [stdout] a50c012b2607aab3d4c314089650233bee15f0beeb109a51de4c22310d0206e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 35dc3123d6e8af268789a074ee1b54cb791b83f4e5d94e9dbd52293ee6ab7bb4
[INFO] running `Command { std: "docker" "start" "-a" "35dc3123d6e8af268789a074ee1b54cb791b83f4e5d94e9dbd52293ee6ab7bb4", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking futures v0.1.10 (https://github.com/alexcrichton/futures-rs?branch=master#c53bad27)
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking num-complex v0.1.35
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking futures-cpupool v0.1.2 (https://github.com/alexcrichton/futures-rs?branch=master#c53bad27)
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]  Documenting futureplay v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 `futureplay`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name futureplay 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 chrono=/opt/rustwide/target/debug/deps/libchrono-21677cb6d35d5942.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-7e16f5abf59903bf.rmeta --extern futures_cpupool=/opt/rustwide/target/debug/deps/libfutures_cpupool-fb502a9c29b9d77f.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-182ba687f3311412.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "35dc3123d6e8af268789a074ee1b54cb791b83f4e5d94e9dbd52293ee6ab7bb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35dc3123d6e8af268789a074ee1b54cb791b83f4e5d94e9dbd52293ee6ab7bb4", kill_on_drop: false }`
[INFO] [stdout] 35dc3123d6e8af268789a074ee1b54cb791b83f4e5d94e9dbd52293ee6ab7bb4
