[INFO] cloning repository https://github.com/Niedzwiedzw/betrayal_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Niedzwiedzw/betrayal_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiedzwiedzw%2Fbetrayal_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiedzwiedzw%2Fbetrayal_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fff082f770b764c6183c368b2a83c47d1fd254f
[INFO] documenting Niedzwiedzw/betrayal_engine 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%2FNiedzwiedzw%2Fbetrayal_engine" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Niedzwiedzw/betrayal_engine 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 git repo https://github.com/Niedzwiedzw/betrayal_engine
[INFO] finished tweaking git repo https://github.com/Niedzwiedzw/betrayal_engine
[INFO] tweaked toml for git repo https://github.com/Niedzwiedzw/betrayal_engine written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Niedzwiedzw/betrayal_engine 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d736ee10493fa65ef661cb7204826f9d4369bc95122c81f13ed3910f61c9465c
[INFO] running `Command { std: "docker" "start" "-a" "d736ee10493fa65ef661cb7204826f9d4369bc95122c81f13ed3910f61c9465c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d736ee10493fa65ef661cb7204826f9d4369bc95122c81f13ed3910f61c9465c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d736ee10493fa65ef661cb7204826f9d4369bc95122c81f13ed3910f61c9465c", kill_on_drop: false }`
[INFO] [stdout] d736ee10493fa65ef661cb7204826f9d4369bc95122c81f13ed3910f61c9465c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 145605facebba06ff0d8b5562f30774d455a5965fce102f264f3ce131b49e58b
[INFO] running `Command { std: "docker" "start" "-a" "145605facebba06ff0d8b5562f30774d455a5965fce102f264f3ce131b49e58b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking nom v6.1.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking sled v0.34.6
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking procmaps v0.4.1
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking procfs v0.9.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]     Checking tokio v1.6.1
[INFO] [stderr]     Checking futures-util v0.3.15
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]  Documenting betrayal_engine 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(box_syntax)]
[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 `betrayal_engine`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name betrayal_engine 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 anyhow=/opt/rustwide/target/debug/deps/libanyhow-ed234740686b5bee.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-ad1d09bc25abc1b9.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-aa16d02b0fca8db4.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-869a94a546aedea6.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-9c436d67d12d7b9e.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-9472518d662ba992.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-1a8f644e32f8e10d.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-aba89f909a583c9f.rmeta --extern procfs=/opt/rustwide/target/debug/deps/libprocfs-703ebe98117fa9c5.rmeta --extern procmaps=/opt/rustwide/target/debug/deps/libprocmaps-d89dcc78ff2320e8.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-522ee9f77546e206.rmeta --extern sled=/opt/rustwide/target/debug/deps/libsled-3509a24ceb146663.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-29b36c681fdf1133.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-c5a949e406fe7dfe.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "145605facebba06ff0d8b5562f30774d455a5965fce102f264f3ce131b49e58b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "145605facebba06ff0d8b5562f30774d455a5965fce102f264f3ce131b49e58b", kill_on_drop: false }`
[INFO] [stdout] 145605facebba06ff0d8b5562f30774d455a5965fce102f264f3ce131b49e58b
