[INFO] cloning repository https://github.com/qqwa/amethyst_parser_syn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qqwa/amethyst_parser_syn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqqwa%2Famethyst_parser_syn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqqwa%2Famethyst_parser_syn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42bc1e0a06284ae8abac68beb07990fe09f84a38
[INFO] documenting qqwa/amethyst_parser_syn 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%2Fqqwa%2Famethyst_parser_syn" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qqwa/amethyst_parser_syn 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/qqwa/amethyst_parser_syn
[INFO] finished tweaking git repo https://github.com/qqwa/amethyst_parser_syn
[INFO] tweaked toml for git repo https://github.com/qqwa/amethyst_parser_syn written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/qqwa/amethyst_parser_syn 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 0cdf833bbb64787c3c5d207d9c7630bd1a44b9a73edf5b7dd28967059cfae46d
[INFO] running `Command { std: "docker" "start" "-a" "0cdf833bbb64787c3c5d207d9c7630bd1a44b9a73edf5b7dd28967059cfae46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cdf833bbb64787c3c5d207d9c7630bd1a44b9a73edf5b7dd28967059cfae46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cdf833bbb64787c3c5d207d9c7630bd1a44b9a73edf5b7dd28967059cfae46d", kill_on_drop: false }`
[INFO] [stdout] 0cdf833bbb64787c3c5d207d9c7630bd1a44b9a73edf5b7dd28967059cfae46d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 6089081e7993c390cbf8dc27e9300a0c07f30df199e5a3f83a66d9ebbf8c6ba4
[INFO] running `Command { std: "docker" "start" "-a" "6089081e7993c390cbf8dc27e9300a0c07f30df199e5a3f83a66d9ebbf8c6ba4", kill_on_drop: false }`
[INFO] [stderr]     Checking proc-macro2 v0.4.24
[INFO] [stderr]     Checking syn v0.15.22
[INFO] [stderr]  Documenting amethyst_parser_syn v0.1.0 (/opt/rustwide/workdir)
[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(box_patterns)]
[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 `amethyst_parser_syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name amethyst_parser_syn 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 clap=/opt/rustwide/target/debug/deps/libclap-afc00d0f70877de4.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-5b1ad7d72d683ff9.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-383d882c19d2493a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6089081e7993c390cbf8dc27e9300a0c07f30df199e5a3f83a66d9ebbf8c6ba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6089081e7993c390cbf8dc27e9300a0c07f30df199e5a3f83a66d9ebbf8c6ba4", kill_on_drop: false }`
[INFO] [stdout] 6089081e7993c390cbf8dc27e9300a0c07f30df199e5a3f83a66d9ebbf8c6ba4
