[INFO] cloning repository https://github.com/selenologist/cc-emitter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/selenologist/cc-emitter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fselenologist%2Fcc-emitter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fselenologist%2Fcc-emitter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ad2a1fd3ddfc6a5d4372181f5bada5b3d258fd8
[INFO] documenting selenologist/cc-emitter against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fselenologist%2Fcc-emitter" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/selenologist/cc-emitter on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/selenologist/cc-emitter
[INFO] finished tweaking git repo https://github.com/selenologist/cc-emitter
[INFO] tweaked toml for git repo https://github.com/selenologist/cc-emitter written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/selenologist/cc-emitter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0dcc836d361f0704bfaa47fd8f244a6c554597ef332f23565e65cdc3ca859aa4
[INFO] running `Command { std: "docker" "start" "-a" "0dcc836d361f0704bfaa47fd8f244a6c554597ef332f23565e65cdc3ca859aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dcc836d361f0704bfaa47fd8f244a6c554597ef332f23565e65cdc3ca859aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dcc836d361f0704bfaa47fd8f244a6c554597ef332f23565e65cdc3ca859aa4", kill_on_drop: false }`
[INFO] [stdout] 0dcc836d361f0704bfaa47fd8f244a6c554597ef332f23565e65cdc3ca859aa4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1915132b6f3f6d0442cbe89336a9a1772e124e26e4a31380ca229689a5281290
[INFO] running `Command { std: "docker" "start" "-a" "1915132b6f3f6d0442cbe89336a9a1772e124e26e4a31380ca229689a5281290", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking bitflags v0.3.3
[INFO] [stderr]     Checking memalloc v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking alsa v0.2.2
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]     Checking midir v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]  Documenting cc-emitter 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(result_map_or_else)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cc-emitter`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name cc_emitter src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=597b7c55ca0107bc -L dependency=/opt/rustwide/target/debug/deps --extern midir=/opt/rustwide/target/debug/deps/libmidir-43734ecea69bfc85.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-3f1050d0debf581d.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-2ba0b95a1db9860d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1915132b6f3f6d0442cbe89336a9a1772e124e26e4a31380ca229689a5281290", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1915132b6f3f6d0442cbe89336a9a1772e124e26e4a31380ca229689a5281290", kill_on_drop: false }`
[INFO] [stdout] 1915132b6f3f6d0442cbe89336a9a1772e124e26e4a31380ca229689a5281290