[INFO] fetching crate brioche 0.0.0...
[INFO] documenting brioche-0.0.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate brioche 0.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate brioche 0.0.0 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 crates.io crate brioche 0.0.0
[INFO] finished tweaking crates.io crate brioche 0.0.0
[INFO] tweaked toml for crates.io crate brioche 0.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate brioche 0.0.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c33023bccaff5ada9dbe94864410f93dba5aaeef7d79a9f2cc991e2c48efdb5
[INFO] running `Command { std: "docker" "start" "-a" "7c33023bccaff5ada9dbe94864410f93dba5aaeef7d79a9f2cc991e2c48efdb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c33023bccaff5ada9dbe94864410f93dba5aaeef7d79a9f2cc991e2c48efdb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c33023bccaff5ada9dbe94864410f93dba5aaeef7d79a9f2cc991e2c48efdb5", kill_on_drop: false }`
[INFO] [stdout] 7c33023bccaff5ada9dbe94864410f93dba5aaeef7d79a9f2cc991e2c48efdb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2412a90d9c36a7ffb6aa6ae56b35bfb9e0ed42620d3f2d8ed4f3badfaf5ffb7a
[INFO] running `Command { std: "docker" "start" "-a" "2412a90d9c36a7ffb6aa6ae56b35bfb9e0ed42620d3f2d8ed4f3badfaf5ffb7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.15
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking cesu8 v1.1.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling brioche-ducc-sys v0.1.2-brioche
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking brioche-ducc v0.1.2-brioche
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-error v0.4.9
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.9
[INFO] [stderr]    Compiling err-derive v0.2.2
[INFO] [stderr]    Compiling structopt-derive v0.4.2
[INFO] [stderr]     Checking structopt v0.3.9
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking brioche-ducc-serde v0.1.2-brioche
[INFO] [stderr]  Documenting brioche v0.0.0 (/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(inner_deref)]
[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 `brioche`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name brioche 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=5f67da1fca888294 -L dependency=/opt/rustwide/target/debug/deps --extern ducc=/opt/rustwide/target/debug/deps/libbrioche_ducc-55edf52dbc72e7c3.rmeta --extern ducc_serde=/opt/rustwide/target/debug/deps/libbrioche_ducc_serde-40de89cd380584c3.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-2ac4a09d3d644539.so --extern serde=/opt/rustwide/target/debug/deps/libserde-624d30c56dd5bdf8.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-84b3c963d56b872b.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-93ee46acab8622df.rmeta --cap-lints=warn --crate-version 0.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2412a90d9c36a7ffb6aa6ae56b35bfb9e0ed42620d3f2d8ed4f3badfaf5ffb7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2412a90d9c36a7ffb6aa6ae56b35bfb9e0ed42620d3f2d8ed4f3badfaf5ffb7a", kill_on_drop: false }`
[INFO] [stdout] 2412a90d9c36a7ffb6aa6ae56b35bfb9e0ed42620d3f2d8ed4f3badfaf5ffb7a