[INFO] fetching crate tallystick 0.4.3...
[INFO] documenting tallystick-0.4.3 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate tallystick 0.4.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate tallystick 0.4.3 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 crates.io crate tallystick 0.4.3
[INFO] finished tweaking crates.io crate tallystick 0.4.3
[INFO] tweaked toml for crates.io crate tallystick 0.4.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "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] 2fa7b3489ac43d628e9bd5388658f62054ff04d7ec1cf08563e5cb189734abb3
[INFO] running `Command { std: "docker" "start" "-a" "2fa7b3489ac43d628e9bd5388658f62054ff04d7ec1cf08563e5cb189734abb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fa7b3489ac43d628e9bd5388658f62054ff04d7ec1cf08563e5cb189734abb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fa7b3489ac43d628e9bd5388658f62054ff04d7ec1cf08563e5cb189734abb3", kill_on_drop: false }`
[INFO] [stdout] 2fa7b3489ac43d628e9bd5388658f62054ff04d7ec1cf08563e5cb189734abb3
[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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dce317ccadb82a11a4622623a4d83232a225fbba856bae90d1a4fff3cc6c003
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1dce317ccadb82a11a4622623a4d83232a225fbba856bae90d1a4fff3cc6c003", kill_on_drop: false }`
[INFO] [stderr]     Checking fixedbitset v0.4.0
[INFO] [stderr]     Checking partial-min-max v0.4.0
[INFO] [stderr]     Checking ahash v0.7.4
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking indexmap v1.7.0
[INFO] [stderr]     Checking petgraph v0.6.0
[INFO] [stderr]  Documenting tallystick v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:13:34
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(feature = "nightly", feature(specialization))]
[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 `tallystick`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name tallystick src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="nightly"' --cfg 'feature="serde"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-4389126a1caff342.so --extern failure=/opt/rustwide/target/debug/deps/libfailure-bd58680c6087d756.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-30a048787747cf25.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-397d8ff81ee88563.rmeta --extern partial_min_max=/opt/rustwide/target/debug/deps/libpartial_min_max-650aac50283de873.rmeta --extern petgraph=/opt/rustwide/target/debug/deps/libpetgraph-99a1bbe1d3f96fa3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-282f52a09d9f3f9a.rmeta --cap-lints=warn --crate-version 0.4.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1dce317ccadb82a11a4622623a4d83232a225fbba856bae90d1a4fff3cc6c003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dce317ccadb82a11a4622623a4d83232a225fbba856bae90d1a4fff3cc6c003", kill_on_drop: false }`
[INFO] [stdout] 1dce317ccadb82a11a4622623a4d83232a225fbba856bae90d1a4fff3cc6c003
