[INFO] fetching crate prty_bitgraph 0.1.1...
[INFO] documenting prty_bitgraph-0.1.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate prty_bitgraph 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate prty_bitgraph 0.1.1 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 prty_bitgraph 0.1.1
[INFO] finished tweaking crates.io crate prty_bitgraph 0.1.1
[INFO] tweaked toml for crates.io crate prty_bitgraph 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-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] 4a1ff96e5b324eafb21f930cc1ddf446c0f06f26c9d1d4d67a7c1787afd7b25d
[INFO] running `Command { std: "docker" "start" "-a" "4a1ff96e5b324eafb21f930cc1ddf446c0f06f26c9d1d4d67a7c1787afd7b25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a1ff96e5b324eafb21f930cc1ddf446c0f06f26c9d1d4d67a7c1787afd7b25d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a1ff96e5b324eafb21f930cc1ddf446c0f06f26c9d1d4d67a7c1787afd7b25d", kill_on_drop: false }`
[INFO] [stdout] 4a1ff96e5b324eafb21f930cc1ddf446c0f06f26c9d1d4d67a7c1787afd7b25d
[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] e85242a68ac8eabe35001c5b8ee21beef4e0a2b41658b3f76b0d92de5e37c0f4
[INFO] running `Command { std: "docker" "start" "-a" "e85242a68ac8eabe35001c5b8ee21beef4e0a2b41658b3f76b0d92de5e37c0f4", kill_on_drop: false }`
[INFO] [stderr]     Checking prty_fmtmodifier v0.1.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]  Documenting prty_bitgraph v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_remove_item)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `vec_remove_item`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_remove_item)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `prty_bitgraph`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name prty_bitgraph src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6081c5b404664276 -L dependency=/opt/rustwide/target/debug/deps --extern fnv=/opt/rustwide/target/debug/deps/libfnv-dd37fcbf4810fcb5.rmeta --extern prty_fmtmodifier=/opt/rustwide/target/debug/deps/libprty_fmtmodifier-c2f9e297de446ffb.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e85242a68ac8eabe35001c5b8ee21beef4e0a2b41658b3f76b0d92de5e37c0f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e85242a68ac8eabe35001c5b8ee21beef4e0a2b41658b3f76b0d92de5e37c0f4", kill_on_drop: false }`
[INFO] [stdout] e85242a68ac8eabe35001c5b8ee21beef4e0a2b41658b3f76b0d92de5e37c0f4