[INFO] cloning repository https://github.com/JacobHaig/powder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JacobHaig/powder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJacobHaig%2Fpowder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJacobHaig%2Fpowder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc949337eab279bffcee2ffed1bff11f8e906f03
[INFO] documenting JacobHaig/powder 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%2FJacobHaig%2Fpowder" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JacobHaig/powder 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/JacobHaig/powder
[INFO] finished tweaking git repo https://github.com/JacobHaig/powder
[INFO] tweaked toml for git repo https://github.com/JacobHaig/powder written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/JacobHaig/powder 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] d8d34f0f8225ca511eb5b27b7042155c9553d21d0198058cf0479a169ab5a11f
[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" "d8d34f0f8225ca511eb5b27b7042155c9553d21d0198058cf0479a169ab5a11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8d34f0f8225ca511eb5b27b7042155c9553d21d0198058cf0479a169ab5a11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8d34f0f8225ca511eb5b27b7042155c9553d21d0198058cf0479a169ab5a11f", kill_on_drop: false }`
[INFO] [stdout] d8d34f0f8225ca511eb5b27b7042155c9553d21d0198058cf0479a169ab5a11f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] d4bef3206d10d145b28735394c7e74df79ba0d69c358d0c3c73d3ab44c70c37b
[INFO] running `Command { std: "docker" "start" "-a" "d4bef3206d10d145b28735394c7e74df79ba0d69c358d0c3c73d3ab44c70c37b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling sdl2 v0.34.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling sdl2-sys v0.34.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]  Documenting powder 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(slice_group_by)]
[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 `powder`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name powder 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=0edf9f52b8571485 -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-5dfc9fd0ade52842.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-223536e793fd25f8.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-824dd7d6a01fa0c9.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-972771a370f7d92e.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a6effacb7a7efcfc.rmeta --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-232b905320adbe88.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d4bef3206d10d145b28735394c7e74df79ba0d69c358d0c3c73d3ab44c70c37b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4bef3206d10d145b28735394c7e74df79ba0d69c358d0c3c73d3ab44c70c37b", kill_on_drop: false }`
[INFO] [stdout] d4bef3206d10d145b28735394c7e74df79ba0d69c358d0c3c73d3ab44c70c37b