[INFO] cloning repository https://github.com/archer884/vchk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/archer884/vchk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcher884%2Fvchk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcher884%2Fvchk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0cfd9061ebad437378fabd298698aa89784daf7
[INFO] documenting archer884/vchk 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%2Farcher884%2Fvchk" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/archer884/vchk 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/archer884/vchk
[INFO] finished tweaking git repo https://github.com/archer884/vchk
[INFO] tweaked toml for git repo https://github.com/archer884/vchk written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/archer884/vchk 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 4aeab5f78c385f67e22882140b1cf5b989973b87c1a91ff33bdba830494eb18a
[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" "4aeab5f78c385f67e22882140b1cf5b989973b87c1a91ff33bdba830494eb18a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4aeab5f78c385f67e22882140b1cf5b989973b87c1a91ff33bdba830494eb18a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aeab5f78c385f67e22882140b1cf5b989973b87c1a91ff33bdba830494eb18a", kill_on_drop: false }`
[INFO] [stdout] 4aeab5f78c385f67e22882140b1cf5b989973b87c1a91ff33bdba830494eb18a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 51c84f7b4ba49461d8732abc27470af33f54a12069fdb3de57e32494eac53329
[INFO] running `Command { std: "docker" "start" "-a" "51c84f7b4ba49461d8732abc27470af33f54a12069fdb3de57e32494eac53329", kill_on_drop: false }`
[INFO] [stderr]  Documenting vchk v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking vchk v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::io::BufReadExt`
[INFO] [stdout]  --> src/main.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{BufReader, BufReadExt};
[INFO] [stdout]   |                          ^^^^^^^^^^
[INFO] [stdout]   |                          |
[INFO] [stdout]   |                          no `BufReadExt` in `io`
[INFO] [stdout]   |                          help: a similar name exists in the module: `BufRead`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, env, fs, io, path)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `vchk`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name vchk 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=78c47c75dd7bfe66 -L dependency=/opt/rustwide/target/debug/deps --extern vword=/opt/rustwide/target/debug/deps/libvword-1219a2b20273b879.rmeta --cap-lints=warn --crate-version 0.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "51c84f7b4ba49461d8732abc27470af33f54a12069fdb3de57e32494eac53329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51c84f7b4ba49461d8732abc27470af33f54a12069fdb3de57e32494eac53329", kill_on_drop: false }`
[INFO] [stdout] 51c84f7b4ba49461d8732abc27470af33f54a12069fdb3de57e32494eac53329