[INFO] cloning repository https://github.com/iminotech/cc-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iminotech/cc-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiminotech%2Fcc-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiminotech%2Fcc-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b285222cc4c408e6ce0217b5094cfb31006f9ba
[INFO] documenting iminotech/cc-rust against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiminotech%2Fcc-rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iminotech/cc-rust on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iminotech/cc-rust
[INFO] finished tweaking git repo https://github.com/iminotech/cc-rust
[INFO] tweaked toml for git repo https://github.com/iminotech/cc-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/iminotech/cc-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "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] de6d4ec480f0547caedceda11259e85b65b1b6fdbed0310ad656c456d6698a8d
[INFO] running `Command { std: "docker" "start" "-a" "de6d4ec480f0547caedceda11259e85b65b1b6fdbed0310ad656c456d6698a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de6d4ec480f0547caedceda11259e85b65b1b6fdbed0310ad656c456d6698a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de6d4ec480f0547caedceda11259e85b65b1b6fdbed0310ad656c456d6698a8d", kill_on_drop: false }`
[INFO] [stdout] de6d4ec480f0547caedceda11259e85b65b1b6fdbed0310ad656c456d6698a8d
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38f43bc4c566502d0f90dddbd7f4a4ae1e6747e195eaf6e7a57cee4c0b8b5bc9
[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" "38f43bc4c566502d0f90dddbd7f4a4ae1e6747e195eaf6e7a57cee4c0b8b5bc9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting cc-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: empty character literal
[INFO] [stdout]   --> src/prototypes/mod.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |   if &read == ''
[INFO] [stdout]    |                ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing `in` in `for` loop
[INFO] [stdout]   --> src/prototypes/mod.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 |   for arg.len() in _ {
[INFO] [stdout]    |          ^ help: try adding `in` here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected expression, found `.`
[INFO] [stdout]   --> src/prototypes/mod.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 |   for arg.len() in _ {
[INFO] [stdout]    |          ^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `cc-rust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name cc_rust src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "38f43bc4c566502d0f90dddbd7f4a4ae1e6747e195eaf6e7a57cee4c0b8b5bc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f43bc4c566502d0f90dddbd7f4a4ae1e6747e195eaf6e7a57cee4c0b8b5bc9", kill_on_drop: false }`
[INFO] [stdout] 38f43bc4c566502d0f90dddbd7f4a4ae1e6747e195eaf6e7a57cee4c0b8b5bc9