[INFO] fetching crate follow 0.1.5...
[INFO] documenting follow-0.1.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate follow 0.1.5 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate follow 0.1.5 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate follow 0.1.5
[INFO] finished tweaking crates.io crate follow 0.1.5
[INFO] tweaked toml for crates.io crate follow 0.1.5 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded strsim v0.6.0
[INFO] [stderr]   Downloaded docopt v0.7.0
[INFO] [stderr]   Downloaded timebomb v0.1.2
[INFO] [stderr]   Downloaded atom v0.3.5
[INFO] [stderr]   Downloaded pulse v0.5.3
[INFO] [stderr]   Downloaded fern v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a75b8014bfc703484ba594556ab3d6083963bd1c8e3c02eb3e19745f4af4c128
[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" "a75b8014bfc703484ba594556ab3d6083963bd1c8e3c02eb3e19745f4af4c128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a75b8014bfc703484ba594556ab3d6083963bd1c8e3c02eb3e19745f4af4c128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a75b8014bfc703484ba594556ab3d6083963bd1c8e3c02eb3e19745f4af4c128", kill_on_drop: false }`
[INFO] [stdout] a75b8014bfc703484ba594556ab3d6083963bd1c8e3c02eb3e19745f4af4c128
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-08-29" "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] c62dec03736b2ea11459035f98056cd5bea1ac843c1064b3eb0ff8284f078858
[INFO] running `Command { std: "docker" "start" "-a" "c62dec03736b2ea11459035f98056cd5bea1ac843c1064b3eb0ff8284f078858", kill_on_drop: false }`
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking fern v0.3.5
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking docopt v0.7.0
[INFO] [stderr]  Documenting follow v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/worker.rs:180:27
[INFO] [stdout]     |
[INFO] [stdout] 180 |                 return Ok((cursor..len));
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/worker.rs:189:27
[INFO] [stdout]     |
[INFO] [stdout] 189 |                 return Ok((0..len));
[INFO] [stdout]     |                           ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/main.rs:143:28
[INFO] [stdout]     |
[INFO] [stdout] 143 |         Some((Width(w @ 20 ... 200), _)) => {
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.54s
[INFO] running `Command { std: "docker" "inspect" "c62dec03736b2ea11459035f98056cd5bea1ac843c1064b3eb0ff8284f078858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c62dec03736b2ea11459035f98056cd5bea1ac843c1064b3eb0ff8284f078858", kill_on_drop: false }`
[INFO] [stdout] c62dec03736b2ea11459035f98056cd5bea1ac843c1064b3eb0ff8284f078858