[INFO] fetching crate mutf8 0.4.1...
[INFO] documenting mutf8-0.4.1 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate mutf8 0.4.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mutf8 0.4.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutf8 0.4.1
[INFO] finished tweaking crates.io crate mutf8 0.4.1
[INFO] tweaked toml for crates.io crate mutf8 0.4.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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-2020-10-09" "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] 017e883e115d92b12e63103680d0bb3257a8e2bcf184e08ddbcda0d54877c091
[INFO] running `Command { std: "docker" "start" "-a" "017e883e115d92b12e63103680d0bb3257a8e2bcf184e08ddbcda0d54877c091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "017e883e115d92b12e63103680d0bb3257a8e2bcf184e08ddbcda0d54877c091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "017e883e115d92b12e63103680d0bb3257a8e2bcf184e08ddbcda0d54877c091", kill_on_drop: false }`
[INFO] [stdout] 017e883e115d92b12e63103680d0bb3257a8e2bcf184e08ddbcda0d54877c091
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0804bb581f367589d7baee832ea0740b41abe1d3590519ab9457babb59bafe7
[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" "a0804bb581f367589d7baee832ea0740b41abe1d3590519ab9457babb59bafe7", kill_on_drop: false }`
[INFO] [stderr]  Documenting mutf8 v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/mutf8.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 72 |             bits += ((byte4 as u32) & 0x3F);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "a0804bb581f367589d7baee832ea0740b41abe1d3590519ab9457babb59bafe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0804bb581f367589d7baee832ea0740b41abe1d3590519ab9457babb59bafe7", kill_on_drop: false }`
[INFO] [stdout] a0804bb581f367589d7baee832ea0740b41abe1d3590519ab9457babb59bafe7
