[INFO] cloning repository https://github.com/jssandh2/rust-systems
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jssandh2/rust-systems" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjssandh2%2Frust-systems", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjssandh2%2Frust-systems'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8aa595ec1d2e3e73ce837435c99a87ad84324bbb
[INFO] documenting jssandh2/rust-systems against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjssandh2%2Frust-systems" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jssandh2/rust-systems 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 git repo https://github.com/jssandh2/rust-systems
[INFO] finished tweaking git repo https://github.com/jssandh2/rust-systems
[INFO] tweaked toml for git repo https://github.com/jssandh2/rust-systems written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/jssandh2/rust-systems already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 144e8b8663370b2ac983ded036b22fc845ffb8bc910371dac0f9edfe1c50ae03
[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" "144e8b8663370b2ac983ded036b22fc845ffb8bc910371dac0f9edfe1c50ae03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "144e8b8663370b2ac983ded036b22fc845ffb8bc910371dac0f9edfe1c50ae03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "144e8b8663370b2ac983ded036b22fc845ffb8bc910371dac0f9edfe1c50ae03", kill_on_drop: false }`
[INFO] [stdout] 144e8b8663370b2ac983ded036b22fc845ffb8bc910371dac0f9edfe1c50ae03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stdout] 30435d915417e9504ed9c82125d61ba91b288644684c31e3ecb882eb48966b5c
[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" "30435d915417e9504ed9c82125d61ba91b288644684c31e3ecb882eb48966b5c", kill_on_drop: false }`
[INFO] [stderr]  Documenting rust-systems v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/test/primitive_types.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let b = (0);  // Normal zero
[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 assigned value
[INFO] [stdout]   --> src/test/functions.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x = (y = 6); // `x` has the value `()`, _NOT_ 6
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.91s
[INFO] running `Command { std: "docker" "inspect" "30435d915417e9504ed9c82125d61ba91b288644684c31e3ecb882eb48966b5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30435d915417e9504ed9c82125d61ba91b288644684c31e3ecb882eb48966b5c", kill_on_drop: false }`
[INFO] [stdout] 30435d915417e9504ed9c82125d61ba91b288644684c31e3ecb882eb48966b5c