[INFO] cloning repository https://github.com/lucke84/playing_around_with_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lucke84/playing_around_with_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flucke84%2Fplaying_around_with_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flucke84%2Fplaying_around_with_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 258cf4006127f9f86cf750b991e2051b64bf8a08
[INFO] documenting lucke84/playing_around_with_rust against master#e1df625306f4136949e02612406f0c60df6008f3 for pr-96676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flucke84%2Fplaying_around_with_rust" "/workspace/builds/worker-69/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-69/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lucke84/playing_around_with_rust on toolchain e1df625306f4136949e02612406f0c60df6008f3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lucke84/playing_around_with_rust
[INFO] finished tweaking git repo https://github.com/lucke84/playing_around_with_rust
[INFO] tweaked toml for git repo https://github.com/lucke84/playing_around_with_rust written to /workspace/builds/worker-69/source/Cargo.toml
[INFO] crate git repo https://github.com/lucke84/playing_around_with_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "fetch" "--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-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "+e1df625306f4136949e02612406f0c60df6008f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdeb5c76682fda4a9e77de41b774c1c0e35f3d903bb5d1a0b8cff0da8076cd1c
[INFO] running `Command { std: "docker" "start" "-a" "fdeb5c76682fda4a9e77de41b774c1c0e35f3d903bb5d1a0b8cff0da8076cd1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdeb5c76682fda4a9e77de41b774c1c0e35f3d903bb5d1a0b8cff0da8076cd1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdeb5c76682fda4a9e77de41b774c1c0e35f3d903bb5d1a0b8cff0da8076cd1c", kill_on_drop: false }`
[INFO] [stdout] fdeb5c76682fda4a9e77de41b774c1c0e35f3d903bb5d1a0b8cff0da8076cd1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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=forbid" "-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" "+e1df625306f4136949e02612406f0c60df6008f3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0167ca0dd431e7b3e37e44b9e771d31fd4ab8d94f421a3adb33667e5721b71cf
[INFO] running `Command { std: "docker" "start" "-a" "0167ca0dd431e7b3e37e44b9e771d31fd4ab8d94f421a3adb33667e5721b71cf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting playing_around_with_rust v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let j = (i = 6);                            // the value of an assignment is an empty tuple: so j has the value (), not 6
[INFO] [stdout]    |             ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 -     let j = (i = 6);                            // the value of an assignment is an empty tuple: so j has the value (), not 6
[INFO] [stdout] 37 +     let j = i = 6;                            // the value of an assignment is an empty tuple: so j has the value (), not 6
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "0167ca0dd431e7b3e37e44b9e771d31fd4ab8d94f421a3adb33667e5721b71cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0167ca0dd431e7b3e37e44b9e771d31fd4ab8d94f421a3adb33667e5721b71cf", kill_on_drop: false }`
[INFO] [stdout] 0167ca0dd431e7b3e37e44b9e771d31fd4ab8d94f421a3adb33667e5721b71cf