[INFO] fetching crate nn 0.1.6...
[INFO] checking nn-0.1.6 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate nn 0.1.6 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate nn 0.1.6 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nn 0.1.6
[INFO] finished tweaking crates.io crate nn 0.1.6
[INFO] tweaked toml for crates.io crate nn 0.1.6 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f89f35e7559c9b6862b9fe7422527fd23aa554517d14881599ef1458014655e8
[INFO] running `Command { std: "docker" "start" "-a" "f89f35e7559c9b6862b9fe7422527fd23aa554517d14881599ef1458014655e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f89f35e7559c9b6862b9fe7422527fd23aa554517d14881599ef1458014655e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f89f35e7559c9b6862b9fe7422527fd23aa554517d14881599ef1458014655e8", kill_on_drop: false }`
[INFO] [stdout] f89f35e7559c9b6862b9fe7422527fd23aa554517d14881599ef1458014655e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "RUSTFLAGS=--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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 901e409e2158ee46b0db6c11952c1c373bc4ce91ed2f4cfc75a225ca68325458
[INFO] running `Command { std: "docker" "start" "-a" "901e409e2158ee46b0db6c11952c1c373bc4ce91ed2f4cfc75a225ca68325458", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking nn v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]    --> src/lib.rs:187:24
[INFO] [stdout]     |
[INFO] [stdout] 187 | #[derive(Debug, Clone, RustcDecodable, RustcEncodable)]
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]    --> src/lib.rs:187:24
[INFO] [stdout]     |
[INFO] [stdout] 187 | #[derive(Debug, Clone, RustcDecodable, RustcEncodable)]
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]    --> src/lib.rs:187:40
[INFO] [stdout]     |
[INFO] [stdout] 187 | #[derive(Debug, Clone, RustcDecodable, RustcEncodable)]
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]    --> src/lib.rs:187:40
[INFO] [stdout]     |
[INFO] [stdout] 187 | #[derive(Debug, Clone, RustcDecodable, RustcEncodable)]
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:361:17
[INFO] [stdout]     |
[INFO] [stdout] 361 |             let mut layer = &mut self.layers[layer_index];
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:364:21
[INFO] [stdout]     |
[INFO] [stdout] 364 |                 let mut node = &mut layer[node_index];
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:361:17
[INFO] [stdout]     |
[INFO] [stdout] 361 |             let mut layer = &mut self.layers[layer_index];
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:364:21
[INFO] [stdout]     |
[INFO] [stdout] 364 |                 let mut node = &mut layer[node_index];
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:394:21
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 let mut node_error;
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:410:25
[INFO] [stdout]     |
[INFO] [stdout] 410 |                     let mut prev_layer_result;
[INFO] [stdout]     |                         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:394:21
[INFO] [stdout]     |
[INFO] [stdout] 394 |                 let mut node_error;
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:410:25
[INFO] [stdout]     |
[INFO] [stdout] 410 |                     let mut prev_layer_result;
[INFO] [stdout]     |                         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "901e409e2158ee46b0db6c11952c1c373bc4ce91ed2f4cfc75a225ca68325458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "901e409e2158ee46b0db6c11952c1c373bc4ce91ed2f4cfc75a225ca68325458", kill_on_drop: false }`
[INFO] [stdout] 901e409e2158ee46b0db6c11952c1c373bc4ce91ed2f4cfc75a225ca68325458