[INFO] fetching crate rsneat 0.1.0...
[INFO] checking rsneat-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rsneat 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate rsneat 0.1.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rsneat 0.1.0
[INFO] finished tweaking crates.io crate rsneat 0.1.0
[INFO] tweaked toml for crates.io crate rsneat 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 27 packages
[INFO] [stderr]       Adding autocfg v0.1.8 (latest: v1.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding rand v0.6.5 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_chacha v0.1.1 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.1.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rand_isaac v0.1.1 (latest: v0.3.0)
[INFO] [stderr]       Adding rand_jitter v0.1.4 (latest: v0.4.0)
[INFO] [stderr]       Adding rand_os v0.1.3 (latest: v0.2.2)
[INFO] [stderr]       Adding rand_pcg v0.1.2 (latest: v0.3.1)
[INFO] [stderr]       Adding rand_xorshift v0.1.1 (latest: v0.3.0)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c56cddb2b8fde96bf6e31fb6c9abb531d87c4198138faebea6198f1cdf4da10f
[INFO] running `Command { std: "docker" "start" "-a" "c56cddb2b8fde96bf6e31fb6c9abb531d87c4198138faebea6198f1cdf4da10f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c56cddb2b8fde96bf6e31fb6c9abb531d87c4198138faebea6198f1cdf4da10f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c56cddb2b8fde96bf6e31fb6c9abb531d87c4198138faebea6198f1cdf4da10f", kill_on_drop: false }`
[INFO] [stdout] c56cddb2b8fde96bf6e31fb6c9abb531d87c4198138faebea6198f1cdf4da10f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c773326a3daed204dcaf44f27b8ad4073edcb131e236d841577e6d2942b395b
[INFO] running `Command { std: "docker" "start" "-a" "1c773326a3daed204dcaf44f27b8ad4073edcb131e236d841577e6d2942b395b", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking rsneat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]  --> src/util.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rand;
[INFO] [stdout]   |     ^^^^ the item `rand` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]  --> src/util.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rand;
[INFO] [stdout]   |     ^^^^ the item `rand` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max_fitness` is never read
[INFO] [stdout]   --> src/population.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Species {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub max_fitness: f64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max_fitness` is never read
[INFO] [stdout]   --> src/population.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Species {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub max_fitness: f64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `Command { std: "docker" "inspect" "1c773326a3daed204dcaf44f27b8ad4073edcb131e236d841577e6d2942b395b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c773326a3daed204dcaf44f27b8ad4073edcb131e236d841577e6d2942b395b", kill_on_drop: false }`
[INFO] [stdout] 1c773326a3daed204dcaf44f27b8ad4073edcb131e236d841577e6d2942b395b