[INFO] crate ai 0.1.0 is already in cache
[INFO] building ai-0.1.0 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate ai 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate ai 0.1.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ai 0.1.0
[INFO] finished tweaking crates.io crate ai 0.1.0
[INFO] tweaked toml for crates.io crate ai 0.1.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 4bb86265fedc5583adce62251a92b30614486f37272fbd770e2e960b23633b4a
[INFO] running `Command { std: "docker" "start" "-a" "4bb86265fedc5583adce62251a92b30614486f37272fbd770e2e960b23633b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bb86265fedc5583adce62251a92b30614486f37272fbd770e2e960b23633b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bb86265fedc5583adce62251a92b30614486f37272fbd770e2e960b23633b4a", kill_on_drop: false }`
[INFO] [stdout] 4bb86265fedc5583adce62251a92b30614486f37272fbd770e2e960b23633b4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 357e4ef409b6369aec3da39659f0d914452a56629841d6d26b7791a785ed911a
[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" "357e4ef409b6369aec3da39659f0d914452a56629841d6d26b7791a785ed911a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.64s
[INFO] running `Command { std: "docker" "inspect" "357e4ef409b6369aec3da39659f0d914452a56629841d6d26b7791a785ed911a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "357e4ef409b6369aec3da39659f0d914452a56629841d6d26b7791a785ed911a", kill_on_drop: false }`
[INFO] [stdout] 357e4ef409b6369aec3da39659f0d914452a56629841d6d26b7791a785ed911a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", 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] cfc1e33dcc3f4ba44ba21ee6e882a4178279e47beb4e4d32e761c4bab0fc8462
[INFO] running `Command { std: "docker" "start" "-a" "cfc1e33dcc3f4ba44ba21ee6e882a4178279e47beb4e4d32e761c4bab0fc8462", kill_on_drop: false }`
[INFO] [stderr]    Compiling ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `new_indv` is never read
[INFO] [stdout]    --> src/chromosome.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |         let mut new_indv = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_indv` is never read
[INFO] [stdout]    --> src/chromosome.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let mut new_indv = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chromosome.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut individual = Chromosome::new();
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "cfc1e33dcc3f4ba44ba21ee6e882a4178279e47beb4e4d32e761c4bab0fc8462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfc1e33dcc3f4ba44ba21ee6e882a4178279e47beb4e4d32e761c4bab0fc8462", kill_on_drop: false }`
[INFO] [stdout] cfc1e33dcc3f4ba44ba21ee6e882a4178279e47beb4e4d32e761c4bab0fc8462