[INFO] crate ai 0.1.0 is already in cache
[INFO] building ai-0.1.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate ai 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ai 0.1.0 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9e1ee2402de76c094d0710d8e9ffa9ae4cc5756591c40eae444d4227efb32227
[INFO] running `"docker" "start" "-a" "9e1ee2402de76c094d0710d8e9ffa9ae4cc5756591c40eae444d4227efb32227"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "9e1ee2402de76c094d0710d8e9ffa9ae4cc5756591c40eae444d4227efb32227"`
[INFO] running `"docker" "rm" "-f" "9e1ee2402de76c094d0710d8e9ffa9ae4cc5756591c40eae444d4227efb32227"`
[INFO] [stdout] 9e1ee2402de76c094d0710d8e9ffa9ae4cc5756591c40eae444d4227efb32227
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 44208e59b44f94458f1653a5a9e293a102211eafc5d907446636e2f66c81aa1d
[INFO] running `"docker" "start" "-a" "44208e59b44f94458f1653a5a9e293a102211eafc5d907446636e2f66c81aa1d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `new_indv` is never read
[INFO] [stderr]    --> src/chromosome.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |         let mut new_indv = Vec::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_indv` is never read
[INFO] [stderr]    --> src/chromosome.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut new_indv = Vec::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chromosome.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 |         let mut individual = Chromosome::new();
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `"docker" "inspect" "44208e59b44f94458f1653a5a9e293a102211eafc5d907446636e2f66c81aa1d"`
[INFO] running `"docker" "rm" "-f" "44208e59b44f94458f1653a5a9e293a102211eafc5d907446636e2f66c81aa1d"`
[INFO] [stdout] 44208e59b44f94458f1653a5a9e293a102211eafc5d907446636e2f66c81aa1d