[INFO] crate aristeia 0.2.3 is already in cache
[INFO] extracting crate aristeia 0.2.3 into work/ex/beta-1.37-6/sources/1.36.0/reg/aristeia/0.2.3
[INFO] extracting crate aristeia 0.2.3 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/aristeia/0.2.3
[INFO] validating manifest of aristeia-0.2.3 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of aristeia-0.2.3 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing aristeia-0.2.3
[INFO] finished frobbing aristeia-0.2.3
[INFO] frobbed toml for aristeia-0.2.3 written to work/ex/beta-1.37-6/sources/1.36.0/reg/aristeia/0.2.3/Cargo.toml
[INFO] started frobbing aristeia-0.2.3
[INFO] finished frobbing aristeia-0.2.3
[INFO] frobbed toml for aristeia-0.2.3 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/aristeia/0.2.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing aristeia-0.2.3 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/aristeia/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 02c7212a73852e8fc3ca26f1054704e7e39c98ea39ddf4ba492939e9e50db101
[INFO] running `"docker" "start" "-a" "02c7212a73852e8fc3ca26f1054704e7e39c98ea39ddf4ba492939e9e50db101"`
[INFO] [stderr]    Compiling aristeia v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/operations.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |     for (_, mut agent) in agents {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "02c7212a73852e8fc3ca26f1054704e7e39c98ea39ddf4ba492939e9e50db101"`
[INFO] running `"docker" "rm" "-f" "02c7212a73852e8fc3ca26f1054704e7e39c98ea39ddf4ba492939e9e50db101"`
[INFO] [stdout] 02c7212a73852e8fc3ca26f1054704e7e39c98ea39ddf4ba492939e9e50db101
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/aristeia/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0f16f016a71ff1ae07b7028f4f49489156624e1871816c797b0f15045db53ec4
[INFO] running `"docker" "start" "-a" "0f16f016a71ff1ae07b7028f4f49489156624e1871816c797b0f15045db53ec4"`
[INFO] [stderr]    Compiling aristeia v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/operations.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |     for (_, mut agent) in agents {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 7.57s
[INFO] running `"docker" "inspect" "0f16f016a71ff1ae07b7028f4f49489156624e1871816c797b0f15045db53ec4"`
[INFO] running `"docker" "rm" "-f" "0f16f016a71ff1ae07b7028f4f49489156624e1871816c797b0f15045db53ec4"`
[INFO] [stdout] 0f16f016a71ff1ae07b7028f4f49489156624e1871816c797b0f15045db53ec4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/aristeia/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] f9cdcd14ddf233711e3617b429662bba4acff258f2c7f9613c1642ddd59e4448
[INFO] running `"docker" "start" "-a" "f9cdcd14ddf233711e3617b429662bba4acff258f2c7f9613c1642ddd59e4448"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aristeia-1281f6a2c3ff9315
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test agent::tests::crossover_parents ... ok
[INFO] [stdout] test agent::tests::new_no_genes ... ok
[INFO] [stdout] test operations::tests::rate_to_number_full_proportion ... ok
[INFO] [stdout] test operations::tests::rate_to_number_minimum_preference_greater_than_proportion ... ok
[INFO] [stdout] test operations::tests::rate_to_number_minimum_preference_greater_than_population ... ok
[INFO] [stdout] test evolution::tests::run_iterations_nothing_to_do ... ok
[INFO] [stdout] test operations::tests::rate_to_number_minimum_preference_less_than_proportion ... ok
[INFO] [stdout] test agent::tests::new_with_genes ... ok
[INFO] [stdout] test operations::tests::rate_to_number_standard_proportion ... ok
[INFO] [stdout] test operations::tests::rate_to_number_population_is_zero ... ok
[INFO] [stdout] test operations::tests::rate_to_number_rounds_down ... ok
[INFO] [stdout] test population::tests::cull_all_below ... ok
[INFO] [stdout] test operations::tests::selection_lowest_score_returns_lowest ... ok
[INFO] [stdout] test agent::tests::mutate ... ok
[INFO] [stdout] test agent::tests::crossover_some_genes_longer_other ... ok
[INFO] [stdout] test agent::tests::crossover_some_genes_same_length_other ... ok
[INFO] [stdout] test agent::tests::crossover_some_genes_shorter_other ... ok
[INFO] [stdout] test operations::tests::selection_highest_score_returns_highest ... ok
[INFO] [stdout] test operations::tests::selection_random_any_returns_correct_proportion ... ok
[INFO] [stdout] test population::tests::new_empty ... ok
[INFO] [stdout] test population::tests::new_with_false_unique ... ok
[INFO] [stdout] test population::tests::new_with_true_unique ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests aristeia
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f9cdcd14ddf233711e3617b429662bba4acff258f2c7f9613c1642ddd59e4448"`
[INFO] running `"docker" "rm" "-f" "f9cdcd14ddf233711e3617b429662bba4acff258f2c7f9613c1642ddd59e4448"`
[INFO] [stdout] f9cdcd14ddf233711e3617b429662bba4acff258f2c7f9613c1642ddd59e4448