[INFO] updating cached repository saulshanabrook/graph-computation-play
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/saulshanabrook/graph-computation-play
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/saulshanabrook/graph-computation-play" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/saulshanabrook/graph-computation-play"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/saulshanabrook/graph-computation-play'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/saulshanabrook/graph-computation-play" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/saulshanabrook/graph-computation-play"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/saulshanabrook/graph-computation-play'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6a782a5be49bfaa372b226ceb59a68e26b6ea61
[INFO] sha for GitHub repo saulshanabrook/graph-computation-play: b6a782a5be49bfaa372b226ceb59a68e26b6ea61
[INFO] validating manifest of saulshanabrook/graph-computation-play on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of saulshanabrook/graph-computation-play on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing saulshanabrook/graph-computation-play
[INFO] finished frobbing saulshanabrook/graph-computation-play
[INFO] frobbed toml for saulshanabrook/graph-computation-play written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/saulshanabrook/graph-computation-play/Cargo.toml
[INFO] started frobbing saulshanabrook/graph-computation-play
[INFO] finished frobbing saulshanabrook/graph-computation-play
[INFO] frobbed toml for saulshanabrook/graph-computation-play written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/saulshanabrook/graph-computation-play/Cargo.toml
[INFO] crate saulshanabrook/graph-computation-play already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking saulshanabrook/graph-computation-play against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-7/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/saulshanabrook/graph-computation-play:/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=forbid" "-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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 31d7e3433be15ab6e26df26b60d7f22b3253e2426db3ae93194b6e28f9d94dd3
[INFO] running `"docker" "start" "-a" "31d7e3433be15ab6e26df26b60d7f22b3253e2426db3ae93194b6e28f9d94dd3"`
[INFO] [stderr]     Checking rand v0.3.17
[INFO] [stderr]     Checking graph-computation-play v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `POP_SIZE`
[INFO] [stderr]   --> main.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | const POP_SIZE: usize = 100;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Genomes`
[INFO] [stderr]   --> main.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | type Genomes = [Genome; POP_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Errors`
[INFO] [stderr]   --> main.rs:53:1
[INFO] [stderr]    |
[INFO] [stderr] 53 | type Errors = [Error; POP_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `errors_from_genomes`
[INFO] [stderr]   --> main.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn errors_from_genomes(genomes: Genomes) -> Errors {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Population`
[INFO] [stderr]   --> main.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | struct Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `population_from_genomes`
[INFO] [stderr]   --> main.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn population_from_genomes(genomes: Genomes) -> Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `initial_population`
[INFO] [stderr]   --> main.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn initial_population<R: Rng>(random_gene: &Range<Gene>, rng: &mut R) -> Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `POP_SIZE`
[INFO] [stderr]   --> main.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | const POP_SIZE: usize = 100;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Genomes`
[INFO] [stderr]   --> main.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | type Genomes = [Genome; POP_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Errors`
[INFO] [stderr]   --> main.rs:53:1
[INFO] [stderr]    |
[INFO] [stderr] 53 | type Errors = [Error; POP_SIZE];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `errors_from_genomes`
[INFO] [stderr]   --> main.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn errors_from_genomes(genomes: Genomes) -> Errors {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Population`
[INFO] [stderr]   --> main.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | struct Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `population_from_genomes`
[INFO] [stderr]   --> main.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn population_from_genomes(genomes: Genomes) -> Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `initial_population`
[INFO] [stderr]   --> main.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn initial_population<R: Rng>(random_gene: &Range<Gene>, rng: &mut R) -> Population {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `"docker" "inspect" "31d7e3433be15ab6e26df26b60d7f22b3253e2426db3ae93194b6e28f9d94dd3"`
[INFO] running `"docker" "rm" "-f" "31d7e3433be15ab6e26df26b60d7f22b3253e2426db3ae93194b6e28f9d94dd3"`
[INFO] [stdout] 31d7e3433be15ab6e26df26b60d7f22b3253e2426db3ae93194b6e28f9d94dd3