[INFO] updating cached repository https://github.com/PNZeml/rust_playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 68a4525fc9b0c79f4fdf75ad5554bd677933a9c3
[INFO] testing PNZeml/rust_playground against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FPNZeml%2Frust_playground" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PNZeml/rust_playground on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/PNZeml/rust_playground
[INFO] finished tweaking git repo https://github.com/PNZeml/rust_playground
[INFO] tweaked toml for git repo https://github.com/PNZeml/rust_playground written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/PNZeml/rust_playground already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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-2019-09-28" "build" "--frozen"`
[INFO] [stdout] a2e97a8c82f217f16a28d5d5db44b817cee1fde59e9a1d64d9b8a38f96106548
[INFO] running `"docker" "start" "-a" "a2e97a8c82f217f16a28d5d5db44b817cee1fde59e9a1d64d9b8a38f96106548"`
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.20.1
[INFO] [stderr]    Compiling simple_hebbian_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:91:21
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let mut n = rng.gen_range(0, DATA_SETS);
[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: method is never used: `new`
[INFO] [stderr]   --> src/model/input.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(name: &str, signals: &[i128], class: ImageClass) -> Option<Input> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]   --> src/model/weight.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn print(self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `One`
[INFO] [stderr]  --> src/model/image_class.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     One,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Two`
[INFO] [stderr]  --> src/model/image_class.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Two,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Three`
[INFO] [stderr]  --> src/model/image_class.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Three,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         create_directory(&new_folder_path);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |             weights[i].to_file(&path_to_weight);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.94s
[INFO] running `"docker" "inspect" "a2e97a8c82f217f16a28d5d5db44b817cee1fde59e9a1d64d9b8a38f96106548"`
[INFO] running `"docker" "rm" "-f" "a2e97a8c82f217f16a28d5d5db44b817cee1fde59e9a1d64d9b8a38f96106548"`
[INFO] [stdout] a2e97a8c82f217f16a28d5d5db44b817cee1fde59e9a1d64d9b8a38f96106548
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7cb401f9f782ccf0fe6cb812bbf98f1b62b19f91f86fc94461645b329c727c21
[INFO] running `"docker" "start" "-a" "7cb401f9f782ccf0fe6cb812bbf98f1b62b19f91f86fc94461645b329c727c21"`
[INFO] [stderr]    Compiling simple_hebbian_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:91:21
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let mut n = rng.gen_range(0, DATA_SETS);
[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: method is never used: `new`
[INFO] [stderr]   --> src/model/input.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(name: &str, signals: &[i128], class: ImageClass) -> Option<Input> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]   --> src/model/weight.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn print(self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `One`
[INFO] [stderr]  --> src/model/image_class.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     One,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Two`
[INFO] [stderr]  --> src/model/image_class.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Two,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Three`
[INFO] [stderr]  --> src/model/image_class.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Three,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         create_directory(&new_folder_path);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |             weights[i].to_file(&path_to_weight);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `"docker" "inspect" "7cb401f9f782ccf0fe6cb812bbf98f1b62b19f91f86fc94461645b329c727c21"`
[INFO] running `"docker" "rm" "-f" "7cb401f9f782ccf0fe6cb812bbf98f1b62b19f91f86fc94461645b329c727c21"`
[INFO] [stdout] 7cb401f9f782ccf0fe6cb812bbf98f1b62b19f91f86fc94461645b329c727c21
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 55560de6f5cfb66f59c7441a4ec0be61015ef37eb1a87dea289f25c685da47cb
[INFO] running `"docker" "start" "-a" "55560de6f5cfb66f59c7441a4ec0be61015ef37eb1a87dea289f25c685da47cb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/simple_hebbian_rs-10dfcc3b03d2ec78
[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" "55560de6f5cfb66f59c7441a4ec0be61015ef37eb1a87dea289f25c685da47cb"`
[INFO] running `"docker" "rm" "-f" "55560de6f5cfb66f59c7441a4ec0be61015ef37eb1a87dea289f25c685da47cb"`
[INFO] [stdout] 55560de6f5cfb66f59c7441a4ec0be61015ef37eb1a87dea289f25c685da47cb