[INFO] updating cached repository tylerreisinger/neural-network-deep-learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tylerreisinger/neural-network-deep-learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tylerreisinger/neural-network-deep-learning" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/tylerreisinger/neural-network-deep-learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/tylerreisinger/neural-network-deep-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tylerreisinger/neural-network-deep-learning" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/tylerreisinger/neural-network-deep-learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/tylerreisinger/neural-network-deep-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e9b993dc16ba212952631e2fa08a1b63ac1c99fb
[INFO] sha for GitHub repo tylerreisinger/neural-network-deep-learning: e9b993dc16ba212952631e2fa08a1b63ac1c99fb
[INFO] validating manifest of tylerreisinger/neural-network-deep-learning on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tylerreisinger/neural-network-deep-learning on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tylerreisinger/neural-network-deep-learning
[INFO] finished frobbing tylerreisinger/neural-network-deep-learning
[INFO] frobbed toml for tylerreisinger/neural-network-deep-learning written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/tylerreisinger/neural-network-deep-learning/Cargo.toml
[INFO] started frobbing tylerreisinger/neural-network-deep-learning
[INFO] finished frobbing tylerreisinger/neural-network-deep-learning
[INFO] frobbed toml for tylerreisinger/neural-network-deep-learning written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/tylerreisinger/neural-network-deep-learning/Cargo.toml
[INFO] crate tylerreisinger/neural-network-deep-learning already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] checking tylerreisinger/neural-network-deep-learning against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-6/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/tylerreisinger/neural-network-deep-learning:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 91fbe027de1a85c851a9028432424b9f47a6c1599f9a6dffbf8b9a85da44e81a
[INFO] running `"docker" "start" "-a" "91fbe027de1a85c851a9028432424b9f47a6c1599f9a6dffbf8b9a85da44e81a"`
[INFO] [stderr]     Checking neural_net v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/mnist/idx.rs:402:9
[INFO] [stderr]     |
[INFO] [stderr] 402 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `labels`
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let labels = 
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_labels`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `images`
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let images = 
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_images`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `labels`
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let labels = 
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_labels`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `images`
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let images = 
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_images`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "91fbe027de1a85c851a9028432424b9f47a6c1599f9a6dffbf8b9a85da44e81a"`
[INFO] running `"docker" "rm" "-f" "91fbe027de1a85c851a9028432424b9f47a6c1599f9a6dffbf8b9a85da44e81a"`
[INFO] [stdout] 91fbe027de1a85c851a9028432424b9f47a6c1599f9a6dffbf8b9a85da44e81a