[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/beta-1.38-1/sources/1.37.0/gh/tylerreisinger/neural-network-deep-learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tylerreisinger/neural-network-deep-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tylerreisinger/neural-network-deep-learning" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylerreisinger/neural-network-deep-learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tylerreisinger/neural-network-deep-learning on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/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/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tylerreisinger/neural-network-deep-learning against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylerreisinger/neural-network-deep-learning:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6f82240a1dc844df547bdc27d65eba098c44cd469233f06f92d43d520ae59153
[INFO] running `"docker" "start" "-a" "6f82240a1dc844df547bdc27d65eba098c44cd469233f06f92d43d520ae59153"`
[INFO] [stderr]    Compiling neural_net v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mnist/error.rs:48:32
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "6f82240a1dc844df547bdc27d65eba098c44cd469233f06f92d43d520ae59153"`
[INFO] running `"docker" "rm" "-f" "6f82240a1dc844df547bdc27d65eba098c44cd469233f06f92d43d520ae59153"`
[INFO] [stdout] 6f82240a1dc844df547bdc27d65eba098c44cd469233f06f92d43d520ae59153
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylerreisinger/neural-network-deep-learning:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] cac4e20aeb7b7dc02a1244c9ac5c4f094009d6b2d66c5d94dab8ce0cac338afd
[INFO] running `"docker" "start" "-a" "cac4e20aeb7b7dc02a1244c9ac5c4f094009d6b2d66c5d94dab8ce0cac338afd"`
[INFO] [stderr]    Compiling 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mnist/error.rs:48:32
[INFO] [stderr]    |
[INFO] [stderr] 48 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "cac4e20aeb7b7dc02a1244c9ac5c4f094009d6b2d66c5d94dab8ce0cac338afd"`
[INFO] running `"docker" "rm" "-f" "cac4e20aeb7b7dc02a1244c9ac5c4f094009d6b2d66c5d94dab8ce0cac338afd"`
[INFO] [stdout] cac4e20aeb7b7dc02a1244c9ac5c4f094009d6b2d66c5d94dab8ce0cac338afd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylerreisinger/neural-network-deep-learning:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 4fe855892a59d0c159362d3d51eec454433e03b3ee3d9b135505c00dfb91f1e0
[INFO] running `"docker" "start" "-a" "4fe855892a59d0c159362d3d51eec454433e03b3ee3d9b135505c00dfb91f1e0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/neural_net-3348d95e7e527cf0
[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" "4fe855892a59d0c159362d3d51eec454433e03b3ee3d9b135505c00dfb91f1e0"`
[INFO] running `"docker" "rm" "-f" "4fe855892a59d0c159362d3d51eec454433e03b3ee3d9b135505c00dfb91f1e0"`
[INFO] [stdout] 4fe855892a59d0c159362d3d51eec454433e03b3ee3d9b135505c00dfb91f1e0