[INFO] crate prophet 0.4.2 is already in cache
[INFO] extracting crate prophet 0.4.2 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/prophet/0.4.2
[INFO] extracting crate prophet 0.4.2 into work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/prophet/0.4.2
[INFO] validating manifest of prophet-0.4.2 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of prophet-0.4.2 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing prophet-0.4.2
[INFO] finished frobbing prophet-0.4.2
[INFO] frobbed toml for prophet-0.4.2 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/prophet/0.4.2/Cargo.toml
[INFO] started frobbing prophet-0.4.2
[INFO] finished frobbing prophet-0.4.2
[INFO] frobbed toml for prophet-0.4.2 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/prophet/0.4.2/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking prophet-0.4.2 against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-0/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/prophet/0.4.2:/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 659a428ee0b84d8d8ff86ec49c3da2d1d878e63982b5b21f7839da423221a4ac
[INFO] running `"docker" "start" "-a" "659a428ee0b84d8d8ff86ec49c3da2d1d878e63982b5b21f7839da423221a4ac"`
[INFO] [stderr]    Compiling ndarray v0.10.14
[INFO] [stderr]     Checking ndarray-rand v0.6.1
[INFO] [stderr]     Checking prophet v0.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::borrow::ToOwned::to_owned` that must be used
[INFO] [stderr]    --> src/neural_net.rs:418:4
[INFO] [stderr]     |
[INFO] [stderr] 418 |             layer.calculate_output_gradients(expected.view()).to_owned();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: cloning is often expensive and is not expected to have side effects
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.19s
[INFO] running `"docker" "inspect" "659a428ee0b84d8d8ff86ec49c3da2d1d878e63982b5b21f7839da423221a4ac"`
[INFO] running `"docker" "rm" "-f" "659a428ee0b84d8d8ff86ec49c3da2d1d878e63982b5b21f7839da423221a4ac"`
[INFO] [stdout] 659a428ee0b84d8d8ff86ec49c3da2d1d878e63982b5b21f7839da423221a4ac