Dec 12 09:45:35.138 INFO checking prophet-0.4.2 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 09:45:35.138 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 09:45:35.585 INFO [stdout] bc53553dcf54372aecbb40e9ae65a67d749b4ab84842620dac67b002e26daca9
Dec 12 09:45:35.590 INFO running `"docker" "start" "-a" "bc53553dcf54372aecbb40e9ae65a67d749b4ab84842620dac67b002e26daca9"`
Dec 12 09:45:37.787 INFO [stderr] usermod: no changes
Dec 12 09:45:37.950 INFO [stderr]    Compiling ndarray v0.10.14
Dec 12 09:45:46.520 INFO [stderr]     Checking ndarray-rand v0.6.1
Dec 12 09:45:47.845 INFO [stderr]     Checking prophet v0.4.2 (/source)
Dec 12 09:45:52.784 INFO [stderr] warning: unused return value of `std::borrow::ToOwned::to_owned` that must be used
Dec 12 09:45:52.784 INFO [stderr]    --> src/neural_net.rs:418:4
Dec 12 09:45:52.784 INFO [stderr]     |
Dec 12 09:45:52.784 INFO [stderr] 418 |             layer.calculate_output_gradients(expected.view()).to_owned();
Dec 12 09:45:52.784 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 09:45:52.784 INFO [stderr]     |
Dec 12 09:45:52.784 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 09:45:52.784 INFO [stderr]     = note: cloning is often expensive and is not expected to have side effects
Dec 12 09:45:52.784 INFO [stderr] 
Dec 12 09:45:55.312 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.49s
Dec 12 09:45:55.318 INFO [stderr] su: No module specific data is present
Dec 12 09:45:56.420 INFO running `"docker" "inspect" "bc53553dcf54372aecbb40e9ae65a67d749b4ab84842620dac67b002e26daca9"`
Dec 12 09:45:56.814 INFO running `"docker" "rm" "-f" "bc53553dcf54372aecbb40e9ae65a67d749b4ab84842620dac67b002e26daca9"`
Dec 12 09:45:57.184 INFO [stdout] bc53553dcf54372aecbb40e9ae65a67d749b4ab84842620dac67b002e26daca9