[INFO] updating cached repository https://github.com/Ueberflieger/backpropagation
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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] fe73214c315b49a58e409a8e5924165aafd9dfde
[INFO] checking Ueberflieger/backpropagation against try#00e4530a79c42b21a6ca2ac1edb597c90d21f89f for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FUeberflieger%2Fbackpropagation" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ueberflieger/backpropagation on toolchain 00e4530a79c42b21a6ca2ac1edb597c90d21f89f
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Ueberflieger/backpropagation
[INFO] finished tweaking git repo https://github.com/Ueberflieger/backpropagation
[INFO] tweaked toml for git repo https://github.com/Ueberflieger/backpropagation written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Ueberflieger/backpropagation already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/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=forbid" "-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" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 70bd176d4d5de174b232750b6af13c06f66f0d16f343daa4b078d9cd8e090476
[INFO] running `"docker" "start" "-a" "70bd176d4d5de174b232750b6af13c06f66f0d16f343daa4b078d9cd8e090476"`
[INFO] [stderr]     Checking backpropagation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `calculate_output`
[INFO] [stderr]  --> src/neuron.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn calculate_output(&self, input: f64) -> f64 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `calculate_output`
[INFO] [stderr]  --> src/neuron.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn calculate_output(&self, input: f64) -> f64 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "70bd176d4d5de174b232750b6af13c06f66f0d16f343daa4b078d9cd8e090476"`
[INFO] running `"docker" "rm" "-f" "70bd176d4d5de174b232750b6af13c06f66f0d16f343daa4b078d9cd8e090476"`
[INFO] [stdout] 70bd176d4d5de174b232750b6af13c06f66f0d16f343daa4b078d9cd8e090476