[INFO] updating cached repository Ueberflieger/backpropagation
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ueberflieger/backpropagation
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ueberflieger/backpropagation" "work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ueberflieger/backpropagation" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ueberflieger/backpropagation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ueberflieger/backpropagation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fe73214c315b49a58e409a8e5924165aafd9dfde
[INFO] sha for GitHub repo Ueberflieger/backpropagation: fe73214c315b49a58e409a8e5924165aafd9dfde
[INFO] validating manifest of Ueberflieger/backpropagation 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 Ueberflieger/backpropagation 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 Ueberflieger/backpropagation
[INFO] finished frobbing Ueberflieger/backpropagation
[INFO] frobbed toml for Ueberflieger/backpropagation written to work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation/Cargo.toml
[INFO] started frobbing Ueberflieger/backpropagation
[INFO] finished frobbing Ueberflieger/backpropagation
[INFO] frobbed toml for Ueberflieger/backpropagation written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ueberflieger/backpropagation/Cargo.toml
[INFO] crate Ueberflieger/backpropagation 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing Ueberflieger/backpropagation against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] cb43be5d84730be6b6b6979fe1c146becc1d53e7588a5d6de63176ca95895343
[INFO] running `"docker" "start" "-a" "cb43be5d84730be6b6b6979fe1c146becc1d53e7588a5d6de63176ca95895343"`
[INFO] [stderr]    Compiling backpropagation v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "cb43be5d84730be6b6b6979fe1c146becc1d53e7588a5d6de63176ca95895343"`
[INFO] running `"docker" "rm" "-f" "cb43be5d84730be6b6b6979fe1c146becc1d53e7588a5d6de63176ca95895343"`
[INFO] [stdout] cb43be5d84730be6b6b6979fe1c146becc1d53e7588a5d6de63176ca95895343
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 633b02606783d47d927860751e14a790fc9cc7a5a70caf491859046089083268
[INFO] running `"docker" "start" "-a" "633b02606783d47d927860751e14a790fc9cc7a5a70caf491859046089083268"`
[INFO] [stderr]    Compiling backpropagation v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "633b02606783d47d927860751e14a790fc9cc7a5a70caf491859046089083268"`
[INFO] running `"docker" "rm" "-f" "633b02606783d47d927860751e14a790fc9cc7a5a70caf491859046089083268"`
[INFO] [stdout] 633b02606783d47d927860751e14a790fc9cc7a5a70caf491859046089083268
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Ueberflieger/backpropagation:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 4b0362cae8c28e7655716d7e5469bb64250c25c82f278e00ff3ad0b0f5baa5c2
[INFO] running `"docker" "start" "-a" "4b0362cae8c28e7655716d7e5469bb64250c25c82f278e00ff3ad0b0f5baa5c2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/backpropagation-2d1259d17c29c466
[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" "4b0362cae8c28e7655716d7e5469bb64250c25c82f278e00ff3ad0b0f5baa5c2"`
[INFO] running `"docker" "rm" "-f" "4b0362cae8c28e7655716d7e5469bb64250c25c82f278e00ff3ad0b0f5baa5c2"`
[INFO] [stdout] 4b0362cae8c28e7655716d7e5469bb64250c25c82f278e00ff3ad0b0f5baa5c2