[INFO] updating cached repository ToruNiina/rust-ising
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ToruNiina/rust-ising
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ToruNiina/rust-ising" "work/ex/beta-1.38-1/sources/1.37.0/gh/ToruNiina/rust-ising"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ToruNiina/rust-ising'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ToruNiina/rust-ising" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ToruNiina/rust-ising"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ToruNiina/rust-ising'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 020ead5384428acb2fd45a2bc0fea7ec6baa59f8
[INFO] sha for GitHub repo ToruNiina/rust-ising: 020ead5384428acb2fd45a2bc0fea7ec6baa59f8
[INFO] validating manifest of ToruNiina/rust-ising 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 ToruNiina/rust-ising 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 ToruNiina/rust-ising
[INFO] finished frobbing ToruNiina/rust-ising
[INFO] frobbed toml for ToruNiina/rust-ising written to work/ex/beta-1.38-1/sources/1.37.0/gh/ToruNiina/rust-ising/Cargo.toml
[INFO] started frobbing ToruNiina/rust-ising
[INFO] finished frobbing ToruNiina/rust-ising
[INFO] frobbed toml for ToruNiina/rust-ising written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ToruNiina/rust-ising/Cargo.toml
[INFO] crate ToruNiina/rust-ising 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] testing ToruNiina/rust-ising 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-0/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/ToruNiina/rust-ising:/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] 3041e441ac1b493f77b370788bc18ab1df04b88e884bb4b6fdf12968f8ba72ff
[INFO] running `"docker" "start" "-a" "3041e441ac1b493f77b370788bc18ab1df04b88e884bb4b6fdf12968f8ba72ff"`
[INFO] [stderr]    Compiling libc v0.2.30
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]    Compiling ising v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]    --> src/main.rs:147:63
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn step<R: Rng>(field: &mut Field, hamiltonian: &Hamiltonian, rng: &mut R) {
[INFO] [stderr]     |                                                               ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.18s
[INFO] running `"docker" "inspect" "3041e441ac1b493f77b370788bc18ab1df04b88e884bb4b6fdf12968f8ba72ff"`
[INFO] running `"docker" "rm" "-f" "3041e441ac1b493f77b370788bc18ab1df04b88e884bb4b6fdf12968f8ba72ff"`
[INFO] [stdout] 3041e441ac1b493f77b370788bc18ab1df04b88e884bb4b6fdf12968f8ba72ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/ToruNiina/rust-ising:/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] da38323fb156e65a51f92a489a2ffa1fb32dd7c4961ef9071ee49f36adfd8db6
[INFO] running `"docker" "start" "-a" "da38323fb156e65a51f92a489a2ffa1fb32dd7c4961ef9071ee49f36adfd8db6"`
[INFO] [stderr]    Compiling ising v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]    --> src/main.rs:147:63
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn step<R: Rng>(field: &mut Field, hamiltonian: &Hamiltonian, rng: &mut R) {
[INFO] [stderr]     |                                                               ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "da38323fb156e65a51f92a489a2ffa1fb32dd7c4961ef9071ee49f36adfd8db6"`
[INFO] running `"docker" "rm" "-f" "da38323fb156e65a51f92a489a2ffa1fb32dd7c4961ef9071ee49f36adfd8db6"`
[INFO] [stdout] da38323fb156e65a51f92a489a2ffa1fb32dd7c4961ef9071ee49f36adfd8db6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/ToruNiina/rust-ising:/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] 1c839da482b9898cbdc0c89b288fb09b97cfcba5ada104b7af44eb077bae8061
[INFO] running `"docker" "start" "-a" "1c839da482b9898cbdc0c89b288fb09b97cfcba5ada104b7af44eb077bae8061"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ising-fd2d179765cfaf63
[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" "1c839da482b9898cbdc0c89b288fb09b97cfcba5ada104b7af44eb077bae8061"`
[INFO] running `"docker" "rm" "-f" "1c839da482b9898cbdc0c89b288fb09b97cfcba5ada104b7af44eb077bae8061"`
[INFO] [stdout] 1c839da482b9898cbdc0c89b288fb09b97cfcba5ada104b7af44eb077bae8061