[INFO] fetching crate convolician 0.1.0...
[INFO] testing convolician-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate convolician 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate convolician 0.1.0
[INFO] finished tweaking crates.io crate convolician 0.1.0
[INFO] tweaked toml for crates.io crate convolician 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate convolician 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate convolician 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3172aa691c8d92fac567a7de274eeff9d13e4c7ecc6fb736811041ad295ff63f
[INFO] running `Command { std: "docker" "start" "-a" "3172aa691c8d92fac567a7de274eeff9d13e4c7ecc6fb736811041ad295ff63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3172aa691c8d92fac567a7de274eeff9d13e4c7ecc6fb736811041ad295ff63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3172aa691c8d92fac567a7de274eeff9d13e4c7ecc6fb736811041ad295ff63f", kill_on_drop: false }`
[INFO] [stdout] 3172aa691c8d92fac567a7de274eeff9d13e4c7ecc6fb736811041ad295ff63f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a30098f1f9ba2eae14c267957e7681b42efaa9a9e7d5e4c393efa49b158b727a
[INFO] running `Command { std: "docker" "start" "-a" "a30098f1f9ba2eae14c267957e7681b42efaa9a9e7d5e4c393efa49b158b727a", kill_on_drop: false }`
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[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]    Compiling rawpointer v0.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling getrandom v0.1.8
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling ndarray-rand v0.9.0
[INFO] [stderr]    Compiling convolician v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/array_implementation/random_matrix.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `centre`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `before`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `after`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_x`
[INFO] [stdout]   --> src/array_implementation/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `central_difference_x_2` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.73s
[INFO] running `Command { std: "docker" "inspect" "a30098f1f9ba2eae14c267957e7681b42efaa9a9e7d5e4c393efa49b158b727a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a30098f1f9ba2eae14c267957e7681b42efaa9a9e7d5e4c393efa49b158b727a", kill_on_drop: false }`
[INFO] [stdout] a30098f1f9ba2eae14c267957e7681b42efaa9a9e7d5e4c393efa49b158b727a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 023a7aa10ecec7ecb5d3c9dbafc005e6a43179e337d49f9688077ff3922804cf
[INFO] running `Command { std: "docker" "start" "-a" "023a7aa10ecec7ecb5d3c9dbafc005e6a43179e337d49f9688077ff3922804cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling convolician v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/array_implementation/random_matrix.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `centre`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `before`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `after`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_x`
[INFO] [stdout]   --> src/array_implementation/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `central_difference_x_2` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `centre`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `before`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `after`
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d_x`
[INFO] [stdout]   --> src/array_implementation/mod.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `central_difference_x_2` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_negative_gradients` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn test_central_difference_x_negative_gradients() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_one_column` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn test_central_difference_x_one_column() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_central_difference_x_zero_columns` is never used
[INFO] [stdout]   --> src/array_implementation/central_difference.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn test_central_difference_x_zero_columns() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "023a7aa10ecec7ecb5d3c9dbafc005e6a43179e337d49f9688077ff3922804cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "023a7aa10ecec7ecb5d3c9dbafc005e6a43179e337d49f9688077ff3922804cf", kill_on_drop: false }`
[INFO] [stdout] 023a7aa10ecec7ecb5d3c9dbafc005e6a43179e337d49f9688077ff3922804cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c9363e7542859cf979d812b30e76b94811c0c6c340629dde97278dde028cc430
[INFO] running `Command { std: "docker" "start" "-a" "c9363e7542859cf979d812b30e76b94811c0c6c340629dde97278dde028cc430", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/array_implementation/random_matrix.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `centre`
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_centre`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `before`
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let before = &m.slice(s![.., ..-2]);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_before`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `after`
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let after  = &m.slice(s![.., 2.. ]);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_after`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let mut centre = d_x.slice_mut(s![.., 1..-1]);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d_x`
[INFO] [stderr]   --> src/array_implementation/mod.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let d_x = central_difference::central_difference_x(&m);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_d_x`
[INFO] [stderr] 
[INFO] [stderr] warning: function `central_difference_x_2` is never used
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn central_difference_x_2(m: &Array2<u8>) -> Array2<i16> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_central_difference_x_negative_gradients` is never used
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn test_central_difference_x_negative_gradients() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_central_difference_x_one_column` is never used
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:87:8
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn test_central_difference_x_one_column() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_central_difference_x_zero_columns` is never used
[INFO] [stderr]   --> src/array_implementation/central_difference.rs:91:8
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn test_central_difference_x_zero_columns() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `convolician` (lib) generated 7 warnings (run `cargo fix --lib -p convolician` to apply 2 suggestions)
[INFO] [stderr] warning: `convolician` (lib test) generated 9 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/convolician-b5b387f4772b5dd4)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test array_implementation::central_difference::tests::test_central_difference_x ... ok
[INFO] [stdout] test array_implementation::random_matrix::tests::test_generate ... ok
[INFO] [stdout] test array_implementation::central_difference::tests::test_deleteme ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/convolician-c059ca9f017b11dc)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests convolician
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c9363e7542859cf979d812b30e76b94811c0c6c340629dde97278dde028cc430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9363e7542859cf979d812b30e76b94811c0c6c340629dde97278dde028cc430", kill_on_drop: false }`
[INFO] [stdout] c9363e7542859cf979d812b30e76b94811c0c6c340629dde97278dde028cc430
