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[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/f4try/tutorials_rust_cfd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ff4try%2Ftutorials_rust_cfd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ff4try%2Ftutorials_rust_cfd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e1e1f75142d039726620f40f8d20b22c8e2ad0e
[INFO] building f4try/tutorials_rust_cfd against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ff4try%2Ftutorials_rust_cfd" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/f4try/tutorials_rust_cfd on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/f4try/tutorials_rust_cfd
[INFO] finished tweaking git repo https://github.com/f4try/tutorials_rust_cfd
[INFO] tweaked toml for git repo https://github.com/f4try/tutorials_rust_cfd written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/f4try/tutorials_rust_cfd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5cf096648960c043877f7b5d068aaeb5b58647def07ec3f1a54928e55c3a485c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cf096648960c043877f7b5d068aaeb5b58647def07ec3f1a54928e55c3a485c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cf096648960c043877f7b5d068aaeb5b58647def07ec3f1a54928e55c3a485c", kill_on_drop: false }`
[INFO] [stdout] 5cf096648960c043877f7b5d068aaeb5b58647def07ec3f1a54928e55c3a485c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e801746cb80c57158babe00fef64fbb4447c633f5214fb40c2dcad9c7a1ea7aa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e801746cb80c57158babe00fef64fbb4447c633f5214fb40c2dcad9c7a1ea7aa", kill_on_drop: false }`
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[INFO] [stderr]    Compiling cc v1.0.65
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[INFO] [stderr]    Compiling ndarray v0.13.1
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[INFO] [stderr]    Compiling cfd_tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.47s
[INFO] running `Command { std: "docker" "inspect" "e801746cb80c57158babe00fef64fbb4447c633f5214fb40c2dcad9c7a1ea7aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e801746cb80c57158babe00fef64fbb4447c633f5214fb40c2dcad9c7a1ea7aa", kill_on_drop: false }`
[INFO] [stdout] e801746cb80c57158babe00fef64fbb4447c633f5214fb40c2dcad9c7a1ea7aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26499b89233f2e6969dac23f3b4827a8a99d7ae6d09728a34ec7e746b7b44d91
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "26499b89233f2e6969dac23f3b4827a8a99d7ae6d09728a34ec7e746b7b44d91", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfd_tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> examples/tut12_2D_laplace.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let c = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `tut12_2D_laplace` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `tut12_2_d_laplace`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plot2D` should have a snake case name
[INFO] [stdout]  --> examples/tut12_2D_laplace.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn plot2D(p:&Array2<f64>,nx:usize,ny:usize,x:f64,y:f64){
[INFO] [stdout]   |    ^^^^^^ help: convert the identifier to snake case: `plot2_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> examples/tut01_1D_convection.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::{Duration, SystemTime};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> examples/tut06_array_operations.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::{Duration, SystemTime};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> examples/tut12_2D_laplace.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fg.show();
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> examples/tut02_1D_nonlinear_convection.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let c = 1.;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut02_1D_nonlinear_convection.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut01_1D_convection.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/tut02_1D_nonlinear_convection.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut uh = u.slice_mut(s![(0.5/dx) as usize..(1./dx +1.) as usize]);
[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: variable does not need to be mutable
[INFO] [stdout]   --> examples/tut01_1D_convection.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut uh = u.slice_mut(s![(0.5/dx) as usize..(1./dx +1.) as usize]);
[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 import: `Duration`
[INFO] [stdout]  --> examples/tut15_navier_stokes_channel.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::{Duration, SystemTime};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `tut01_1D_convection` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `tut01_1_d_convection`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `tut02_1D_nonlinear_convection` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `tut02_1_d_nonlinear_convection`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `criterion_plot`
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use criterion_plot::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^ use of undeclared crate or module `criterion_plot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> examples/tut00_quick_intro.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     for i in 0..5{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> examples/tut06_array_operations.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let x = Array1::linspace(0.,2.,nx);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> examples/tut06_array_operations.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let y = Array1::linspace(0.,2.,ny);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `un` is never read
[INFO] [stdout]   --> examples/tut06_array_operations.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut un = Array2::<f64>::ones((ny,nx));
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut06_array_operations.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     for n in 0..nt+1{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]   --> examples/tut06_array_operations.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let now = SystemTime::now();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `un` is never read
[INFO] [stdout]   --> examples/tut06_array_operations.rs:74:13
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut un = Array2::<f64>::ones((ny,nx));
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut06_array_operations.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     for n in 1..nt+1{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut04_diffusion.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pn` is never read
[INFO] [stdout]   --> examples/tut13_poisson.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut pn = p.clone();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pd`
[INFO] [stdout]   --> examples/tut13_poisson.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let pd=p.clone();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_pd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tut04_diffusion.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fg.show();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tut06_array_operations.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fg.show();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pn` is never read
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut pn = Array2::<f64>::zeros((row,col));
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `q`
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     for q in 0..nit{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_q`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nt`
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let nt = 10;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_nt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let c = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `un` is never read
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let mut un = Array2::<f64>::zeros((ny,nx));
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `vn` is never read
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let mut vn = Array2::<f64>::zeros((ny,nx));
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pn`
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut pn = Array2::<f64>::zeros((ny,nx));
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `b` is assigned to, but never used
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let mut b = Array2::<f64>::zeros((ny,nx));
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_b` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]    --> examples/tut15_navier_stokes_channel.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         b = build_up_b(rho, dt, dx, dy, &u, &v);
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plot2D` should have a snake case name
[INFO] [stdout]  --> examples/tut13_poisson.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn plot2D(p:&Array2<f64>,nx:usize,ny:usize,x:f64,y:f64){
[INFO] [stdout]   |    ^^^^^^ help: convert the identifier to snake case: `plot2_d`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `itertools_num`
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use itertools_num::linspace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ use of undeclared crate or module `itertools_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut pn = Array2::<f64>::zeros((ny,nx));
[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 `Result` that must be used
[INFO] [stdout]  --> examples/tut13_poisson.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fg.show();
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]   --> examples/tut15_navier_stokes_channel.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let F = 1.;
[INFO] [stdout]    |         ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/tut15_navier_stokes_channel.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/tut15_navier_stokes_channel.rs:174:5
[INFO] [stdout]     |
[INFO] [stdout] 174 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/tut15_navier_stokes_channel.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sigma`
[INFO] [stdout]   --> examples/tut05_burgers.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let sigma = 0.5;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_sigma`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> examples/tut05_burgers.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let t = 0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut05_burgers.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Boxed`
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 |             k.set(Boxed::Yes)
[INFO] [stdout]   |                   ^^^^^ use of undeclared type `Boxed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Position`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 |             .set(Position::Inside(Vertical::Top, Horizontal::Left))
[INFO] [stdout]    |                  ^^^^^^^^ use of undeclared type `Position`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/tut05_burgers.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fg.show();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Vertical`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 |             .set(Position::Inside(Vertical::Top, Horizontal::Left))
[INFO] [stdout]    |                                   ^^^^^^^^ use of undeclared type `Vertical`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Horizontal`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:10:50
[INFO] [stdout]    |
[INFO] [stdout] 10 |             .set(Position::Inside(Vertical::Top, Horizontal::Left))
[INFO] [stdout]    |                                                  ^^^^^^^^^^ use of undeclared type `Horizontal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Color`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:17:24
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 lp.set(Color::DarkViolet)
[INFO] [stdout]    |                        ^^^^^ use of undeclared type `Color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut03_convergence_cfl.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut03_convergence_cfl.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     for n in 1..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LineType`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:19:26
[INFO] [stdout]    |
[INFO] [stdout] 19 |                     .set(LineType::Dash)
[INFO] [stdout]    |                          ^^^^^^^^ use of undeclared type `LineType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `PointType`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:21:26
[INFO] [stdout]    |
[INFO] [stdout] 21 |                     .set(PointType::Circle)
[INFO] [stdout]    |                          ^^^^^^^^^ use of undeclared type `PointType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pn` is never read
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut pn = p.clone();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for n in 1..nit{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `un` is never read
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let mut un = u.clone();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `vn` is never read
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut vn = v.clone();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     for n in 0..nt{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> examples/tut14_navier_stokes_cavity.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let c = 1.;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> examples/tut14_navier_stokes_cavity.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let mut b = Array2::<f64>::zeros((ny,nx));
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Child` in this scope
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main()->Result<Child,Box<(dyn std::error::Error + 'static)>>{
[INFO] [stdout]   |                   ^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::process::Child;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Figure`
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Figure::new()
[INFO] [stdout]   |     ^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 1 | use gnuplot::Figure;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `Key` in this scope
[INFO] [stdout]  --> examples/tut_criterion_plot.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |         .configure(Key, |k| {
[INFO] [stdout]   |                    ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `LinesPoints` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |         .plot(LinesPoints {
[INFO] [stdout]    |               ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Label` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |                     .set(Label("sin(x)"))
[INFO] [stdout]    |                          ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `PointSize` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:20:26
[INFO] [stdout]    |
[INFO] [stdout] 20 |                     .set(PointSize(1.5))
[INFO] [stdout]    |                          ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this tuple variant
[INFO] [stdout]    |
[INFO] [stdout] 1  | use gnuplot::PointSize;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Steps` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |         .plot(Steps {
[INFO] [stdout]    |               ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Color`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:28:23
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 s.set(Color::Rgb(0, 158, 115))
[INFO] [stdout]    |                       ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this trait
[INFO] [stdout]    |
[INFO] [stdout] 1  | use plotters::prelude::Color;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Label` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:29:22
[INFO] [stdout]    |
[INFO] [stdout] 29 |                 .set(Label("atan(x)"))
[INFO] [stdout]    |                      ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `LineWidth` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 |                 .set(LineWidth(2.))
[INFO] [stdout]    |                      ^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this tuple variant
[INFO] [stdout]    |
[INFO] [stdout] 1  | use gnuplot::LineWidth;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Impulses` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:32:15
[INFO] [stdout]    |
[INFO] [stdout] 32 |         .plot(Impulses {
[INFO] [stdout]    |               ^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Color`
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 |                 i.set(Color::Rgb(86, 180, 233))
[INFO] [stdout]    |                       ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this trait
[INFO] [stdout]    |
[INFO] [stdout] 1  | use plotters::prelude::Color;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Label` in this scope
[INFO] [stdout]   --> examples/tut_criterion_plot.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 .set(Label("cos(atan(x))"))
[INFO] [stdout]    |                      ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/tut03_convergence_cfl.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut uh = u.slice_mut(s![(0.5/dx) as usize..(1./dx +1.) as usize]);
[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: variable does not need to be mutable
[INFO] [stdout]   --> examples/tut03_convergence_cfl.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut uh = u.slice_mut(s![(0.5/dx) as usize..(1./dx +1.) as usize]);
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 22 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0422, E0425, E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cfd_tut`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/tut14_navier_stokes_cavity.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let mut b = Array2::<f64>::zeros((ny,nx));
[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 `Result` that must be used
[INFO] [stdout]    --> examples/tut14_navier_stokes_cavity.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/tut14_navier_stokes_cavity.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> examples/tut14_navier_stokes_cavity.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fg.show();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "26499b89233f2e6969dac23f3b4827a8a99d7ae6d09728a34ec7e746b7b44d91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26499b89233f2e6969dac23f3b4827a8a99d7ae6d09728a34ec7e746b7b44d91", kill_on_drop: false }`
[INFO] [stdout] 26499b89233f2e6969dac23f3b4827a8a99d7ae6d09728a34ec7e746b7b44d91
