[INFO] cloning repository https://github.com/Stan15/nnfs_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Stan15/nnfs_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStan15%2Fnnfs_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStan15%2Fnnfs_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c3ad21bd6906f2fe3a48f8c4499b40f79efc5ea
[INFO] checking Stan15/nnfs_rust against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStan15%2Fnnfs_rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Stan15/nnfs_rust on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Stan15/nnfs_rust
[INFO] finished tweaking git repo https://github.com/Stan15/nnfs_rust
[INFO] tweaked toml for git repo https://github.com/Stan15/nnfs_rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Stan15/nnfs_rust 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d37bcfbb6d48c68657fde205168584dd01654f29fa57d78097c1bb4f7a2e5f5d
[INFO] running `Command { std: "docker" "start" "-a" "d37bcfbb6d48c68657fde205168584dd01654f29fa57d78097c1bb4f7a2e5f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d37bcfbb6d48c68657fde205168584dd01654f29fa57d78097c1bb4f7a2e5f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d37bcfbb6d48c68657fde205168584dd01654f29fa57d78097c1bb4f7a2e5f5d", kill_on_drop: false }`
[INFO] [stdout] d37bcfbb6d48c68657fde205168584dd01654f29fa57d78097c1bb4f7a2e5f5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb897704e83f5e3751732673f979417314a566d31fbebca8a9570939cce5e04e
[INFO] running `Command { std: "docker" "start" "-a" "cb897704e83f5e3751732673f979417314a566d31fbebca8a9570939cce5e04e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.5
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking ndarray-rand v0.14.0
[INFO] [stderr]     Checking nnfs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0271]: type mismatch resolving `<(i32, i32) as ShapeBuilder>::Dim == Dim<[usize; 2]>`
[INFO] [stdout]   --> src/main.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |             weights: 0.10 * Array2::random((n_inputs, n_neurons), Uniform::new(0., 10.)),
[INFO] [stdout]    |                             -------------- ^^^^^^^^^^^^^^^^^^^^^ expected `Dim<[usize; 2]>`, found `(i32, i32)`
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Dim<[usize; 2]>`
[INFO] [stdout]                found tuple `(i32, i32)`
[INFO] [stdout] note: required by a bound in `ndarray_rand::RandomExt::random`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-rand-0.14.0/src/lib.rs:91:26
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn random<Sh, IdS>(shape: Sh, distribution: IdS) -> ArrayBase<S, D>
[INFO] [stdout]    |        ------ required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 91 |         Sh: ShapeBuilder<Dim = D>;
[INFO] [stdout]    |                          ^^^^^^^ required by this bound in `RandomExt::random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `(i32, i32): ndarray::Dimension` is not satisfied
[INFO] [stdout]   --> src/main.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |             weights: 0.10 * Array2::random((n_inputs, n_neurons), Uniform::new(0., 10.)),
[INFO] [stdout]    |                             -------------- ^^^^^^^^^^^^^^^^^^^^^ the trait `ndarray::Dimension` is not implemented for `(i32, i32)`
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following other types implement trait `ndarray::Dimension`:
[INFO] [stdout]              Dim<IxDynImpl>
[INFO] [stdout]              Dim<[usize; 0]>
[INFO] [stdout]              Dim<[usize; 1]>
[INFO] [stdout]              Dim<[usize; 2]>
[INFO] [stdout]              Dim<[usize; 3]>
[INFO] [stdout]              Dim<[usize; 4]>
[INFO] [stdout]              Dim<[usize; 5]>
[INFO] [stdout]              Dim<[usize; 6]>
[INFO] [stdout]    = note: required for `(i32, i32)` to implement `IntoDimension`
[INFO] [stdout]    = note: required for `(i32, i32)` to implement `ShapeBuilder`
[INFO] [stdout] note: required by a bound in `ndarray_rand::RandomExt::random`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-rand-0.14.0/src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn random<Sh, IdS>(shape: Sh, distribution: IdS) -> ArrayBase<S, D>
[INFO] [stdout]    |        ------ required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 91 |         Sh: ShapeBuilder<Dim = D>;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^ required by this bound in `RandomExt::random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<({integer}, i32) as ShapeBuilder>::Dim == Dim<[usize; 2]>`
[INFO] [stdout]    --> src/main.rs:14:35
[INFO] [stdout]     |
[INFO] [stdout] 14  |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]     |                     ------------- ^^^^^^^^^^^^^^ expected `Dim<[usize; 2]>`, found `({integer}, i32)`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Dim<[usize; 2]>`
[INFO] [stdout]                 found tuple `({integer}, i32)`
[INFO] [stdout] note: required by a bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-0.15.6/src/impl_constructors.rs:343:26
[INFO] [stdout]     |
[INFO] [stdout] 340 |     pub fn zeros<Sh>(shape: Sh) -> Self
[INFO] [stdout]     |            ----- required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 343 |         Sh: ShapeBuilder<Dim = D>,
[INFO] [stdout]     |                          ^^^^^^^ required by this bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `({integer}, i32): ndarray::Dimension` is not satisfied
[INFO] [stdout]    --> src/main.rs:14:35
[INFO] [stdout]     |
[INFO] [stdout] 14  |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]     |                     ------------- ^^^^^^^^^^^^^^ the trait `ndarray::Dimension` is not implemented for `({integer}, i32)`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `ndarray::Dimension`:
[INFO] [stdout]               Dim<IxDynImpl>
[INFO] [stdout]               Dim<[usize; 0]>
[INFO] [stdout]               Dim<[usize; 1]>
[INFO] [stdout]               Dim<[usize; 2]>
[INFO] [stdout]               Dim<[usize; 3]>
[INFO] [stdout]               Dim<[usize; 4]>
[INFO] [stdout]               Dim<[usize; 5]>
[INFO] [stdout]               Dim<[usize; 6]>
[INFO] [stdout]     = note: required for `({integer}, i32)` to implement `IntoDimension`
[INFO] [stdout]     = note: required for `({integer}, i32)` to implement `ShapeBuilder`
[INFO] [stdout] note: required by a bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-0.15.6/src/impl_constructors.rs:343:13
[INFO] [stdout]     |
[INFO] [stdout] 340 |     pub fn zeros<Sh>(shape: Sh) -> Self
[INFO] [stdout]     |            ----- required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 343 |         Sh: ShapeBuilder<Dim = D>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<(i32, i32) as ShapeBuilder>::Dim == Dim<[usize; 2]>`
[INFO] [stdout]   --> src/main.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |             weights: 0.10 * Array2::random((n_inputs, n_neurons), Uniform::new(0., 10.)),
[INFO] [stdout]    |                             -------------- ^^^^^^^^^^^^^^^^^^^^^ expected `Dim<[usize; 2]>`, found `(i32, i32)`
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Dim<[usize; 2]>`
[INFO] [stdout]                found tuple `(i32, i32)`
[INFO] [stdout] note: required by a bound in `ndarray_rand::RandomExt::random`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-rand-0.14.0/src/lib.rs:91:26
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn random<Sh, IdS>(shape: Sh, distribution: IdS) -> ArrayBase<S, D>
[INFO] [stdout]    |        ------ required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 91 |         Sh: ShapeBuilder<Dim = D>;
[INFO] [stdout]    |                          ^^^^^^^ required by this bound in `RandomExt::random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `(i32, i32): ndarray::Dimension` is not satisfied
[INFO] [stdout]   --> src/main.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |             weights: 0.10 * Array2::random((n_inputs, n_neurons), Uniform::new(0., 10.)),
[INFO] [stdout]    |                             -------------- ^^^^^^^^^^^^^^^^^^^^^ the trait `ndarray::Dimension` is not implemented for `(i32, i32)`
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout]    = help: the following other types implement trait `ndarray::Dimension`:
[INFO] [stdout]              Dim<IxDynImpl>
[INFO] [stdout]              Dim<[usize; 0]>
[INFO] [stdout]              Dim<[usize; 1]>
[INFO] [stdout]              Dim<[usize; 2]>
[INFO] [stdout]              Dim<[usize; 3]>
[INFO] [stdout]              Dim<[usize; 4]>
[INFO] [stdout]              Dim<[usize; 5]>
[INFO] [stdout]              Dim<[usize; 6]>
[INFO] [stdout]    = note: required for `(i32, i32)` to implement `IntoDimension`
[INFO] [stdout]    = note: required for `(i32, i32)` to implement `ShapeBuilder`
[INFO] [stdout] note: required by a bound in `ndarray_rand::RandomExt::random`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-rand-0.14.0/src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn random<Sh, IdS>(shape: Sh, distribution: IdS) -> ArrayBase<S, D>
[INFO] [stdout]    |        ------ required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 91 |         Sh: ShapeBuilder<Dim = D>;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^ required by this bound in `RandomExt::random`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<({integer}, i32) as ShapeBuilder>::Dim == Dim<[usize; 2]>`
[INFO] [stdout]    --> src/main.rs:14:35
[INFO] [stdout]     |
[INFO] [stdout] 14  |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]     |                     ------------- ^^^^^^^^^^^^^^ expected `Dim<[usize; 2]>`, found `({integer}, i32)`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Dim<[usize; 2]>`
[INFO] [stdout]                 found tuple `({integer}, i32)`
[INFO] [stdout] note: required by a bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-0.15.6/src/impl_constructors.rs:343:26
[INFO] [stdout]     |
[INFO] [stdout] 340 |     pub fn zeros<Sh>(shape: Sh) -> Self
[INFO] [stdout]     |            ----- required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 343 |         Sh: ShapeBuilder<Dim = D>,
[INFO] [stdout]     |                          ^^^^^^^ required by this bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `({integer}, i32): ndarray::Dimension` is not satisfied
[INFO] [stdout]    --> src/main.rs:14:35
[INFO] [stdout]     |
[INFO] [stdout] 14  |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]     |                     ------------- ^^^^^^^^^^^^^^ the trait `ndarray::Dimension` is not implemented for `({integer}, i32)`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `ndarray::Dimension`:
[INFO] [stdout]               Dim<IxDynImpl>
[INFO] [stdout]               Dim<[usize; 0]>
[INFO] [stdout]               Dim<[usize; 1]>
[INFO] [stdout]               Dim<[usize; 2]>
[INFO] [stdout]               Dim<[usize; 3]>
[INFO] [stdout]               Dim<[usize; 4]>
[INFO] [stdout]               Dim<[usize; 5]>
[INFO] [stdout]               Dim<[usize; 6]>
[INFO] [stdout]     = note: required for `({integer}, i32)` to implement `IntoDimension`
[INFO] [stdout]     = note: required for `({integer}, i32)` to implement `ShapeBuilder`
[INFO] [stdout] note: required by a bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ndarray-0.15.6/src/impl_constructors.rs:343:13
[INFO] [stdout]     |
[INFO] [stdout] 340 |     pub fn zeros<Sh>(shape: Sh) -> Self
[INFO] [stdout]     |            ----- required by a bound in this associated function
[INFO] [stdout] ...
[INFO] [stdout] 343 |         Sh: ShapeBuilder<Dim = D>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ndarray::impl_constructors::<impl ArrayBase<S, D>>::zeros`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an array with a fixed size of 1 element, found one with 2 elements
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>`
[INFO] [stdout]               found struct `ArrayBase<OwnedRepr<_>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |             biases: Array2::zeros((1, n_neurons)),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an array with a fixed size of 1 element, found one with 2 elements
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>`
[INFO] [stdout]               found struct `ArrayBase<OwnedRepr<_>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0271, E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0271`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0271, E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0271`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nnfs` (bin "nnfs" test) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `nnfs` (bin "nnfs") due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "cb897704e83f5e3751732673f979417314a566d31fbebca8a9570939cce5e04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb897704e83f5e3751732673f979417314a566d31fbebca8a9570939cce5e04e", kill_on_drop: false }`
[INFO] [stdout] cb897704e83f5e3751732673f979417314a566d31fbebca8a9570939cce5e04e
