[INFO] fetching crate matrixlab 0.1.5...
[INFO] testing matrixlab-0.1.5 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate matrixlab 0.1.5 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate matrixlab 0.1.5 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matrixlab 0.1.5
[INFO] finished tweaking crates.io crate matrixlab 0.1.5
[INFO] tweaked toml for crates.io crate matrixlab 0.1.5 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c9915411c3a731a98efd7982bb1870233fc61bda5d747c7b8ef4c934435209c
[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" "8c9915411c3a731a98efd7982bb1870233fc61bda5d747c7b8ef4c934435209c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c9915411c3a731a98efd7982bb1870233fc61bda5d747c7b8ef4c934435209c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c9915411c3a731a98efd7982bb1870233fc61bda5d747c7b8ef4c934435209c", kill_on_drop: false }`
[INFO] [stdout] 8c9915411c3a731a98efd7982bb1870233fc61bda5d747c7b8ef4c934435209c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 519e13c6ffcc33d20bf6b9466767807aaa79f95f2afcad3d744e33f99f2a5c2d
[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" "519e13c6ffcc33d20bf6b9466767807aaa79f95f2afcad3d744e33f99f2a5c2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrixlab v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/matrix/dense.rs:157:100
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let r = q_transpose.safe_mul(self).expect("Error in least squares, multiplication failed");;
[INFO] [stdout]     |                                                                                                    ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/dense.rs:105:21
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .into_iter()
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .iter()
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^                    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/sparse.rs:406:43
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].iter().cycle()
[INFO] [stdout]     |                                           ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `Command { std: "docker" "inspect" "519e13c6ffcc33d20bf6b9466767807aaa79f95f2afcad3d744e33f99f2a5c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519e13c6ffcc33d20bf6b9466767807aaa79f95f2afcad3d744e33f99f2a5c2d", kill_on_drop: false }`
[INFO] [stdout] 519e13c6ffcc33d20bf6b9466767807aaa79f95f2afcad3d744e33f99f2a5c2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b4e3b566fb8f5d47b802b7e5aa403b5beda4e2de16cbb302bd978ccc986fa86f
[INFO] running `Command { std: "docker" "start" "-a" "b4e3b566fb8f5d47b802b7e5aa403b5beda4e2de16cbb302bd978ccc986fa86f", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/matrix/dense.rs:157:100
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let r = q_transpose.safe_mul(self).expect("Error in least squares, multiplication failed");;
[INFO] [stdout]     |                                                                                                    ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/dense.rs:105:21
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .into_iter()
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .iter()
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^                    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/sparse.rs:406:43
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].iter().cycle()
[INFO] [stdout]     |                                           ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matrixlab v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/matrix/dense.rs:157:100
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let r = q_transpose.safe_mul(self).expect("Error in least squares, multiplication failed");;
[INFO] [stdout]     |                                                                                                    ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/dense.rs:105:21
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .into_iter()
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 |                    .iter()
[INFO] [stdout]     |                     ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^                    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/matrix/sparse.rs:406:43
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = [0.0f64].iter().cycle()
[INFO] [stdout]     |                                           ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 406 |         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.51s
[INFO] running `Command { std: "docker" "inspect" "b4e3b566fb8f5d47b802b7e5aa403b5beda4e2de16cbb302bd978ccc986fa86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e3b566fb8f5d47b802b7e5aa403b5beda4e2de16cbb302bd978ccc986fa86f", kill_on_drop: false }`
[INFO] [stdout] b4e3b566fb8f5d47b802b7e5aa403b5beda4e2de16cbb302bd978ccc986fa86f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6f0da9ed67b5369b6c3c735e7fc34450d60f11a27609537932daf5a847f625c2
[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" "6f0da9ed67b5369b6c3c735e7fc34450d60f11a27609537932daf5a847f625c2", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stdout] running 22 tests
[INFO] [stderr]    --> src/matrix/dense.rs:157:100
[INFO] [stdout] test test::dense::matrix::backsolve ... ok
[INFO] [stderr]     |
[INFO] [stdout] test test::dense::orthogonal::matrix_multiplication ... ok
[INFO] [stderr] 157 |         let r = q_transpose.safe_mul(self).expect("Error in least squares, multiplication failed");;
[INFO] [stdout] test test::sparse::iter::all_elements_iter ... ok
[INFO] [stderr]     |                                                                                                    ^ help: remove this semicolon
[INFO] [stdout] test test::sparse::matrix::full_matrix_creation ... ok
[INFO] [stderr]     |
[INFO] [stdout] test test::sparse::matrix::matrix_creation ... ok
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] test test::sparse::sparse_vector_mult::identity_mult ... ok
[INFO] [stderr] 
[INFO] [stdout] test test::sparse::sparse_vector_mult::mult ... ok
[INFO] [stderr] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout] test test::sparse::transpose::transpose_sum ... ok
[INFO] [stderr]    --> src/matrix/dense.rs:105:21
[INFO] [stdout] test test::dense::matrix::matrix_multiplication ... ok
[INFO] [stderr]     |
[INFO] [stdout] test test::sparse::matrix::matrix_sum ... ok
[INFO] [stderr] 105 |                    .into_iter()
[INFO] [stdout] test test::sparse::sparse_vector_mult::bigger_mult ... ok
[INFO] [stderr]     |                     ^^^^^^^^^
[INFO] [stdout] test test::sparse::matrix::out_of_bounds_matrix_creation ... ok
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]     = warning: this changes meaning in Rust 2021
[INFO] [stderr]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stderr]     |
[INFO] [stderr] 105 |                    .iter()
[INFO] [stderr]     |                     ^^^^
[INFO] [stderr] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 || IntoIterator::into_iter([Default::default()])
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^                    ^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stderr]    --> src/matrix/sparse.rs:406:43
[INFO] [stderr]     |
[INFO] [stderr] 406 |         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[INFO] [stderr]     |                                           ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this changes meaning in Rust 2021
[INFO] [stderr]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stderr]     |
[INFO] [stderr] 406 |         let mut x: Vector<f64> = [0.0f64].iter().cycle()
[INFO] [stderr]     |                                           ^^^^
[INFO] [stderr] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stderr]     |
[INFO] [stderr] 406 |         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^        ^
[INFO] [stderr] 
[INFO] [stderr] warning: `matrixlab` (lib) generated 3 warnings
[INFO] [stderr] warning: `matrixlab` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/matrixlab-de04ecc13bc15404)
[INFO] [stdout] test test::sparse::matrix_mult::mult ... ok
[INFO] [stdout] test test::gmres::matrix::iteration_test ... ok
[INFO] [stdout] test test::dense::matrix::vector_multiplication ... ok
[INFO] [stdout] test test::dense::matrix::scalar_multiplication ... ok
[INFO] [stdout] test test::sparse::vector_mult::bigger_mult ... ok
[INFO] [stdout] test test::sparse::vector_mult::identity_mult ... ok
[INFO] [stdout] test test::sparse::vector_mult::mult ... ok
[INFO] [stdout] test test::dense::matrix::least_squares_simple ... ok
[INFO] [stdout] test test::gmres::matrix::exact_test ... ok
[INFO] [stderr]    Doc-tests matrixlab
[INFO] [stdout] test test::gmres::matrix::failure_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.43s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> /opt/rustwide/workdir/src/matrix/dense.rs:157:100
[INFO] [stderr]     |
[INFO] [stderr] 157 |         let r = q_transpose.safe_mul(self).expect("Error in least squares, multiplication failed");;
[INFO] [stderr]     |                                                                                                    ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[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" "6f0da9ed67b5369b6c3c735e7fc34450d60f11a27609537932daf5a847f625c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f0da9ed67b5369b6c3c735e7fc34450d60f11a27609537932daf5a847f625c2", kill_on_drop: false }`
[INFO] [stdout] 6f0da9ed67b5369b6c3c735e7fc34450d60f11a27609537932daf5a847f625c2
