[INFO] fetching crate matrixlab 0.1.5...
[INFO] testing matrixlab-0.1.5 against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] extracting crate matrixlab 0.1.5 into /workspace/builds/worker-2-tc2/source
[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-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate matrixlab 0.1.5 on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 84 packages to latest compatible versions
[INFO] [stderr]       Adding proptest v0.9.6 (available: v1.11.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fedbe85e92ec651b6902611d24917926a065f8d35ecc6f6b5d4cf00411441e2a
[INFO] running `Command { std: "docker" "start" "-a" "fedbe85e92ec651b6902611d24917926a065f8d35ecc6f6b5d4cf00411441e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fedbe85e92ec651b6902611d24917926a065f8d35ecc6f6b5d4cf00411441e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fedbe85e92ec651b6902611d24917926a065f8d35ecc6f6b5d4cf00411441e2a", kill_on_drop: false }`
[INFO] [stdout] fedbe85e92ec651b6902611d24917926a065f8d35ecc6f6b5d4cf00411441e2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 007cb366026bc3125f0346ba30c9cb2305e91961520ff26dd1a32ac179b39435
[INFO] running `Command { std: "docker" "start" "-a" "007cb366026bc3125f0346ba30c9cb2305e91961520ff26dd1a32ac179b39435", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon v1.11.0
[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)]` (part of `#[warn(unused)]`) 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]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 -                    .into_iter()
[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 -                 || [Default::default()]
[INFO] [stdout] 105 -                    .into_iter()
[INFO] [stdout] 104 +                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:252:21
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<A> {
[INFO] [stdout]     |                     ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<'_, A> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:257:25
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<A> {
[INFO] [stdout]     |                         ^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<'_, A> {
[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 <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 -         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[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> = [0.0f64].into_iter().cycle()
[INFO] [stdout] 406 +         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.89s
[INFO] running `Command { std: "docker" "inspect" "007cb366026bc3125f0346ba30c9cb2305e91961520ff26dd1a32ac179b39435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "007cb366026bc3125f0346ba30c9cb2305e91961520ff26dd1a32ac179b39435", kill_on_drop: false }`
[INFO] [stdout] 007cb366026bc3125f0346ba30c9cb2305e91961520ff26dd1a32ac179b39435
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72d2841673f6a93835ad03c70c5b614150e213eceb6f73c6da2edea36da9eaf5
[INFO] running `Command { std: "docker" "start" "-a" "72d2841673f6a93835ad03c70c5b614150e213eceb6f73c6da2edea36da9eaf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling byteorder v1.5.0
[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)]` (part of `#[warn(unused)]`) 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]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 -                    .into_iter()
[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 -                 || [Default::default()]
[INFO] [stdout] 105 -                    .into_iter()
[INFO] [stdout] 104 +                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:252:21
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<A> {
[INFO] [stdout]     |                     ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<'_, A> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:257:25
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<A> {
[INFO] [stdout]     |                         ^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<'_, A> {
[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 <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 -         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[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> = [0.0f64].into_iter().cycle()
[INFO] [stdout] 406 +         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling proptest v0.9.6
[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)]` (part of `#[warn(unused)]`) 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]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 105 -                    .into_iter()
[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 -                 || [Default::default()]
[INFO] [stdout] 105 -                    .into_iter()
[INFO] [stdout] 104 +                 || IntoIterator::into_iter([Default::default()])
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:252:21
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<A> {
[INFO] [stdout]     |                     ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn elements(&self) -> ElementsIter<'_, A> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matrix/sparse.rs:257:25
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<A> {
[INFO] [stdout]     |                         ^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 257 |     pub fn all_elements(&self) -> MatrixIter<'_, A> {
[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 <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 406 -         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[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> = [0.0f64].into_iter().cycle()
[INFO] [stdout] 406 +         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 10.91s
[INFO] running `Command { std: "docker" "inspect" "72d2841673f6a93835ad03c70c5b614150e213eceb6f73c6da2edea36da9eaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d2841673f6a93835ad03c70c5b614150e213eceb6f73c6da2edea36da9eaf5", kill_on_drop: false }`
[INFO] [stdout] 72d2841673f6a93835ad03c70c5b614150e213eceb6f73c6da2edea36da9eaf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5fe489f94c3ad354911667831fa396e2d875187dece9062d5372d6633bc06540
[INFO] running `Command { std: "docker" "start" "-a" "5fe489f94c3ad354911667831fa396e2d875187dece9062d5372d6633bc06540", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> 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)]` (part of `#[warn(unused)]`) on by default
[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/dense.rs:105:21
[INFO] [stderr]     |
[INFO] [stderr] 105 |                    .into_iter()
[INFO] [stderr]     |                     ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this changes meaning in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stderr]     = note: `#[warn(array_into_iter)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stderr]     |
[INFO] [stderr] 105 -                    .into_iter()
[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 -                 || [Default::default()]
[INFO] [stderr] 105 -                    .into_iter()
[INFO] [stderr] 104 +                 || IntoIterator::into_iter([Default::default()])
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/matrix/sparse.rs:252:21
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub fn elements(&self) -> ElementsIter<A> {
[INFO] [stderr]     |                     ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub fn elements(&self) -> ElementsIter<'_, A> {
[INFO] [stderr]     |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/matrix/sparse.rs:257:25
[INFO] [stderr]     |
[INFO] [stderr] 257 |     pub fn all_elements(&self) -> MatrixIter<A> {
[INFO] [stderr]     |                         ^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 257 |     pub fn all_elements(&self) -> MatrixIter<'_, A> {
[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 <https://doc.rust-lang.org/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stderr] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stderr]     |
[INFO] [stderr] 406 -         let mut x: Vector<f64> = [0.0f64].into_iter().cycle()
[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> = [0.0f64].into_iter().cycle()
[INFO] [stderr] 406 +         let mut x: Vector<f64> = IntoIterator::into_iter([0.0f64]).cycle()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `matrixlab` (lib) generated 5 warnings (run `cargo fix --lib -p matrixlab` to apply 4 suggestions)
[INFO] [stderr] warning: `matrixlab` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/matrixlab-ec486b7bb477dce2)
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test test::dense::matrix::backsolve ... ok
[INFO] [stdout] test test::dense::orthogonal::matrix_multiplication ... ok
[INFO] [stdout] test test::sparse::iter::all_elements_iter ... ok
[INFO] [stdout] test test::sparse::matrix::full_matrix_creation ... ok
[INFO] [stdout] test test::sparse::matrix::matrix_creation ... ok
[INFO] [stdout] test test::dense::matrix::vector_multiplication ... ok
[INFO] [stdout] test test::dense::matrix::matrix_multiplication ... ok
[INFO] [stdout] test test::sparse::matrix::out_of_bounds_matrix_creation ... ok
[INFO] [stdout] test test::dense::matrix::least_squares_simple ... ok
[INFO] [stdout] test test::gmres::matrix::exact_test ... ok
[INFO] [stdout] test test::sparse::sparse_vector_mult::bigger_mult ... ok
[INFO] [stdout] test test::sparse::matrix::matrix_sum ... ok
[INFO] [stdout] test test::sparse::matrix_mult::mult ... ok
[INFO] [stdout] test test::sparse::transpose::transpose_sum ... 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::sparse_vector_mult::identity_mult ... ok
[INFO] [stdout] test test::sparse::sparse_vector_mult::mult ... ok
[INFO] [stdout] test test::sparse::vector_mult::mult ... ok
[INFO] [stdout] test test::dense::matrix::scalar_multiplication ... ok
[INFO] [stdout] test test::gmres::matrix::iteration_test ... ok
[INFO] [stdout] test test::gmres::matrix::failure_test ... ok
[INFO] [stderr]    Doc-tests matrixlab
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.17s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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" "5fe489f94c3ad354911667831fa396e2d875187dece9062d5372d6633bc06540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe489f94c3ad354911667831fa396e2d875187dece9062d5372d6633bc06540", kill_on_drop: false }`
[INFO] [stdout] 5fe489f94c3ad354911667831fa396e2d875187dece9062d5372d6633bc06540
