[INFO] fetching crate matrixlab 0.1.5...
[INFO] checking matrixlab-0.1.5 against master#042c759f774872cf2f94c6685ce87e24c046c722 for pr-156977
[INFO] extracting crate matrixlab 0.1.5 into /workspace/builds/worker-7-tc1/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-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate matrixlab 0.1.5 on toolchain 042c759f774872cf2f94c6685ce87e24c046c722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+042c759f774872cf2f94c6685ce87e24c046c722" "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" "+042c759f774872cf2f94c6685ce87e24c046c722" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]       Adding proptest v0.9.6 (available: v1.11.0)
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7ad640603f8ff44daca894944284fb6a18bd8ff7bdab2d0593d900c77df2ce35
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[INFO] [stderr]    Compiling getrandom v0.4.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]    Compiling rand v0.6.5
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[INFO] [stderr]     Checking proptest v0.9.6
[INFO] [stderr]     Checking 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] [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 6.45s
[INFO] running `Command { std: "docker" "inspect" "7ad640603f8ff44daca894944284fb6a18bd8ff7bdab2d0593d900c77df2ce35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ad640603f8ff44daca894944284fb6a18bd8ff7bdab2d0593d900c77df2ce35", kill_on_drop: false }`
[INFO] [stdout] 7ad640603f8ff44daca894944284fb6a18bd8ff7bdab2d0593d900c77df2ce35
