[INFO] fetching crate minilp 0.2.2...
[INFO] testing minilp-0.2.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate minilp 0.2.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate minilp 0.2.2
[INFO] finished tweaking crates.io crate minilp 0.2.2
[INFO] tweaked toml for crates.io crate minilp 0.2.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate minilp 0.2.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate minilp 0.2.2 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded winapi-util v0.1.4
[INFO] [stderr]   Downloaded num-integer v0.1.42
[INFO] [stderr]   Downloaded termcolor v1.1.0
[INFO] [stderr]   Downloaded sprs v0.7.1
[INFO] [stderr]   Downloaded matrixmultiply v0.2.3
[INFO] [stderr]   Downloaded ndarray v0.13.0
[INFO] [stderr]   Downloaded num-traits v0.2.11
[INFO] [stderr]   Downloaded regex v1.3.6
[INFO] [stderr]   Downloaded libc v0.2.68
[INFO] [stderr]   Downloaded hermit-abi v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7493e157bef74ebca703b89bef4d2cfcbd92d1d6c9bd1a9739fd55f86d84e66f
[INFO] running `Command { std: "docker" "start" "-a" "7493e157bef74ebca703b89bef4d2cfcbd92d1d6c9bd1a9739fd55f86d84e66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7493e157bef74ebca703b89bef4d2cfcbd92d1d6c9bd1a9739fd55f86d84e66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7493e157bef74ebca703b89bef4d2cfcbd92d1d6c9bd1a9739fd55f86d84e66f", kill_on_drop: false }`
[INFO] [stdout] 7493e157bef74ebca703b89bef4d2cfcbd92d1d6c9bd1a9739fd55f86d84e66f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9d26c8e609382ef45373c98bf92f2c83ee054be7fcfc2412d2a70de47fc0c01
[INFO] running `Command { std: "docker" "start" "-a" "b9d26c8e609382ef45373c98bf92f2c83ee054be7fcfc2412d2a70de47fc0c01", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling sprs v0.7.1
[INFO] [stderr]    Compiling minilp v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ordering.rs:490:17
[INFO] [stdout]     |
[INFO] [stdout] 490 |             let mut cur_step = dfs_stack.last_mut().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `row2col` and `block_cols` are never read
[INFO] [stdout]    --> src/ordering.rs:547:9
[INFO] [stdout]     |
[INFO] [stdout] 545 | pub struct BlockDiagForm {
[INFO] [stdout]     |            ------------- fields in this struct
[INFO] [stdout] 546 |     /// Row permutation: for each original row its new row number so that diag is nonzero.
[INFO] [stdout] 547 |     pub row2col: Vec<usize>,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 548 |     /// For each block its set of columns (the order of blocks is lower block triangular)
[INFO] [stdout] 549 |     pub block_cols: Vec<Vec<usize>>,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BlockDiagForm` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:350:17
[INFO] [stdout]     |
[INFO] [stdout] 350 |     pub fn iter(&self) -> SolutionIter {
[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] 350 |     pub fn iter(&self) -> SolutionIter<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/helpers.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     vec: &CsVecBase<IStorage, DStorage>,
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 6 |     len: usize,
[INFO] [stdout] 7 | ) -> CsVecView<f64>
[INFO] [stdout]   |      ^^^^^^^^^^^^^^ the same lifetime is hidden 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] 7 | ) -> CsVecView<'_, f64>
[INFO] [stdout]   |                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `Command { std: "docker" "inspect" "b9d26c8e609382ef45373c98bf92f2c83ee054be7fcfc2412d2a70de47fc0c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9d26c8e609382ef45373c98bf92f2c83ee054be7fcfc2412d2a70de47fc0c01", kill_on_drop: false }`
[INFO] [stdout] b9d26c8e609382ef45373c98bf92f2c83ee054be7fcfc2412d2a70de47fc0c01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22db01ce5b1352c5e4ad5252d6c270c6b25c8ac73a7f7564551ea3f6fcb07284
[INFO] running `Command { std: "docker" "start" "-a" "22db01ce5b1352c5e4ad5252d6c270c6b25c8ac73a7f7564551ea3f6fcb07284", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ordering.rs:490:17
[INFO] [stdout]     |
[INFO] [stdout] 490 |             let mut cur_step = dfs_stack.last_mut().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `row2col` and `block_cols` are never read
[INFO] [stdout]    --> src/ordering.rs:547:9
[INFO] [stdout]     |
[INFO] [stdout] 545 | pub struct BlockDiagForm {
[INFO] [stdout]     |            ------------- fields in this struct
[INFO] [stdout] 546 |     /// Row permutation: for each original row its new row number so that diag is nonzero.
[INFO] [stdout] 547 |     pub row2col: Vec<usize>,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 548 |     /// For each block its set of columns (the order of blocks is lower block triangular)
[INFO] [stdout] 549 |     pub block_cols: Vec<Vec<usize>>,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BlockDiagForm` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:350:17
[INFO] [stdout]     |
[INFO] [stdout] 350 |     pub fn iter(&self) -> SolutionIter {
[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] 350 |     pub fn iter(&self) -> SolutionIter<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/helpers.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     vec: &CsVecBase<IStorage, DStorage>,
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 6 |     len: usize,
[INFO] [stdout] 7 | ) -> CsVecView<f64>
[INFO] [stdout]   |      ^^^^^^^^^^^^^^ the same lifetime is hidden 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] 7 | ) -> CsVecView<'_, f64>
[INFO] [stdout]   |                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling minilp v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ordering.rs:490:17
[INFO] [stdout]     |
[INFO] [stdout] 490 |             let mut cur_step = dfs_stack.last_mut().unwrap();
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:350:17
[INFO] [stdout]     |
[INFO] [stdout] 350 |     pub fn iter(&self) -> SolutionIter {
[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] 350 |     pub fn iter(&self) -> SolutionIter<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/helpers.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     vec: &CsVecBase<IStorage, DStorage>,
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 6 |     len: usize,
[INFO] [stdout] 7 | ) -> CsVecView<f64>
[INFO] [stdout]   |      ^^^^^^^^^^^^^^ the same lifetime is hidden 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] 7 | ) -> CsVecView<'_, f64>
[INFO] [stdout]   |                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.67s
[INFO] running `Command { std: "docker" "inspect" "22db01ce5b1352c5e4ad5252d6c270c6b25c8ac73a7f7564551ea3f6fcb07284", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22db01ce5b1352c5e4ad5252d6c270c6b25c8ac73a7f7564551ea3f6fcb07284", kill_on_drop: false }`
[INFO] [stdout] 22db01ce5b1352c5e4ad5252d6c270c6b25c8ac73a7f7564551ea3f6fcb07284
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 67dded509e556bed8326a689fe9f0be6a7143b35dbc2274f74e03572c72cae72
[INFO] running `Command { std: "docker" "start" "-a" "67dded509e556bed8326a689fe9f0be6a7143b35dbc2274f74e03572c72cae72", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ordering.rs:490:17
[INFO] [stderr]     |
[INFO] [stderr] 490 |             let mut cur_step = dfs_stack.last_mut().unwrap();
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `row2col` and `block_cols` are never read
[INFO] [stderr]    --> src/ordering.rs:547:9
[INFO] [stderr]     |
[INFO] [stderr] 545 | pub struct BlockDiagForm {
[INFO] [stderr]     |            ------------- fields in this struct
[INFO] [stderr] 546 |     /// Row permutation: for each original row its new row number so that diag is nonzero.
[INFO] [stderr] 547 |     pub row2col: Vec<usize>,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr] 548 |     /// For each block its set of columns (the order of blocks is lower block triangular)
[INFO] [stderr] 549 |     pub block_cols: Vec<Vec<usize>>,
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `BlockDiagForm` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:350:17
[INFO] [stderr]     |
[INFO] [stderr] 350 |     pub fn iter(&self) -> SolutionIter {
[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] 350 |     pub fn iter(&self) -> SolutionIter<'_> {
[INFO] [stderr]     |                                       ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]  --> src/helpers.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 |     vec: &CsVecBase<IStorage, DStorage>,
[INFO] [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stderr] 6 |     len: usize,
[INFO] [stderr] 7 | ) -> CsVecView<f64>
[INFO] [stderr]   |      ^^^^^^^^^^^^^^ the same lifetime is hidden 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] 7 | ) -> CsVecView<'_, f64>
[INFO] [stderr]   |                +++
[INFO] [stderr] 
[INFO] [stderr] warning: `minilp` (lib) generated 4 warnings (run `cargo fix --lib -p minilp` to apply 3 suggestions)
[INFO] [stderr] warning: `minilp` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/minilp-4cf4a8ffd5d13bad)
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test mps::tests::test_parse_mps_file ... ok
[INFO] [stdout] test lu::tests::lu_rand ... ok
[INFO] [stdout] test ordering::tests::block_diag_form ... ok
[INFO] [stdout] test lu::tests::lu_singular ... ok
[INFO] [stdout] test ordering::tests::colamd_singular ... ok
[INFO] [stdout] test ordering::tests::diag_matching ... ok
[INFO] [stdout] test solver::tests::initial_solve ... ok
[INFO] [stdout] test tests::empty_expr_constraints ... ok
[INFO] [stdout] test solver::tests::initialize ... ok
[INFO] [stdout] test tests::fix_unfix_var ... ok
[INFO] [stdout] test tests::gomory_cut ... ok
[INFO] [stdout] test tests::add_constraint ... ok
[INFO] [stdout] test tests::optimize ... ok
[INFO] [stdout] test sparse::tests::mat_transpose ... ok
[INFO] [stdout] test tests::free_variables ... ok
[INFO] [stdout] test ordering::tests::colamd ... ok
[INFO] [stderr]    Doc-tests minilp
[INFO] [stdout] test lu::tests::lu_simple ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 26) ... ok
[INFO] [stdout] test src/lib.rs - Problem::add_constraint (line 254) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.42s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "67dded509e556bed8326a689fe9f0be6a7143b35dbc2274f74e03572c72cae72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67dded509e556bed8326a689fe9f0be6a7143b35dbc2274f74e03572c72cae72", kill_on_drop: false }`
[INFO] [stdout] 67dded509e556bed8326a689fe9f0be6a7143b35dbc2274f74e03572c72cae72
