[INFO] fetching crate matio-rs 1.4.1...
[INFO] testing matio-rs-1.4.1 against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] extracting crate matio-rs 1.4.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate matio-rs 1.4.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate matio-rs 1.4.1
[INFO] tweaked toml for crates.io crate matio-rs 1.4.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate matio-rs 1.4.1 on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate matio-rs 1.4.1 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" "+1ef7943ee607160a564655b6596f83670ef95df5" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_derive v2.8.0
[INFO] [stderr]   Downloaded nano-gemm-f32 v0.1.0
[INFO] [stderr]   Downloaded faer-macros v0.21.0
[INFO] [stderr]   Downloaded nano-gemm-codegen v0.1.0
[INFO] [stderr]   Downloaded equator v0.2.2
[INFO] [stderr]   Downloaded nano-gemm-c32 v0.1.0
[INFO] [stderr]   Downloaded py_literal v0.4.0
[INFO] [stderr]   Downloaded equator-macro v0.2.1
[INFO] [stderr]   Downloaded dyn-stack v0.13.0
[INFO] [stderr]   Downloaded faer-traits v0.21.5
[INFO] [stderr]   Downloaded generativity v1.1.0
[INFO] [stderr]   Downloaded pest_meta v2.8.0
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[INFO] [stderr]   Downloaded npyz v0.8.4
[INFO] [stderr]   Downloaded pest_generator v2.8.0
[INFO] [stderr]   Downloaded raw-cpuid v11.5.0
[INFO] [stderr]   Downloaded pest v2.8.0
[INFO] [stderr]   Downloaded nano-gemm-c64 v0.1.0
[INFO] [stderr]   Downloaded nano-gemm-core v0.1.0
[INFO] [stderr]   Downloaded nano-gemm-f64 v0.1.0
[INFO] [stderr]   Downloaded matio-rs_derive v0.1.0
[INFO] [stderr]   Downloaded nalgebra v0.33.0
[INFO] [stderr]   Downloaded matio-rs-sys v0.2.5
[INFO] [stderr]   Downloaded faer v0.21.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89dbc5a569472d22b54710a7997d4ae9e451c515bd77391142bfe673f7963bc7
[INFO] running `Command { std: "docker" "start" "-a" "89dbc5a569472d22b54710a7997d4ae9e451c515bd77391142bfe673f7963bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89dbc5a569472d22b54710a7997d4ae9e451c515bd77391142bfe673f7963bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89dbc5a569472d22b54710a7997d4ae9e451c515bd77391142bfe673f7963bc7", kill_on_drop: false }`
[INFO] [stdout] 89dbc5a569472d22b54710a7997d4ae9e451c515bd77391142bfe673f7963bc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 785d5f232659dba302f54378b45b860329b5d7dcb5acb3d71a1a7aaa313d8c89
[INFO] running `Command { std: "docker" "start" "-a" "785d5f232659dba302f54378b45b860329b5d7dcb5acb3d71a1a7aaa313d8c89", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling bindgen v0.71.1
[INFO] [stderr]    Compiling rustc-hash v2.1.1
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling libloading v0.8.5
[INFO] [stderr]    Compiling cc v1.1.18
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]    Compiling regex-automata v0.4.7
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling regex v1.10.6
[INFO] [stderr]    Compiling prettyplease v0.2.25
[INFO] [stderr]    Compiling matio-rs_derive v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling matio-rs-sys v0.2.5
[INFO] [stderr]    Compiling matio-rs v1.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mat.rs:175:35
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat>> {
[INFO] [stdout]     |                                   ^^^^^                         ^^^^
[INFO] [stdout]     |                                   |                             ||
[INFO] [stdout]     |                                   |                             |the same lifetime is hidden here
[INFO] [stdout]     |                                   |                             the same lifetime is elided here
[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] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat<'_>>> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.01s
[INFO] running `Command { std: "docker" "inspect" "785d5f232659dba302f54378b45b860329b5d7dcb5acb3d71a1a7aaa313d8c89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "785d5f232659dba302f54378b45b860329b5d7dcb5acb3d71a1a7aaa313d8c89", kill_on_drop: false }`
[INFO] [stdout] 785d5f232659dba302f54378b45b860329b5d7dcb5acb3d71a1a7aaa313d8c89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d72d6f6c956eea4d88e5aa59be1011f8aa9b3e56db55dd9ab4c1f8789902f201
[INFO] running `Command { std: "docker" "start" "-a" "d72d6f6c956eea4d88e5aa59be1011f8aa9b3e56db55dd9ab4c1f8789902f201", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling libloading v0.8.5
[INFO] [stderr]    Compiling rustix v1.0.7
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling fastrand v2.1.1
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling tempfile v3.20.0
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling bindgen v0.71.1
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling matio-rs-sys v0.2.5
[INFO] [stderr]    Compiling matio-rs v1.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mat.rs:175:35
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat>> {
[INFO] [stdout]     |                                   ^^^^^                         ^^^^
[INFO] [stdout]     |                                   |                             ||
[INFO] [stdout]     |                                   |                             |the same lifetime is hidden here
[INFO] [stdout]     |                                   |                             the same lifetime is elided here
[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] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat<'_>>> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mat.rs:175:35
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat>> {
[INFO] [stdout]     |                                   ^^^^^                         ^^^^
[INFO] [stdout]     |                                   |                             ||
[INFO] [stdout]     |                                   |                             |the same lifetime is hidden here
[INFO] [stdout]     |                                   |                             the same lifetime is elided here
[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] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat<'_>>> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 33.39s
[INFO] running `Command { std: "docker" "inspect" "d72d6f6c956eea4d88e5aa59be1011f8aa9b3e56db55dd9ab4c1f8789902f201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d72d6f6c956eea4d88e5aa59be1011f8aa9b3e56db55dd9ab4c1f8789902f201", kill_on_drop: false }`
[INFO] [stdout] d72d6f6c956eea4d88e5aa59be1011f8aa9b3e56db55dd9ab4c1f8789902f201
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 95d831e6f9f17c0bb0e4342186da30f7bb2617617e7561cf85798b0207091391
[INFO] running `Command { std: "docker" "start" "-a" "95d831e6f9f17c0bb0e4342186da30f7bb2617617e7561cf85798b0207091391", kill_on_drop: false }`
[INFO] [stderr]    Compiling matio-rs-sys v0.2.5
[INFO] [stderr]    Compiling matio-rs v1.4.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/mat.rs:175:35
[INFO] [stderr]     |
[INFO] [stderr] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat>> {
[INFO] [stderr]     |                                   ^^^^^                         ^^^^
[INFO] [stderr]     |                                   |                             ||
[INFO] [stderr]     |                                   |                             |the same lifetime is hidden here
[INFO] [stderr]     |                                   |                             the same lifetime is elided here
[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] 175 |     pub fn field<S: Into<String>>(&self, name: S) -> Result<Vec<&Mat<'_>>> {
[INFO] [stderr]     |                                                                     ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `matio-rs` (lib) generated 1 warning (run `cargo fix --lib -p matio-rs` to apply 1 suggestion)
[INFO] [stderr] warning: `matio-rs` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/matio_rs-a2649f82a00205b2)
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-fabe08646b8a030c)
[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] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test test_polytype ... ok
[INFO] [stdout] test test_read_write_scalar ... ok
[INFO] [stdout] test test_get_2d ... ok
[INFO] [stdout] test test_struct ... ok
[INFO] [stdout] test test_struct_nested ... ok
[INFO] [stdout] test test_readwrite ... ok
[INFO] [stdout] test test_struct_array ... ok
[INFO] [stdout] test test_read_1d ... ok
[INFO] [stderr]    Doc-tests matio_rs
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test src/lib.rs - (line 119) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 127) ... FAILED
[INFO] [stdout] test src/matfile.rs - matfile::MatFile<'a>::load (line 55) ... ok
[INFO] [stdout] test src/lib.rs - (line 107) ... ok
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] test src/mat.rs - mat::MatFileWrite<'a>::var (line 83) ... ok
[INFO] [stdout] test src/mat.rs - mat::MatFileRead<'a>::var (line 52) ... ok
[INFO] [stdout] test src/mat.rs - mat::MatFileRead<'a>::var (line 63) ... ok
[INFO] [stdout] test src/lib.rs - (line 76) ... ok
[INFO] [stdout] test src/lib.rs - (line 9) ... ok
[INFO] [stdout] test src/matfile.rs - matfile::MatFile<'a>::save (line 84) ... ok
[INFO] [stdout] test src/lib.rs - (line 36) ... ok
[INFO] [stdout] test src/lib.rs - (line 50) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 119) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]  --> src/lib.rs:124:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | let na_v = nalgebra::DVector::from_iterator(5, 0..5);
[INFO] [stdout]   |            ^^^^^^^^ use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `nalgebra`, use `cargo add nalgebra` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]   --> src/lib.rs:126:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | let v: nalgebra::DMatrix<i32> = MatFile::load(file).unwrap().var("na_v").unwrap();
[INFO] [stdout]    |        ^^^^^^^^ use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `nalgebra`, use `cargo add nalgebra` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 127) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]  --> src/lib.rs:132:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | let na_m = nalgebra::DMatrix::from_iterator(3, 2, 0..6);
[INFO] [stdout]   |            ^^^^^^^^ use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `nalgebra`, use `cargo add nalgebra` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]   --> src/lib.rs:134:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | let m: nalgebra::DMatrix<i32> = MatFile::load(file).unwrap().var("na_m").unwrap();
[INFO] [stdout]    |        ^^^^^^^^ use of unresolved module or unlinked crate `nalgebra`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `nalgebra`, use `cargo add nalgebra` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 119)
[INFO] [stdout]     src/lib.rs - (line 127)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 11 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.16s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "95d831e6f9f17c0bb0e4342186da30f7bb2617617e7561cf85798b0207091391", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95d831e6f9f17c0bb0e4342186da30f7bb2617617e7561cf85798b0207091391", kill_on_drop: false }`
[INFO] [stdout] 95d831e6f9f17c0bb0e4342186da30f7bb2617617e7561cf85798b0207091391
