[INFO] fetching crate numb_rs 0.0.4...
[INFO] checking numb_rs-0.0.4 against master#9610dfe5a9a731ced1ea4923ecbd0c57fe367898 for beta-170-4
[INFO] extracting crate numb_rs 0.0.4 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate numb_rs 0.0.4 on toolchain 9610dfe5a9a731ced1ea4923ecbd0c57fe367898
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate numb_rs 0.0.4
[INFO] finished tweaking crates.io crate numb_rs 0.0.4
[INFO] tweaked toml for crates.io crate numb_rs 0.0.4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b29761e89a36bc3537f37b450e23878c5d7a68f8ef2005d782519654d18b605
[INFO] running `Command { std: "docker" "start" "-a" "6b29761e89a36bc3537f37b450e23878c5d7a68f8ef2005d782519654d18b605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b29761e89a36bc3537f37b450e23878c5d7a68f8ef2005d782519654d18b605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b29761e89a36bc3537f37b450e23878c5d7a68f8ef2005d782519654d18b605", kill_on_drop: false }`
[INFO] [stdout] 6b29761e89a36bc3537f37b450e23878c5d7a68f8ef2005d782519654d18b605
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e777dad1dde2fdeead600423ccbf4a6654c09b67a7490d331d233272fd59c696
[INFO] running `Command { std: "docker" "start" "-a" "e777dad1dde2fdeead600423ccbf4a6654c09b67a7490d331d233272fd59c696", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking numb_rs v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking plotters v0.3.4
[INFO] [stdout] warning: fields `m` and `n` are never read
[INFO] [stdout]    --> src/dense.rs:563:5
[INFO] [stdout]     |
[INFO] [stdout] 561 | pub struct DenseTranspose<'a, T: Numeric + 'a> {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 562 |     inner: &'a Dense<T>,
[INFO] [stdout] 563 |     m: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout] 564 |     n: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DenseTranspose` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `m` and `n` are never read
[INFO] [stdout]    --> src/dense.rs:570:5
[INFO] [stdout]     |
[INFO] [stdout] 568 | pub struct DenseTransposeMut<'a, T: Numeric + 'a> {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 569 |     inner: &'a mut Dense<T>,
[INFO] [stdout] 570 |     m: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout] 571 |     n: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DenseTransposeMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking regex v1.8.3
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking csv v1.2.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: `#[macro_use]` only has an effect on `extern crate` and modules
[INFO] [stdout]  --> benches/matrix_benchmark.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 116 |         let half = frac32!(1, 2);
[INFO] [stdout]     |                    ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 123 |         let a = frac32!(132, 203);
[INFO] [stdout]     |                 ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 129 |         let a = frac32!(1, 2);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 130 |         let b = frac32!(1, 4);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 132 |         assert_eq!(a + b, frac32!(6, 8));
[INFO] [stdout]     |                           ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 137 |         let a = frac32!(1, 2);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 138 |         let b = frac32!(1, 4);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 140 |         assert_eq!(a - b, frac32!(2, 8));
[INFO] [stdout]     |                           ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 145 |         let a = frac32!(1, 2);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 146 |         let b = frac32!(2, 5);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 148 |         assert_eq!(a * b, frac32!(2, 10));
[INFO] [stdout]     |                           -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 153 |         let a = frac32!(1, 2);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 154 |         let b = frac32!(1, 4);
[INFO] [stdout]     |                 ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 156 |         assert_eq!(a / b, frac32!(4, 2));
[INFO] [stdout]     |                           ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 161 |         let a = frac32!(157684, 511974);
[INFO] [stdout]     |                 ----------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/fraction.rs:25:48
[INFO] [stdout]     |
[INFO] [stdout] 25  |         Fraction::new($num as u32, $den as u32);
[INFO] [stdout]     |                                                ^
[INFO] [stdout] ...
[INFO] [stdout] 162 |         assert_eq!(a.reduce(), frac32!(158, 513))
[INFO] [stdout]     |                                ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: macro invocations at the end of a block are treated as expressions
[INFO] [stdout]     = note: to ignore the value produced by the macro, add a semicolon after the invocation of `frac32`
[INFO] [stdout]     = note: this warning originates in the macro `frac32` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `swap_rows` found for struct `numb_rs::Dense` in the current scope
[INFO] [stdout]   --> benches/matrix_benchmark.rs:13:50
[INFO] [stdout]    |
[INFO] [stdout] 13 |     c.bench_function("row swap", |b| b.iter(|| x.swap_rows(0, 2)));
[INFO] [stdout]    |                                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: /opt/rustwide/workdir/src/matrix.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn swap_rows(&mut self, a: usize, b: usize);
[INFO] [stdout]    |        --------- the method is available for `numb_rs::Dense<{integer}>` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 1  + use numb_rs::matrix::RowOps;
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 13 |     c.bench_function("row swap", |b| b.iter(|| x.swap_mn(0, 2)));
[INFO] [stdout]    |                                                  ~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `numb_rs` (bench "matrix_benchmark") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `m` and `n` are never read
[INFO] [stdout]    --> src/dense.rs:563:5
[INFO] [stdout]     |
[INFO] [stdout] 561 | pub struct DenseTranspose<'a, T: Numeric + 'a> {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 562 |     inner: &'a Dense<T>,
[INFO] [stdout] 563 |     m: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout] 564 |     n: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DenseTranspose` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `m` and `n` are never read
[INFO] [stdout]    --> src/dense.rs:570:5
[INFO] [stdout]     |
[INFO] [stdout] 568 | pub struct DenseTransposeMut<'a, T: Numeric + 'a> {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 569 |     inner: &'a mut Dense<T>,
[INFO] [stdout] 570 |     m: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout] 571 |     n: usize,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DenseTransposeMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/utilities.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         &a.assert_approx_eq(&b, 0.00005);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let _ = &a.assert_approx_eq(&b, 0.00005);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/utilities.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         &a.assert_approx_eq(&b, 0.00005);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let _ = &a.assert_approx_eq(&b, 0.00005);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e777dad1dde2fdeead600423ccbf4a6654c09b67a7490d331d233272fd59c696", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e777dad1dde2fdeead600423ccbf4a6654c09b67a7490d331d233272fd59c696", kill_on_drop: false }`
[INFO] [stdout] e777dad1dde2fdeead600423ccbf4a6654c09b67a7490d331d233272fd59c696
