[INFO] updating cached repository Axect/Peroxide
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Axect/Peroxide
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Axect/Peroxide" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Axect/Peroxide"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Axect/Peroxide'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Axect/Peroxide" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Axect/Peroxide"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Axect/Peroxide'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 837263b1f912ce18b5d9103faee45b62bee6b78f
[INFO] sha for GitHub repo Axect/Peroxide: 837263b1f912ce18b5d9103faee45b62bee6b78f
[INFO] validating manifest of Axect/Peroxide on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Axect/Peroxide on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Axect/Peroxide
[INFO] finished frobbing Axect/Peroxide
[INFO] frobbed toml for Axect/Peroxide written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/Axect/Peroxide/Cargo.toml
[INFO] started frobbing Axect/Peroxide
[INFO] finished frobbing Axect/Peroxide
[INFO] frobbed toml for Axect/Peroxide written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Axect/Peroxide/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Axect/Peroxide against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/Axect/Peroxide:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fbdf33cab2f18fe697bfa972a86ec02ac81c73bbd172fd86f06779b88c294c0f
[INFO] running `"docker" "start" "-a" "fbdf33cab2f18fe697bfa972a86ec02ac81c73bbd172fd86f06779b88c294c0f"`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking special v0.8.1
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking serde-pickle v0.4.1
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking bstr v0.2.7
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking peroxide v0.10.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:450:60
[INFO] [stderr]     |
[INFO] [stderr] 450 |     pub fn write(&self, file_path: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                            ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:475:80
[INFO] [stderr]     |
[INFO] [stderr] 475 |     pub fn write_round(&self, file_path: &str, round: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:490:91
[INFO] [stderr]     |
[INFO] [stderr] 490 |     pub fn write_with_header(&self, file_path: &str, header: Vec<&str>) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:507:111
[INFO] [stderr]     |
[INFO] [stderr] 507 |     pub fn write_with_header_round(&self, file_path: &str, header: Vec<&str>, round: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:544:87
[INFO] [stderr]     |
[INFO] [stderr] 544 |     pub fn read(file_path: &str, header: bool, delimiter: char) -> Result<Matrix, Box<Error>> {
[INFO] [stderr]     |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::E`
[INFO] [stderr]  --> src/structure/dual.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::f64::consts::E;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/structure/dual.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Real`
[INFO] [stderr]  --> src/structure/dual.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use Real;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Real`
[INFO] [stderr]  --> src/structure/hyper_dual.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use Real;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/util/pickle.rs:22:29
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let mut writer: Box<Write>;
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/util/pickle.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |         let mut writer: Box<Write>;
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/util/writer.rs:109:29
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut writer: Box<Write>;
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:450:60
[INFO] [stderr]     |
[INFO] [stderr] 450 |     pub fn write(&self, file_path: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                            ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:475:80
[INFO] [stderr]     |
[INFO] [stderr] 475 |     pub fn write_round(&self, file_path: &str, round: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:490:91
[INFO] [stderr]     |
[INFO] [stderr] 490 |     pub fn write_with_header(&self, file_path: &str, header: Vec<&str>) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                           ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:507:111
[INFO] [stderr]     |
[INFO] [stderr] 507 |     pub fn write_with_header_round(&self, file_path: &str, header: Vec<&str>, round: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structure/matrix.rs:544:87
[INFO] [stderr]     |
[INFO] [stderr] 544 |     pub fn read(file_path: &str, header: bool, delimiter: char) -> Result<Matrix, Box<Error>> {
[INFO] [stderr]     |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::E`
[INFO] [stderr]  --> src/structure/dual.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::f64::consts::E;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/structure/dual.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Real`
[INFO] [stderr]  --> src/structure/dual.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use Real;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Real`
[INFO] [stderr]  --> src/structure/hyper_dual.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use Real;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/util/pickle.rs:22:29
[INFO] [stderr]    |
[INFO] [stderr] 22 |         let mut writer: Box<Write>;
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/util/pickle.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |         let mut writer: Box<Write>;
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/util/writer.rs:109:29
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut writer: Box<Write>;
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/structure/dual.rs:138:18
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn rem(self, rhs: Dual) -> Dual {
[INFO] [stderr]     |                  ^^^ help: consider prefixing with an underscore: `_rhs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/structure/dual.rs:138:18
[INFO] [stderr]     |
[INFO] [stderr] 138 |     fn rem(self, rhs: Dual) -> Dual {
[INFO] [stderr]     |                  ^^^ help: consider prefixing with an underscore: `_rhs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/util/writer.rs:139:21
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     mat.write_pickle(&mut writer);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/util/writer.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                     vec.write_pickle(&mut writer);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/util/writer.rs:139:21
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     mat.write_pickle(&mut writer);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/util/writer.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                     vec.write_pickle(&mut writer);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Mul`
[INFO] [stderr]  --> src/bin/arnoldi.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Mul;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::max`
[INFO] [stderr]  --> src/bin/arnoldi.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cmp::max;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tau` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut tau = 0f64;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `gamma` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut gamma = 0f64;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sigma` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut sigma = 0f64;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tau` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         tau = 0f64;
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Mul`
[INFO] [stderr]  --> src/bin/arnoldi.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Mul;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::max`
[INFO] [stderr]  --> src/bin/arnoldi.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::cmp::max;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tau` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut tau = 0f64;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `gamma` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut gamma = 0f64;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sigma` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut sigma = 0f64;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tau` is never read
[INFO] [stderr]   --> src/bin/arnoldi.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         tau = 0f64;
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Add`
[INFO] [stderr]  --> src/bin/butcher.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Add;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f`
[INFO] [stderr]   --> src/bin/butcher.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn f<T: Real>(t: T, x: T) -> T {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Add`
[INFO] [stderr]  --> src/bin/butcher.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Add;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f`
[INFO] [stderr]   --> src/bin/butcher.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn f<T: Real>(t: T, x: T) -> T {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.59s
[INFO] running `"docker" "inspect" "fbdf33cab2f18fe697bfa972a86ec02ac81c73bbd172fd86f06779b88c294c0f"`
[INFO] running `"docker" "rm" "-f" "fbdf33cab2f18fe697bfa972a86ec02ac81c73bbd172fd86f06779b88c294c0f"`
[INFO] [stdout] fbdf33cab2f18fe697bfa972a86ec02ac81c73bbd172fd86f06779b88c294c0f