[INFO] updating cached repository https://github.com/bgamari/fcs-sim-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 17ece60d16801058ecfd87e778db3de1731cbbe9
[INFO] testing bgamari/fcs-sim-rs against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbgamari%2Ffcs-sim-rs" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bgamari/fcs-sim-rs on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bgamari/fcs-sim-rs
[INFO] finished tweaking git repo https://github.com/bgamari/fcs-sim-rs
[INFO] tweaked toml for git repo https://github.com/bgamari/fcs-sim-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/bgamari/fcs-sim-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a688b913234046b518c8c0215474302a06b0a017fe0b69cbef8f88a2baa5486a
[INFO] running `"docker" "start" "-a" "a688b913234046b518c8c0215474302a06b0a017fe0b69cbef8f88a2baa5486a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling alga v0.9.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling nalgebra v0.18.0
[INFO] [stderr]    Compiling serde_derive v1.0.91
[INFO] [stderr]    Compiling csv v1.0.7
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the item `Vec` is imported redundantly
[INFO] [stderr]    --> main.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use std::vec::Vec;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `From` is imported redundantly
[INFO] [stderr]    --> main.rs:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 |     use std::convert::From;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Float`
[INFO] [stderr]  --> v3.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use num_traits::{Num, Float};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `results`
[INFO] [stderr]    --> main.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 |     let results: Vec<Vec<LogFloat<f64>>> = sample_idxs.par_iter().map(|i| {
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_results`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `quadrance`
[INFO] [stderr]   --> v3.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn quadrance(&self) -> T where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `norm`
[INFO] [stderr]   --> v3.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn norm(&self) -> T where
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `normalise`
[INFO] [stderr]   --> v3.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn normalise(&self) -> Self where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `zero`
[INFO] [stderr]   --> log_float.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn zero() -> LogFloat<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `exp`
[INFO] [stderr]   --> log_float.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn exp(&self) -> T {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_value`
[INFO] [stderr]   --> log_float.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn to_value(&self) -> T {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `norm_corr`
[INFO] [stderr]    --> main.rs:191:4
[INFO] [stderr]     |
[INFO] [stderr] 191 | fn norm_corr(corr: &Vec<LogFloat<f64>>) -> Vec<f64>
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]    --> main.rs:206:4
[INFO] [stderr]     |
[INFO] [stderr] 206 | fn mean<N, T>(iter: T) -> N where
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `correlate`
[INFO] [stderr]    --> main.rs:215:4
[INFO] [stderr]     |
[INFO] [stderr] 215 | fn correlate(max_tau: usize, tau: usize, vec: &Vec<f64>) -> f64 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> main.rs:186:11
[INFO] [stderr]     |
[INFO] [stderr] 186 |           write_vec(path, tau_ts.iter().zip(&corrs));
[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: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `"docker" "inspect" "a688b913234046b518c8c0215474302a06b0a017fe0b69cbef8f88a2baa5486a"`
[INFO] running `"docker" "rm" "-f" "a688b913234046b518c8c0215474302a06b0a017fe0b69cbef8f88a2baa5486a"`
[INFO] [stdout] a688b913234046b518c8c0215474302a06b0a017fe0b69cbef8f88a2baa5486a
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b3f830f5fb0b493ec0aa3a733998e8689b7d73d1e53cab53428b55f65f64eb0c
[INFO] running `"docker" "start" "-a" "b3f830f5fb0b493ec0aa3a733998e8689b7d73d1e53cab53428b55f65f64eb0c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the item `Vec` is imported redundantly
[INFO] [stderr]    --> main.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use std::vec::Vec;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `From` is imported redundantly
[INFO] [stderr]    --> main.rs:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 |     use std::convert::From;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Float`
[INFO] [stderr]  --> v3.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use num_traits::{Num, Float};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `results`
[INFO] [stderr]    --> main.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 |     let results: Vec<Vec<LogFloat<f64>>> = sample_idxs.par_iter().map(|i| {
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_results`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `quadrance`
[INFO] [stderr]   --> v3.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn quadrance(&self) -> T where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `norm`
[INFO] [stderr]   --> v3.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn norm(&self) -> T where
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `normalise`
[INFO] [stderr]   --> v3.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn normalise(&self) -> Self where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `zero`
[INFO] [stderr]   --> log_float.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn zero() -> LogFloat<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `exp`
[INFO] [stderr]   --> log_float.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn exp(&self) -> T {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_value`
[INFO] [stderr]   --> log_float.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn to_value(&self) -> T {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `norm_corr`
[INFO] [stderr]    --> main.rs:191:4
[INFO] [stderr]     |
[INFO] [stderr] 191 | fn norm_corr(corr: &Vec<LogFloat<f64>>) -> Vec<f64>
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]    --> main.rs:206:4
[INFO] [stderr]     |
[INFO] [stderr] 206 | fn mean<N, T>(iter: T) -> N where
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `correlate`
[INFO] [stderr]    --> main.rs:215:4
[INFO] [stderr]     |
[INFO] [stderr] 215 | fn correlate(max_tau: usize, tau: usize, vec: &Vec<f64>) -> f64 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> main.rs:186:11
[INFO] [stderr]     |
[INFO] [stderr] 186 |           write_vec(path, tau_ts.iter().zip(&corrs));
[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: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `"docker" "inspect" "b3f830f5fb0b493ec0aa3a733998e8689b7d73d1e53cab53428b55f65f64eb0c"`
[INFO] running `"docker" "rm" "-f" "b3f830f5fb0b493ec0aa3a733998e8689b7d73d1e53cab53428b55f65f64eb0c"`
[INFO] [stdout] b3f830f5fb0b493ec0aa3a733998e8689b7d73d1e53cab53428b55f65f64eb0c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a390cbd1e55390654ec7e397fca9945aca2bdde156a3f1d7004bee9d461a22cd
[INFO] running `"docker" "start" "-a" "a390cbd1e55390654ec7e397fca9945aca2bdde156a3f1d7004bee9d461a22cd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: the item `Vec` is imported redundantly
[INFO] [stderr]    --> main.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use std::vec::Vec;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `From` is imported redundantly
[INFO] [stderr]    --> main.rs:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 |     use std::convert::From;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Float`
[INFO] [stderr]  --> v3.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use num_traits::{Num, Float};
[INFO] [stderr]   |                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `results`
[INFO] [stderr]    --> main.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 |     let results: Vec<Vec<LogFloat<f64>>> = sample_idxs.par_iter().map(|i| {
[INFO] [stderr]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_results`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `quadrance`
[INFO] [stderr]   --> v3.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn quadrance(&self) -> T where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `norm`
[INFO] [stderr]   --> v3.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn norm(&self) -> T where
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `normalise`
[INFO] [stderr]   --> v3.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn normalise(&self) -> Self where
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `zero`
[INFO] [stderr]   --> log_float.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn zero() -> LogFloat<T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `exp`
[INFO] [stderr]   --> log_float.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn exp(&self) -> T {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_value`
[INFO] [stderr]   --> log_float.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn to_value(&self) -> T {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `norm_corr`
[INFO] [stderr]    --> main.rs:191:4
[INFO] [stderr]     |
[INFO] [stderr] 191 | fn norm_corr(corr: &Vec<LogFloat<f64>>) -> Vec<f64>
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]    --> main.rs:206:4
[INFO] [stderr]     |
[INFO] [stderr] 206 | fn mean<N, T>(iter: T) -> N where
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `correlate`
[INFO] [stderr]    --> main.rs:215:4
[INFO] [stderr]     |
[INFO] [stderr] 215 | fn correlate(max_tau: usize, tau: usize, vec: &Vec<f64>) -> f64 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> main.rs:186:11
[INFO] [stderr]     |
[INFO] [stderr] 186 |           write_vec(path, tau_ts.iter().zip(&corrs));
[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: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.30s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust-4e0b57b2b08b9436
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a390cbd1e55390654ec7e397fca9945aca2bdde156a3f1d7004bee9d461a22cd"`
[INFO] running `"docker" "rm" "-f" "a390cbd1e55390654ec7e397fca9945aca2bdde156a3f1d7004bee9d461a22cd"`
[INFO] [stdout] a390cbd1e55390654ec7e397fca9945aca2bdde156a3f1d7004bee9d461a22cd