[INFO] updating cached repository https://github.com/CGMossa/univariate_optimisation
[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] 8673cf71137cf491e72b5d7b9dd44589f39dfe83
[INFO] checking CGMossa/univariate_optimisation against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCGMossa%2Funivariate_optimisation" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CGMossa/univariate_optimisation on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/CGMossa/univariate_optimisation
[INFO] finished tweaking git repo https://github.com/CGMossa/univariate_optimisation
[INFO] tweaked toml for git repo https://github.com/CGMossa/univariate_optimisation written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/CGMossa/univariate_optimisation already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=forbid" "-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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e898785b547da300cce8b69487c261ea10a06ae9ee6a6bc4b1c75366cd000bce
[INFO] running `"docker" "start" "-a" "e898785b547da300cce8b69487c261ea10a06ae9ee6a6bc4b1c75366cd000bce"`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking univariate_optimisation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `objective`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let objective = |x: f64| x.ln() / (1f64 + x);
[INFO] [stderr]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_objective`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `diff_objective`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let diff_objective = |x: f64| (1f64 + 1f64 / x - x.ln()) / ((1f64 + x).powi(2));
[INFO] [stderr]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_diff_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_value`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let start_value: f64;
[INFO] [stderr]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let a = domain.start;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let b = domain.end;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `objective`
[INFO] [stderr]   --> src/main.rs:12:32
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn bisection_method<T, F1, F2>(objective: F1, diff_objective: F2, domain: Range<T>)
[INFO] [stderr]    |                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `diff_objective`
[INFO] [stderr]   --> src/main.rs:12:47
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn bisection_method<T, F1, F2>(objective: F1, diff_objective: F2, domain: Range<T>)
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_diff_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bisection_method`
[INFO] [stderr]   --> src/main.rs:12:4
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn bisection_method<T, F1, F2>(objective: F1, diff_objective: F2, domain: Range<T>)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `objective`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let objective = |x: f64| x.ln() / (1f64 + x);
[INFO] [stderr]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_objective`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `diff_objective`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let diff_objective = |x: f64| (1f64 + 1f64 / x - x.ln()) / ((1f64 + x).powi(2));
[INFO] [stderr]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_diff_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_value`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let start_value: f64;
[INFO] [stderr]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_start_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let a = domain.start;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let b = domain.end;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `objective`
[INFO] [stderr]   --> src/main.rs:12:32
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn bisection_method<T, F1, F2>(objective: F1, diff_objective: F2, domain: Range<T>)
[INFO] [stderr]    |                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `diff_objective`
[INFO] [stderr]   --> src/main.rs:12:47
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn bisection_method<T, F1, F2>(objective: F1, diff_objective: F2, domain: Range<T>)
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_diff_objective`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.14s
[INFO] running `"docker" "inspect" "e898785b547da300cce8b69487c261ea10a06ae9ee6a6bc4b1c75366cd000bce"`
[INFO] running `"docker" "rm" "-f" "e898785b547da300cce8b69487c261ea10a06ae9ee6a6bc4b1c75366cd000bce"`
[INFO] [stdout] e898785b547da300cce8b69487c261ea10a06ae9ee6a6bc4b1c75366cd000bce