[INFO] updating cached repository https://github.com/margarita-v/optimization_methods_development
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] 1ffb3b35f434c06725c6cf4ed885b736b10bcb1b
[INFO] testing margarita-v/optimization_methods_development against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmargarita-v%2Foptimization_methods_development" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/margarita-v/optimization_methods_development on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/margarita-v/optimization_methods_development
[INFO] finished tweaking git repo https://github.com/margarita-v/optimization_methods_development
[INFO] tweaked toml for git repo https://github.com/margarita-v/optimization_methods_development written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/margarita-v/optimization_methods_development already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] d04093aebaf9c168e911372fd91d16ff8b0863b8b47b2cbaf87429bd3c2e72bf
[INFO] running `"docker" "start" "-a" "d04093aebaf9c168e911372fd91d16ff8b0863b8b47b2cbaf87429bd3c2e72bf"`
[INFO] [stderr]    Compiling optimization_methods_development v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/methods/segment_division.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 |     f:         &Fn(f64) -> f64
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[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/methods/golden_section.rs:11:55
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn golden_section(_a: f64, _b: f64, eps: f64, f: &Fn(f64) -> f64) -> f64 {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |                 let mut result : f64;
[INFO] [stderr]    |                     ----^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "d04093aebaf9c168e911372fd91d16ff8b0863b8b47b2cbaf87429bd3c2e72bf"`
[INFO] running `"docker" "rm" "-f" "d04093aebaf9c168e911372fd91d16ff8b0863b8b47b2cbaf87429bd3c2e72bf"`
[INFO] [stdout] d04093aebaf9c168e911372fd91d16ff8b0863b8b47b2cbaf87429bd3c2e72bf
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f10915b3da08baac5f95c97a593b0e51dcbea0dce1aed426ae63f7ee7985c25a
[INFO] running `"docker" "start" "-a" "f10915b3da08baac5f95c97a593b0e51dcbea0dce1aed426ae63f7ee7985c25a"`
[INFO] [stderr]    Compiling optimization_methods_development v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/methods/segment_division.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 |     f:         &Fn(f64) -> f64
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[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/methods/golden_section.rs:11:55
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn golden_section(_a: f64, _b: f64, eps: f64, f: &Fn(f64) -> f64) -> f64 {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |                 let mut result : f64;
[INFO] [stderr]    |                     ----^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "f10915b3da08baac5f95c97a593b0e51dcbea0dce1aed426ae63f7ee7985c25a"`
[INFO] running `"docker" "rm" "-f" "f10915b3da08baac5f95c97a593b0e51dcbea0dce1aed426ae63f7ee7985c25a"`
[INFO] [stdout] f10915b3da08baac5f95c97a593b0e51dcbea0dce1aed426ae63f7ee7985c25a
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] b898b910d8518d68442cdcf1bd40961fc654370aa0714882c89088f38133bc9f
[INFO] running `"docker" "start" "-a" "b898b910d8518d68442cdcf1bd40961fc654370aa0714882c89088f38133bc9f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/optimization_methods_development-1f548fefdc6d7e7c
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::test_golden_section ... ok
[INFO] [stdout] test test::test_segment_division ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/optimization_methods_development-0b89b2b083133ee1
[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] [stderr]    Doc-tests optimization_methods_development
[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" "b898b910d8518d68442cdcf1bd40961fc654370aa0714882c89088f38133bc9f"`
[INFO] running `"docker" "rm" "-f" "b898b910d8518d68442cdcf1bd40961fc654370aa0714882c89088f38133bc9f"`
[INFO] [stdout] b898b910d8518d68442cdcf1bd40961fc654370aa0714882c89088f38133bc9f