[INFO] crate vikos 0.3.1 is already in cache
[INFO] testing vikos-0.3.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate vikos 0.3.1 into work/builds/worker-8/source
[INFO] validating manifest of crates.io crate vikos 0.3.1 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 crates.io crate vikos 0.3.1
[INFO] finished tweaking crates.io crate vikos 0.3.1
[INFO] tweaked toml for crates.io crate vikos 0.3.1 written to work/builds/worker-8/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 3a5bbf66b37a7d45e7a4daa63f076bd9f659f9bcb56face58663e264941a2e5f
[INFO] running `"docker" "start" "-a" "3a5bbf66b37a7d45e7a4daa63f076bd9f659f9bcb56face58663e264941a2e5f"`
[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-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling vikos v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `"docker" "inspect" "3a5bbf66b37a7d45e7a4daa63f076bd9f659f9bcb56face58663e264941a2e5f"`
[INFO] running `"docker" "rm" "-f" "3a5bbf66b37a7d45e7a4daa63f076bd9f659f9bcb56face58663e264941a2e5f"`
[INFO] [stdout] 3a5bbf66b37a7d45e7a4daa63f076bd9f659f9bcb56face58663e264941a2e5f
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 47fcf3cae9fe992aeaf783a3042fd5a65b2a17175b09d14723dcb5df91cf5a15
[INFO] running `"docker" "start" "-a" "47fcf3cae9fe992aeaf783a3042fd5a65b2a17175b09d14723dcb5df91cf5a15"`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling regex-automata v0.1.8
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling bstr v0.2.8
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling vikos v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/cost.rs:117:40
[INFO] [stderr]     |
[INFO] [stderr] 117 |     fn approx_derivate<T: Copy>(cost: &Cost<T>, prediction: f64, truth: T) -> f64 {
[INFO] [stderr]     |                                        ^^^^^^^ help: use `dyn`: `dyn Cost<T>`
[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/cost.rs:129:39
[INFO] [stderr]     |
[INFO] [stderr] 129 |     fn check_derivate<T: Copy>(cost: &Cost<T>, prediction: f64, truth: T) -> f64 {
[INFO] [stderr]     |                                       ^^^^^^^ help: use `dyn`: `dyn Cost<T>`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.08s
[INFO] running `"docker" "inspect" "47fcf3cae9fe992aeaf783a3042fd5a65b2a17175b09d14723dcb5df91cf5a15"`
[INFO] running `"docker" "rm" "-f" "47fcf3cae9fe992aeaf783a3042fd5a65b2a17175b09d14723dcb5df91cf5a15"`
[INFO] [stdout] 47fcf3cae9fe992aeaf783a3042fd5a65b2a17175b09d14723dcb5df91cf5a15
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] 8fcbd55cf17ba98cc2959a56800cca7bffd2c8bbb27d774fbe1a704741ba1460
[INFO] running `"docker" "start" "-a" "8fcbd55cf17ba98cc2959a56800cca7bffd2c8bbb27d774fbe1a704741ba1460"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/vikos-89a623d3076811c3
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test cost::test::least_squares_derivation ... ok
[INFO] [stdout] test cost::test::least_absolute_derivation ... ok
[INFO] [stdout] test linear_algebra::tests::dot ... ok
[INFO] [stdout] test cost::test::neg_log_likelihood_derivation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lib-081f82fc15dbd535
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test estimate_mean ... ok
[INFO] [stdout] test estimate_median ... ok
[INFO] [stdout] test generalized_linear_model_as_logistic_regression ... ok
[INFO] [stdout] test linear_stochastic_gradient_descent_iter ... ok
[INFO] [stdout] test logistic_sgd_2d_max_likelihood ... ok
[INFO] [stdout] test logistic_sgd_2d_max_likelihood_bool ... ok
[INFO] [stdout] test logistic_adagard_2d_max_likelihood_bool ... ok
[INFO] [stdout] test logistic_sgd_2d_least_squares ... ok
[INFO] [stdout] test linear_stochastic_gradient_descent ... ok
[INFO] [stdout] test linear_sgd_2d ... ok
[INFO] [stdout] test linear_nesterov_2d ... ok
[INFO] [stdout] test iris ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests vikos
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/tutorial.rs - tutorial (line 13) ... ok
[INFO] [stdout] test src/tutorial.rs - tutorial (line 29) ... ok
[INFO] [stdout] test src/model.rs - model::GeneralizedLinearModel (line 154) ... ok
[INFO] [stdout] test src/cost.rs - cost::MaxLikelihood (line 49) ... ok
[INFO] [stdout] test src/tutorial.rs - tutorial (line 61) ... ok
[INFO] [stdout] test src/tutorial.rs - tutorial (line 120) ... ok
[INFO] [stdout] test src/tutorial.rs - tutorial (line 86) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8fcbd55cf17ba98cc2959a56800cca7bffd2c8bbb27d774fbe1a704741ba1460"`
[INFO] running `"docker" "rm" "-f" "8fcbd55cf17ba98cc2959a56800cca7bffd2c8bbb27d774fbe1a704741ba1460"`
[INFO] [stdout] 8fcbd55cf17ba98cc2959a56800cca7bffd2c8bbb27d774fbe1a704741ba1460