[INFO] updating cached repository https://github.com/maxastyler/Spirograph
[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] d639d179214179e4843bca5cbd646dc9a1959e5d
[INFO] testing maxastyler/Spirograph against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxastyler%2FSpirograph" "/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/maxastyler/Spirograph 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/maxastyler/Spirograph
[INFO] finished tweaking git repo https://github.com/maxastyler/Spirograph
[INFO] tweaked toml for git repo https://github.com/maxastyler/Spirograph written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/maxastyler/Spirograph 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] 1882c26dcf54b9aeaf9af4f9f7f520f954a33ff40d344c83bf1c5124b1cc7d05
[INFO] running `"docker" "start" "-a" "1882c26dcf54b9aeaf9af4f9f7f520f954a33ff40d344c83bf1c5124b1cc7d05"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rayon-core v1.3.0
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling scoped_threadpool v0.1.8
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling num-rational v0.1.40
[INFO] [stderr]    Compiling inflate v0.3.3
[INFO] [stderr]    Compiling deflate v0.7.17
[INFO] [stderr]    Compiling coco v0.1.1
[INFO] [stderr]    Compiling rayon v0.8.2
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.13
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling spirograph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:21:15
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn normal(f: &Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (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/main.rs:34:32
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn gen_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:40:35
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:32
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:69
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64 + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:98
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64) + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:91
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                           ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:135
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> Box<Fn(f64) -> f64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:150
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                                      ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `path`
[INFO] [stderr]  --> src/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn path(t: f64) -> (f64, f64) {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `envelope`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn envelope(t: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `double_envelope`
[INFO] [stderr]   --> src/main.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.57s
[INFO] running `"docker" "inspect" "1882c26dcf54b9aeaf9af4f9f7f520f954a33ff40d344c83bf1c5124b1cc7d05"`
[INFO] running `"docker" "rm" "-f" "1882c26dcf54b9aeaf9af4f9f7f520f954a33ff40d344c83bf1c5124b1cc7d05"`
[INFO] [stdout] 1882c26dcf54b9aeaf9af4f9f7f520f954a33ff40d344c83bf1c5124b1cc7d05
[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] f4794420d4bc589d4b15e7e2580713b559f37227b3082fa33c75fd0120f49065
[INFO] running `"docker" "start" "-a" "f4794420d4bc589d4b15e7e2580713b559f37227b3082fa33c75fd0120f49065"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling spirograph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:21:15
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn normal(f: &Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (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/main.rs:34:32
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn gen_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:40:35
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:32
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:69
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64 + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:98
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64) + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:91
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                           ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:135
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> Box<Fn(f64) -> f64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:150
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                                      ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `path`
[INFO] [stderr]  --> src/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn path(t: f64) -> (f64, f64) {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `envelope`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn envelope(t: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `double_envelope`
[INFO] [stderr]   --> src/main.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "f4794420d4bc589d4b15e7e2580713b559f37227b3082fa33c75fd0120f49065"`
[INFO] running `"docker" "rm" "-f" "f4794420d4bc589d4b15e7e2580713b559f37227b3082fa33c75fd0120f49065"`
[INFO] [stdout] f4794420d4bc589d4b15e7e2580713b559f37227b3082fa33c75fd0120f49065
[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] 4f89ee2b33f4b59c45b838aa358244d3eea88f71bc898483f852a04b7e1b332c
[INFO] running `"docker" "start" "-a" "4f89ee2b33f4b59c45b838aa358244d3eea88f71bc898483f852a04b7e1b332c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:21:15
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn normal(f: &Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (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/main.rs:34:32
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn gen_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:40:35
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:32
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:69
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64 + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:46:98
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stderr]    |                                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64) + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:91
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                           ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> (f64, f64)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:135
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> Box<Fn(f64) -> f64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:64:150
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stderr]    |                                                                                                                                                      ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(f64) -> f64`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `path`
[INFO] [stderr]  --> src/main.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn path(t: f64) -> (f64, f64) {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `envelope`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn envelope(t: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `double_envelope`
[INFO] [stderr]   --> src/main.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/spirograph-d6ff7a3e152865a6
[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" "4f89ee2b33f4b59c45b838aa358244d3eea88f71bc898483f852a04b7e1b332c"`
[INFO] running `"docker" "rm" "-f" "4f89ee2b33f4b59c45b838aa358244d3eea88f71bc898483f852a04b7e1b332c"`
[INFO] [stdout] 4f89ee2b33f4b59c45b838aa358244d3eea88f71bc898483f852a04b7e1b332c