[INFO] cloning repository https://github.com/maxastyler/Spirograph
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maxastyler/Spirograph" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxastyler%2FSpirograph", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxastyler%2FSpirograph'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d639d179214179e4843bca5cbd646dc9a1959e5d
[INFO] checking maxastyler/Spirograph against master#69fd5e4059f8840f09f60269bcda23dcdcb77151 for pr-135733
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaxastyler%2FSpirograph" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maxastyler/Spirograph on toolchain 69fd5e4059f8840f09f60269bcda23dcdcb77151
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+69fd5e4059f8840f09f60269bcda23dcdcb77151" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/maxastyler/Spirograph already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+69fd5e4059f8840f09f60269bcda23dcdcb77151" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+69fd5e4059f8840f09f60269bcda23dcdcb77151" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 635ae1022b98233d7d28c694cb818ef9c4bc35a14d5201deb18cb1e5ce6fb305
[INFO] running `Command { std: "docker" "start" "-a" "635ae1022b98233d7d28c694cb818ef9c4bc35a14d5201deb18cb1e5ce6fb305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "635ae1022b98233d7d28c694cb818ef9c4bc35a14d5201deb18cb1e5ce6fb305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "635ae1022b98233d7d28c694cb818ef9c4bc35a14d5201deb18cb1e5ce6fb305", kill_on_drop: false }`
[INFO] [stdout] 635ae1022b98233d7d28c694cb818ef9c4bc35a14d5201deb18cb1e5ce6fb305
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+69fd5e4059f8840f09f60269bcda23dcdcb77151" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c39c33604143d3eb71a7c509f6db02f1ec6003a64504bf38f72056ba5d814a2
[INFO] running `Command { std: "docker" "start" "-a" "9c39c33604143d3eb71a7c509f6db02f1ec6003a64504bf38f72056ba5d814a2", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]    Compiling rayon-core v1.3.0
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking adler32 v1.0.2
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking color_quant v1.0.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.8
[INFO] [stderr]     Checking inflate v0.3.3
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking deflate v0.7.17
[INFO] [stderr]     Checking rand v0.3.20
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num-rational v0.1.40
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]     Checking image v0.18.0
[INFO] [stderr]     Checking spirograph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn normal(f: &Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn normal(f: &dyn Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stdout]    |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:34:32
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn gen_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn gen_envelope(h: f64) -> Box<dyn Fn(f64) -> f64> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:40:35
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<dyn Fn(f64) -> f64> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a dyn Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:69
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<dyn Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:98
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<dyn Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:91
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(...
[INFO] [stdout]    |                                                                                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & dyn Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:135
[INFO] [stdout]    |
[INFO] [stdout] 64 | ...path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::V...
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &dyn Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:150
[INFO] [stdout]    |
[INFO] [stdout] 64 | ... Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 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<dyn Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn normal(f: &Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn normal(f: &dyn Fn(f64) -> (f64, f64), dx: f64, t: f64) -> (f64, f64) {
[INFO] [stdout]    |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:34:32
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn gen_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn gen_envelope(h: f64) -> Box<dyn Fn(f64) -> f64> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:40:35
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<dyn Fn(f64) -> f64> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a dyn Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:69
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<dyn Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:46:98
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn envelope_path<'a>(path: &'a Fn(f64) -> (f64, f64), envelope: Box<Fn(f64) -> f64 + 'a>) -> Box<dyn Fn(f64) -> (f64, f64) + 'a> {
[INFO] [stdout]    |                                                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:91
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(...
[INFO] [stdout]    |                                                                                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & dyn Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:135
[INFO] [stdout]    |
[INFO] [stdout] 64 | ...path: & Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::V...
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn spiro_image(img_res: (u32, u32), path_spread: Vec<f64>, path_points: Vec<f64>, path: & Fn(f64) -> (f64, f64), envelope_generator: &dyn Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:64:150
[INFO] [stdout]    |
[INFO] [stdout] 64 | ... Fn(f64) -> (f64, f64), envelope_generator: &Fn(f64) -> Box<Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 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<dyn Fn(f64) -> f64>) -> image::ImageBuffer<image::Luma<u8>, std::vec::Vec<u8>> {
[INFO] [stdout]    |                                                                                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `path` is never used
[INFO] [stdout]  --> src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn path(t: f64) -> (f64, f64) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `envelope` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn envelope(t: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double_envelope` is never used
[INFO] [stdout]   --> src/main.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `path` is never used
[INFO] [stdout]  --> src/main.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn path(t: f64) -> (f64, f64) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `envelope` is never used
[INFO] [stdout]   --> src/main.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn envelope(t: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double_envelope` is never used
[INFO] [stdout]   --> src/main.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn double_envelope(h: f64) -> Box<Fn(f64) -> f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/spirograph-160ca96b7e0598c9.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/spirograph-160ca96b7e0598c9/dep-test-bin-spirograph`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] running `Command { std: "docker" "inspect" "9c39c33604143d3eb71a7c509f6db02f1ec6003a64504bf38f72056ba5d814a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c39c33604143d3eb71a7c509f6db02f1ec6003a64504bf38f72056ba5d814a2", kill_on_drop: false }`
[INFO] [stdout] 9c39c33604143d3eb71a7c509f6db02f1ec6003a64504bf38f72056ba5d814a2