[INFO] fetching crate rtrace 1.0.0...
[INFO] testing rtrace-1.0.0 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate rtrace 1.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rtrace 1.0.0
[INFO] finished tweaking crates.io crate rtrace 1.0.0
[INFO] tweaked toml for crates.io crate rtrace 1.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rtrace 1.0.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 16 packages to highest compatible versions
[INFO] [stderr]       Adding clap v2.34.0 (available: v4.6.7)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `rtrace` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf
[INFO] running `Command { std: "docker" "start" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `rtrace` (manifest) generated 1 warning
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling rtrace v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/rust/primitive.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn intersect(&self, &mut Hit, ray: &Ray);
[INFO] [stdout]    |                         ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut Hit`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 |             distance: f32::INFINITY,
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:30:31
[INFO] [stdout]    |
[INFO] [stdout] 30 |         self.distance == f32::INFINITY
[INFO] [stdout]    |                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:34:30
[INFO] [stdout]    |
[INFO] [stdout] 34 |         self.distance = f32::INFINITY;
[INFO] [stdout]    |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:61:25
[INFO] [stdout]    |
[INFO] [stdout] 61 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::EPSILON`: replaced by the `EPSILON` associated constant on `f32`
[INFO] [stdout]    --> src/rust/render.rs:199:84
[INFO] [stdout]     |
[INFO] [stdout] 199 |         let p = r.pos + (r.dir.mulfed(h.distance)) + *h.pos.mulf(h.distance * f32::EPSILON.sqrt());
[INFO] [stdout]     |                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:262:32
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut RGBABufferWriter,
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut dyn RGBABufferWriter,
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:364:23
[INFO] [stdout]     |
[INFO] [stdout] 364 |         let out: &mut io::Write = match *self.out {
[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/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] 364 |         let out: &mut dyn io::Write = match *self.out {
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `rtrace` (manifest) generated 1 warning
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/rust/primitive.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn intersect(&self, &mut Hit, ray: &Ray);
[INFO] [stdout]    |                         ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut Hit`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 |             distance: f32::INFINITY,
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:30:31
[INFO] [stdout]    |
[INFO] [stdout] 30 |         self.distance == f32::INFINITY
[INFO] [stdout]    |                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:34:30
[INFO] [stdout]    |
[INFO] [stdout] 34 |         self.distance = f32::INFINITY;
[INFO] [stdout]    |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:61:25
[INFO] [stdout]    |
[INFO] [stdout] 61 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::EPSILON`: replaced by the `EPSILON` associated constant on `f32`
[INFO] [stdout]    --> src/rust/render.rs:199:84
[INFO] [stdout]     |
[INFO] [stdout] 199 |         let p = r.pos + (r.dir.mulfed(h.distance)) + *h.pos.mulf(h.distance * f32::EPSILON.sqrt());
[INFO] [stdout]     |                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:262:32
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut RGBABufferWriter,
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut dyn RGBABufferWriter,
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:364:23
[INFO] [stdout]     |
[INFO] [stdout] 364 |         let out: &mut io::Write = match *self.out {
[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/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] 364 |         let out: &mut dyn io::Write = match *self.out {
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rtrace v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/rust/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/rust/primitive.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn intersect(&self, &mut Hit, ray: &Ray);
[INFO] [stdout]    |                         ^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut Hit`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2018/trait-fn-parameters.html>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:24:28
[INFO] [stdout]    |
[INFO] [stdout] 24 |             distance: f32::INFINITY,
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:30:31
[INFO] [stdout]    |
[INFO] [stdout] 30 |         self.distance == f32::INFINITY
[INFO] [stdout]    |                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:34:30
[INFO] [stdout]    |
[INFO] [stdout] 34 |         self.distance = f32::INFINITY;
[INFO] [stdout]    |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:61:25
[INFO] [stdout]    |
[INFO] [stdout] 61 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]   --> src/rust/primitive.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |             return f32::INFINITY;
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::INFINITY`: replaced by the `INFINITY` associated constant on `f32`
[INFO] [stdout]    --> src/rust/primitive.rs:154:34
[INFO] [stdout]     |
[INFO] [stdout] 154 |             assert_eq!(dfr, f32::INFINITY);
[INFO] [stdout]     |                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::f32::EPSILON`: replaced by the `EPSILON` associated constant on `f32`
[INFO] [stdout]    --> src/rust/render.rs:199:84
[INFO] [stdout]     |
[INFO] [stdout] 199 |         let p = r.pos + (r.dir.mulfed(h.distance)) + *h.pos.mulf(h.distance * f32::EPSILON.sqrt());
[INFO] [stdout]     |                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:262:32
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut RGBABufferWriter,
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 262 |                   writer: &mut dyn RGBABufferWriter,
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rust/render.rs:364:23
[INFO] [stdout]     |
[INFO] [stdout] 364 |         let out: &mut io::Write = match *self.out {
[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/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] 364 |         let out: &mut dyn io::Write = match *self.out {
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `copy` is assigned to, but never used
[INFO] [stdout]    --> src/rust/vec.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |             let mut copy = v32;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_copy` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `copy` is never read
[INFO] [stdout]    --> src/rust/vec.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             copy.x = 10.0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rtrace` (lib test) due to 1 previous error; 12 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf", kill_on_drop: false }`
[INFO] [stdout] 7d32888a4974c03deb66f9f19319e663c2801785d1ad379007647aa982f728bf
