[INFO] cloning repository https://github.com/sgrif/zomg_rockets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sgrif/zomg_rockets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fzomg_rockets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fzomg_rockets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7ece3700fb05985f59c4d64ab258bfa5498bb242
[INFO] testing sgrif/zomg_rockets against try#61cd42370816fd135c0f3b9debf2f5dfcf194594 for pr-98839
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgrif%2Fzomg_rockets" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sgrif/zomg_rockets on toolchain 61cd42370816fd135c0f3b9debf2f5dfcf194594
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sgrif/zomg_rockets
[INFO] finished tweaking git repo https://github.com/sgrif/zomg_rockets
[INFO] tweaked toml for git repo https://github.com/sgrif/zomg_rockets written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sgrif/zomg_rockets already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b870d2e05fb711164f5b18b5febd5a446d4f92317e96ac0c2f4834a40fca78dd
[INFO] running `Command { std: "docker" "start" "-a" "b870d2e05fb711164f5b18b5febd5a446d4f92317e96ac0c2f4834a40fca78dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b870d2e05fb711164f5b18b5febd5a446d4f92317e96ac0c2f4834a40fca78dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b870d2e05fb711164f5b18b5febd5a446d4f92317e96ac0c2f4834a40fca78dd", kill_on_drop: false }`
[INFO] [stdout] b870d2e05fb711164f5b18b5febd5a446d4f92317e96ac0c2f4834a40fca78dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa0f027dc9d8bba8a78142a8dd87edf7af8140fe1f48e122a65aa5545d3661ef
[INFO] running `Command { std: "docker" "start" "-a" "fa0f027dc9d8bba8a78142a8dd87edf7af8140fe1f48e122a65aa5545d3661ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling ansi_term v0.8.0
[INFO] [stderr]    Compiling ksp_helper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:227:21
[INFO] [stdout]     |
[INFO] [stdout] 227 |     stages: Vec<Box<Stage>>,
[INFO] [stdout]     |                     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 227 -     stages: Vec<Box<Stage>>,
[INFO] [stdout] 227 +     stages: Vec<Box<dyn Stage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:282:25
[INFO] [stdout]     |
[INFO] [stdout] 282 |     current: Option<Box<Stage + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 282 -     current: Option<Box<Stage + 'a>>,
[INFO] [stdout] 282 +     current: Option<Box<dyn Stage + 'a>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:77:40
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 77 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:111:40
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 111 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stdout] 111 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:120:40
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 120 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stdout] 120 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:191:40
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 191 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 191 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:214:40
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 214 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 214 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:232:36
[INFO] [stdout]     |
[INFO] [stdout] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout] 232 +     fn stages<'a>(&'a self) -> Box<dyn Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:232:54
[INFO] [stdout]     |
[INFO] [stdout] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout] 232 +     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<dyn Stage + 'a>> + 'a> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:269:44
[INFO] [stdout]     |
[INFO] [stdout] 269 |     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 269 -     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[INFO] [stdout] 269 +     fn with_payload(mut self, payload: Box<dyn Stage>) -> Self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:292:21
[INFO] [stdout]     |
[INFO] [stdout] 292 |     type Item = Box<Stage + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 292 -     type Item = Box<Stage + 'a>;
[INFO] [stdout] 292 +     type Item = Box<dyn Stage + 'a>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:218:19
[INFO] [stdout]     |
[INFO] [stdout] 218 |         }) as Box<Stage>)
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 218 -         }) as Box<Stage>)
[INFO] [stdout] 218 +         }) as Box<dyn Stage>)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:303:31
[INFO] [stdout]     |
[INFO] [stdout] 303 |                     }) as Box<Stage>
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 303 -                     }) as Box<Stage>
[INFO] [stdout] 303 +                     }) as Box<dyn Stage>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "fa0f027dc9d8bba8a78142a8dd87edf7af8140fe1f48e122a65aa5545d3661ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa0f027dc9d8bba8a78142a8dd87edf7af8140fe1f48e122a65aa5545d3661ef", kill_on_drop: false }`
[INFO] [stdout] fa0f027dc9d8bba8a78142a8dd87edf7af8140fe1f48e122a65aa5545d3661ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c7f53859fa7042d7a5adcb38d90bb6de5d33956f6c00e4e80580a2c25057b89
[INFO] running `Command { std: "docker" "start" "-a" "5c7f53859fa7042d7a5adcb38d90bb6de5d33956f6c00e4e80580a2c25057b89", kill_on_drop: false }`
[INFO] [stderr]    Compiling ksp_helper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:227:21
[INFO] [stdout]     |
[INFO] [stdout] 227 |     stages: Vec<Box<Stage>>,
[INFO] [stdout]     |                     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 227 -     stages: Vec<Box<Stage>>,
[INFO] [stdout] 227 +     stages: Vec<Box<dyn Stage>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:282:25
[INFO] [stdout]     |
[INFO] [stdout] 282 |     current: Option<Box<Stage + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 282 -     current: Option<Box<Stage + 'a>>,
[INFO] [stdout] 282 +     current: Option<Box<dyn Stage + 'a>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:77:40
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 77 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:111:40
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 111 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stdout] 111 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:120:40
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 120 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stdout] 120 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:191:40
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 191 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 191 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:214:40
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn next_stage(&self) -> Option<Box<Stage>> {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 214 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stdout] 214 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:232:36
[INFO] [stdout]     |
[INFO] [stdout] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout] 232 +     fn stages<'a>(&'a self) -> Box<dyn Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:232:54
[INFO] [stdout]     |
[INFO] [stdout] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stdout] 232 +     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<dyn Stage + 'a>> + 'a> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:269:44
[INFO] [stdout]     |
[INFO] [stdout] 269 |     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 269 -     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[INFO] [stdout] 269 +     fn with_payload(mut self, payload: Box<dyn Stage>) -> Self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:292:21
[INFO] [stdout]     |
[INFO] [stdout] 292 |     type Item = Box<Stage + '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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 292 -     type Item = Box<Stage + 'a>;
[INFO] [stdout] 292 +     type Item = Box<dyn Stage + 'a>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:218:19
[INFO] [stdout]     |
[INFO] [stdout] 218 |         }) as Box<Stage>)
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 218 -         }) as Box<Stage>)
[INFO] [stdout] 218 +         }) as Box<dyn Stage>)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:303:31
[INFO] [stdout]     |
[INFO] [stdout] 303 |                     }) as Box<Stage>
[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: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 303 -                     }) as Box<Stage>
[INFO] [stdout] 303 +                     }) as Box<dyn Stage>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "5c7f53859fa7042d7a5adcb38d90bb6de5d33956f6c00e4e80580a2c25057b89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c7f53859fa7042d7a5adcb38d90bb6de5d33956f6c00e4e80580a2c25057b89", kill_on_drop: false }`
[INFO] [stdout] 5c7f53859fa7042d7a5adcb38d90bb6de5d33956f6c00e4e80580a2c25057b89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+61cd42370816fd135c0f3b9debf2f5dfcf194594" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0174732cc1b4555fd067e4eadd165e5040597a0594d1991babb6853aed7369e5
[INFO] running `Command { std: "docker" "start" "-a" "0174732cc1b4555fd067e4eadd165e5040597a0594d1991babb6853aed7369e5", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:227:21
[INFO] [stderr]     |
[INFO] [stderr] 227 |     stages: Vec<Box<Stage>>,
[INFO] [stderr]     |                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 227 -     stages: Vec<Box<Stage>>,
[INFO] [stderr] 227 +     stages: Vec<Box<dyn Stage>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:282:25
[INFO] [stderr]     |
[INFO] [stderr] 282 |     current: Option<Box<Stage + 'a>>,
[INFO] [stderr]     |                         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 282 -     current: Option<Box<Stage + 'a>>,
[INFO] [stderr] 282 +     current: Option<Box<dyn Stage + 'a>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:77:40
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 77 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr] 77 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:111:40
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stderr]     |                                        ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 111 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stderr] 111 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:120:40
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stderr]     |                                        ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 120 -     fn next_stage(&self) -> Option<Box<Stage>> { (&**self).next_stage() }
[INFO] [stderr] 120 +     fn next_stage(&self) -> Option<Box<dyn Stage>> { (&**self).next_stage() }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:191:40
[INFO] [stderr]     |
[INFO] [stderr] 191 |     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr]     |                                        ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 191 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr] 191 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:214:40
[INFO] [stderr]     |
[INFO] [stderr] 214 |     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr]     |                                        ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 214 -     fn next_stage(&self) -> Option<Box<Stage>> {
[INFO] [stderr] 214 +     fn next_stage(&self) -> Option<Box<dyn Stage>> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:232:36
[INFO] [stderr]     |
[INFO] [stderr] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stderr] 232 +     fn stages<'a>(&'a self) -> Box<dyn Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:232:54
[INFO] [stderr]     |
[INFO] [stderr] 232 |     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stderr]     |                                                      ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 232 -     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<Stage + 'a>> + 'a> {
[INFO] [stderr] 232 +     fn stages<'a>(&'a self) -> Box<Iterator<Item=Box<dyn Stage + 'a>> + 'a> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:269:44
[INFO] [stderr]     |
[INFO] [stderr] 269 |     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[INFO] [stderr]     |                                            ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 269 -     fn with_payload(mut self, payload: Box<Stage>) -> Self {
[INFO] [stderr] 269 +     fn with_payload(mut self, payload: Box<dyn Stage>) -> Self {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:292:21
[INFO] [stderr]     |
[INFO] [stderr] 292 |     type Item = Box<Stage + 'a>;
[INFO] [stderr]     |                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 292 -     type Item = Box<Stage + 'a>;
[INFO] [stderr] 292 +     type Item = Box<dyn Stage + 'a>;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:218:19
[INFO] [stderr]     |
[INFO] [stderr] 218 |         }) as Box<Stage>)
[INFO] [stderr]     |                   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 218 -         }) as Box<Stage>)
[INFO] [stderr] 218 +         }) as Box<dyn Stage>)
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:303:31
[INFO] [stderr]     |
[INFO] [stderr] 303 |                     }) as Box<Stage>
[INFO] [stderr]     |                               ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 303 -                     }) as Box<Stage>
[INFO] [stderr] 303 +                     }) as Box<dyn Stage>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `ksp_helper` (bin "ksp_helper" test) generated 13 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ksp_helper-9ecf61f1e59f533b)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0174732cc1b4555fd067e4eadd165e5040597a0594d1991babb6853aed7369e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0174732cc1b4555fd067e4eadd165e5040597a0594d1991babb6853aed7369e5", kill_on_drop: false }`
[INFO] [stdout] 0174732cc1b4555fd067e4eadd165e5040597a0594d1991babb6853aed7369e5