[INFO] fetching crate marid 0.1.0...
[INFO] checking marid-0.1.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate marid 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate marid 0.1.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate marid 0.1.0
[INFO] finished tweaking crates.io crate marid 0.1.0
[INFO] tweaked toml for crates.io crate marid 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chan v0.1.23
[INFO] [stderr]   Downloaded bit-set v0.4.0
[INFO] [stderr]   Downloaded chan-signal v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e455b6129dc038298c0cb329508a37e283a3602dd6256de09d7c6fde4267b17d
[INFO] running `Command { std: "docker" "start" "-a" "e455b6129dc038298c0cb329508a37e283a3602dd6256de09d7c6fde4267b17d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e455b6129dc038298c0cb329508a37e283a3602dd6256de09d7c6fde4267b17d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e455b6129dc038298c0cb329508a37e283a3602dd6256de09d7c6fde4267b17d", kill_on_drop: false }`
[INFO] [stdout] e455b6129dc038298c0cb329508a37e283a3602dd6256de09d7c6fde4267b17d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 649838efa73ccb449fbb7f2a0e7762ceea3275c88784758ccdb4e24f8389f2f9
[INFO] running `Command { std: "docker" "start" "-a" "649838efa73ccb449fbb7f2a0e7762ceea3275c88784758ccdb4e24f8389f2f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking chan v0.1.23
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking chan-signal v0.3.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking marid v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `crossbeam` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crossbeam;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | extern crate crossbeam;
[INFO] [stdout]    | ----------------------- the item `crossbeam` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:52:28
[INFO] [stdout]    |
[INFO] [stdout] 52 |             State::Init => try!(self.setup()),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |             try!(r.setup());
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/test_helpers.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/traits.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     use chan;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/fn_runner.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use chan;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `crossbeam` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crossbeam;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | extern crate crossbeam;
[INFO] [stdout]    | ----------------------- the item `crossbeam` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:52:28
[INFO] [stdout]    |
[INFO] [stdout] 52 |             State::Init => try!(self.setup()),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |             try!(r.setup());
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]    --> src/composer.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     use chan;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:46:1
[INFO] [stdout]     |
[INFO] [stdout] 46  | extern crate chan;
[INFO] [stdout]     | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]    --> src/process.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     use chan;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:46:1
[INFO] [stdout]     |
[INFO] [stdout] 46  | extern crate chan;
[INFO] [stdout]     | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/test_helpers.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:65:27
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<Error + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<dyn Error + Send>;
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thunk.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<Invoke<A,R>+Send + '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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<dyn Invoke<A,R>+Send + 'a>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/composer.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<Runner + Send>> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<dyn Runner + Send>> {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:65:27
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<Error + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<dyn Error + Send>;
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thunk.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<Invoke<A,R>+Send + '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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<dyn Invoke<A,R>+Send + 'a>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/composer.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<Runner + Send>> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<dyn Runner + Send>> {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/process.rs:86:30
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<dyn Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<Runner + Send>,
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<dyn Runner + Send>,
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/process.rs:86:30
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<dyn Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<Runner + Send>,
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<dyn Runner + Send>,
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0593]: closure is expected to take 1 argument, but it takes 0 arguments
[INFO] [stdout]   --> src/composer.rs:72:23
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move || {
[INFO] [stdout]    |                       ^^^^^ ------- takes 0 arguments
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected closure that takes 1 argument
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the closure to take and ignore the expected argument
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move |_| {
[INFO] [stdout]    |                                  ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0593]: closure is expected to take 1 argument, but it takes 0 arguments
[INFO] [stdout]   --> src/composer.rs:72:23
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move || {
[INFO] [stdout]    |                       ^^^^^ ------- takes 0 arguments
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected closure that takes 1 argument
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the closure to take and ignore the expected argument
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move |_| {
[INFO] [stdout]    |                                  ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:149:71
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:150:63
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:173:71
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:174:63
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:197:63
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let runner1 = Box::new(TestRunner::new(1, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let runner1 = Box::new(TestRunner::new(1, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:200:20
[INFO] [stdout]     |
[INFO] [stdout] 200 |         })) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 200 |         })) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process.rs:51:19
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 e.description()
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:216:71
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:217:63
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process.rs:51:19
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 e.description()
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:171:62
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:195:62
[INFO] [stdout]     |
[INFO] [stdout] 195 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 195 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0593`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0593`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `marid` (lib) due to 2 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `marid` (lib test) due to 2 previous errors; 25 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "649838efa73ccb449fbb7f2a0e7762ceea3275c88784758ccdb4e24f8389f2f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "649838efa73ccb449fbb7f2a0e7762ceea3275c88784758ccdb4e24f8389f2f9", kill_on_drop: false }`
[INFO] [stdout] 649838efa73ccb449fbb7f2a0e7762ceea3275c88784758ccdb4e24f8389f2f9
[INFO] checking marid-0.1.0 against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] extracting crate marid 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate marid 0.1.0 on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate marid 0.1.0
[INFO] finished tweaking crates.io crate marid 0.1.0
[INFO] tweaked toml for crates.io crate marid 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86a93defd9490db8023a68c51198bf936e06a90c92693d13d9c3ee1640195b97
[INFO] running `Command { std: "docker" "start" "-a" "86a93defd9490db8023a68c51198bf936e06a90c92693d13d9c3ee1640195b97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86a93defd9490db8023a68c51198bf936e06a90c92693d13d9c3ee1640195b97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86a93defd9490db8023a68c51198bf936e06a90c92693d13d9c3ee1640195b97", kill_on_drop: false }`
[INFO] [stdout] 86a93defd9490db8023a68c51198bf936e06a90c92693d13d9c3ee1640195b97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e59e20a183bbbf9a3b5512e3b068c5d4329c0cf0a29b919b2549da3359b819e
[INFO] running `Command { std: "docker" "start" "-a" "9e59e20a183bbbf9a3b5512e3b068c5d4329c0cf0a29b919b2549da3359b819e", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking chan v0.1.23
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking chan-signal v0.3.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking marid v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `crossbeam` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crossbeam;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | extern crate crossbeam;
[INFO] [stdout]    | ----------------------- the item `crossbeam` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:52:28
[INFO] [stdout]    |
[INFO] [stdout] 52 |             State::Init => try!(self.setup()),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |             try!(r.setup());
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/test_helpers.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/traits.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     use chan;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/fn_runner.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use chan;
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `crossbeam` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crossbeam;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:48:1
[INFO] [stdout]    |
[INFO] [stdout] 48 | extern crate crossbeam;
[INFO] [stdout]    | ----------------------- the item `crossbeam` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/composer.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:52:28
[INFO] [stdout]    |
[INFO] [stdout] 52 |             State::Init => try!(self.setup()),
[INFO] [stdout]    |                            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/composer.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |             try!(r.setup());
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]    --> src/composer.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     use chan;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:46:1
[INFO] [stdout]     |
[INFO] [stdout] 46  | extern crate chan;
[INFO] [stdout]     | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]    --> src/process.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     use chan;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:46:1
[INFO] [stdout]     |
[INFO] [stdout] 46  | extern crate chan;
[INFO] [stdout]     | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `chan` is imported redundantly
[INFO] [stdout]   --> src/test_helpers.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | use chan;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern crate chan;
[INFO] [stdout]    | ------------------ the item `chan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:65:27
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<Error + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<dyn Error + Send>;
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thunk.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<Invoke<A,R>+Send + '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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<dyn Invoke<A,R>+Send + 'a>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/composer.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<Runner + Send>> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<dyn Runner + Send>> {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:65:27
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<Error + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub type MaridError = Box<dyn Error + Send>;
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/thunk.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<Invoke<A,R>+Send + '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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     invoke: Box<dyn Invoke<A,R>+Send + 'a>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/composer.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<Runner + Send>> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Runner for Composer<Box<dyn Runner + Send>> {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/process.rs:86:30
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<dyn Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<Runner + Send>,
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<dyn Runner + Send>,
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/process.rs:86:30
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn start(runner: Box<dyn Runner + Send>, signaler: Sender<Signal>, recv: Receiver<Signal>) -> MaridProcess {
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:102:41
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<Runner + Send>,
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn spawn_run_thread(mut runner: Box<dyn Runner + Send>,
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0593]: closure is expected to take 1 argument, but it takes 0 arguments
[INFO] [stdout]   --> src/composer.rs:72:23
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move || {
[INFO] [stdout]    |                       ^^^^^ ------- takes 0 arguments
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected closure that takes 1 argument
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the closure to take and ignore the expected argument
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move |_| {
[INFO] [stdout]    |                                  ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process.rs:51:19
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 e.description()
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0593]: closure is expected to take 1 argument, but it takes 0 arguments
[INFO] [stdout]   --> src/composer.rs:72:23
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move || {
[INFO] [stdout]    |                       ^^^^^ ------- takes 0 arguments
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected closure that takes 1 argument
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the closure to take and ignore the expected argument
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 scope.spawn(move |_| {
[INFO] [stdout]    |                                  ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:149:71
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:150:63
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:173:71
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 173 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:174:63
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:197:63
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let runner1 = Box::new(TestRunner::new(1, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 197 |         let runner1 = Box::new(TestRunner::new(1, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:200:20
[INFO] [stdout]     |
[INFO] [stdout] 200 |         })) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 200 |         })) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:216:71
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let runner1 = Box::new(TestRunner::new(1, sn.clone())) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/composer.rs:217:63
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let runner2 = Box::new(TestRunner::new(2, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/process.rs:51:19
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 e.description()
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:171:62
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 171 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0593`.
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/process.rs:195:62
[INFO] [stdout]     |
[INFO] [stdout] 195 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<Runner + Send>;
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 195 |         let runner = Box::new(TestRunner::new(0, sn)) as Box<dyn Runner + Send>;
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `marid` (lib) due to 2 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error; 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0593`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `marid` (lib test) due to 2 previous errors; 25 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9e59e20a183bbbf9a3b5512e3b068c5d4329c0cf0a29b919b2549da3359b819e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e59e20a183bbbf9a3b5512e3b068c5d4329c0cf0a29b919b2549da3359b819e", kill_on_drop: false }`
[INFO] [stdout] 9e59e20a183bbbf9a3b5512e3b068c5d4329c0cf0a29b919b2549da3359b819e
