[INFO] fetching crate gj 0.2.0...
[INFO] checking gj-0.2.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate gj 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate gj 0.2.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gj 0.2.0
[INFO] finished tweaking crates.io crate gj 0.2.0
[INFO] tweaked toml for crates.io crate gj 0.2.0 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 298baab3177791746ee59f9526a0704a117617ae0e91ed4f44889f8583a5c73b
[INFO] running `Command { std: "docker" "start" "-a" "298baab3177791746ee59f9526a0704a117617ae0e91ed4f44889f8583a5c73b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "298baab3177791746ee59f9526a0704a117617ae0e91ed4f44889f8583a5c73b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298baab3177791746ee59f9526a0704a117617ae0e91ed4f44889f8583a5c73b", kill_on_drop: false }`
[INFO] [stdout] 298baab3177791746ee59f9526a0704a117617ae0e91ed4f44889f8583a5c73b
[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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5770c604f690693a78a5d12808ef96e9f9e2fa3952b64c77ec86a78c7eb7b885
[INFO] running `Command { std: "docker" "start" "-a" "5770c604f690693a78a5d12808ef96e9f9e2fa3952b64c77ec86a78c7eb7b885", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking gj v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:220:21
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     try!(event_source.wait());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/promise_node.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |     dependency: Box<PromiseNode<DepT, E>>,
[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] 35 |     dependency: Box<dyn PromiseNode<DepT, E>>,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:101:15
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Step1(Box<PromiseNode<Promise<T, E>, E>>, Option<GuardedEventHandle>, Option<Weak<RefCell<ChainState<T, E>>>>),
[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] 101 |     Step1(Box<dyn PromiseNode<Promise<T, E>, E>>, Option<GuardedEventHandle>, Option<Weak<RefCell<ChainState<T, E>>>>),
[INFO] [stdout]     |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:102:15
[INFO] [stdout]     |
[INFO] [stdout] 102 |     Step2(Box<PromiseNode<T, E>>, Option<Weak<RefCell<ChainState<T, E>>>>),
[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 |     Step2(Box<dyn PromiseNode<T, E>>, Option<Weak<RefCell<ChainState<T, E>>>>),
[INFO] [stdout]     |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:273:17
[INFO] [stdout]     |
[INFO] [stdout] 273 |     Waiting(Box<PromiseNode<T, E>>, EventDropper),
[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] 273 |     Waiting(Box<dyn PromiseNode<T, E>>, EventDropper),
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:377:23
[INFO] [stdout]     |
[INFO] [stdout] 377 |     left: Option<(Box<PromiseNode<T, E>>, EventDropper)>,
[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] 377 |     left: Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>,
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:378:24
[INFO] [stdout]     |
[INFO] [stdout] 378 |     right: Option<(Box<PromiseNode<T, E>>, EventDropper)>,
[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] 378 |     right: Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:438:17
[INFO] [stdout]     |
[INFO] [stdout] 438 |     Waiting(Box<PromiseNode<T, E>>),
[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] 438 |     Waiting(Box<dyn PromiseNode<T, E>>),
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:121:27
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub event: Option<Box<Event>>,
[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] 121 |     pub event: Option<Box<dyn Event>>,
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:281:28
[INFO] [stdout]     |
[INFO] [stdout] 281 |     reaper: Rc<RefCell<Box<TaskReaper<T, E>>>>,
[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] 281 |     reaper: Rc<RefCell<Box<dyn TaskReaper<T, E>>>>,
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:308:35
[INFO] [stdout]     |
[INFO] [stdout] 308 |     weak_reaper: Weak<RefCell<Box<TaskReaper<T, E>>>>,
[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] 308 |     weak_reaper: Weak<RefCell<Box<dyn TaskReaper<T, E>>>>,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:310:22
[INFO] [stdout]     |
[INFO] [stdout] 310 |     node: Option<Box<PromiseNode<T, E>>>,
[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] 310 |     node: Option<Box<dyn PromiseNode<T, E>>>,
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:80:15
[INFO] [stdout]    |
[INFO] [stdout] 80 |     node: Box<PromiseNode<T, E>>,
[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] 80 |     node: Box<dyn PromiseNode<T, E>>,
[INFO] [stdout]    |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/promise_node.rs:42:32
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn new(dependency: Box<PromiseNode<DepT, E>>, func: Func) -> Transform<T, E, E1, DepT, Func> {
[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] 42 |     pub fn new(dependency: Box<dyn PromiseNode<DepT, E>>, func: Func) -> Transform<T, E, E1, DepT, Func> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:176:31
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub fn new(mut inner: Box<PromiseNode<Promise<T, E>, E>>) -> Chain<T, E> {
[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] 176 |     pub fn new(mut inner: Box<dyn PromiseNode<Promise<T, E>, E>>) -> Chain<T, E> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:220:21
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     try!(event_source.wait());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:386:30
[INFO] [stdout]     |
[INFO] [stdout] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[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] 386 |     pub fn new(mut left: Box<dyn PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:386:65
[INFO] [stdout]     |
[INFO] [stdout] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[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] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<dyn PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:453:31
[INFO] [stdout]     |
[INFO] [stdout] 453 |     pub fn new(mut inner: Box<PromiseNode<T, E>>) -> ForkHub<T, E> {
[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] 453 |     pub fn new(mut inner: Box<dyn PromiseNode<T, E>>) -> ForkHub<T, E> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:286:28
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn new(reaper: Box<TaskReaper<T, E>>) -> TaskSetImpl<T, E> {
[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] 286 |     pub fn new(reaper: Box<dyn TaskReaper<T, E>>) -> TaskSetImpl<T, E> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:293:39
[INFO] [stdout]     |
[INFO] [stdout] 293 |       pub fn add(&self, mut node: Box<PromiseNode<T, E>>) {
[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] 293 |       pub fn add(&self, mut node: Box<dyn PromiseNode<T, E>>) {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:204:74
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn wait<E1>(mut self, wait_scope: &WaitScope, event_source: &mut EventPort<E1>) -> Result<T, E>
[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] 204 |     pub fn wait<E1>(mut self, wait_scope: &WaitScope, event_source: &mut dyn EventPort<E1>) -> Result<T, E>
[INFO] [stdout]     |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:467:28
[INFO] [stdout]     |
[INFO] [stdout] 467 |     pub fn new(reaper: Box<TaskReaper<T, E>>) -> TaskSet<T, E> {
[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] 467 |     pub fn new(reaper: Box<dyn TaskReaper<T, E>>) -> TaskSet<T, E> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/promise_node.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |     dependency: Box<PromiseNode<DepT, E>>,
[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] 35 |     dependency: Box<dyn PromiseNode<DepT, E>>,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:101:15
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Step1(Box<PromiseNode<Promise<T, E>, E>>, Option<GuardedEventHandle>, Option<Weak<RefCell<ChainState<T, E>>>>),
[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] 101 |     Step1(Box<dyn PromiseNode<Promise<T, E>, E>>, Option<GuardedEventHandle>, Option<Weak<RefCell<ChainState<T, E>>>>),
[INFO] [stdout]     |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:102:15
[INFO] [stdout]     |
[INFO] [stdout] 102 |     Step2(Box<PromiseNode<T, E>>, Option<Weak<RefCell<ChainState<T, E>>>>),
[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 |     Step2(Box<dyn PromiseNode<T, E>>, Option<Weak<RefCell<ChainState<T, E>>>>),
[INFO] [stdout]     |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:273:17
[INFO] [stdout]     |
[INFO] [stdout] 273 |     Waiting(Box<PromiseNode<T, E>>, EventDropper),
[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] 273 |     Waiting(Box<dyn PromiseNode<T, E>>, EventDropper),
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:377:23
[INFO] [stdout]     |
[INFO] [stdout] 377 |     left: Option<(Box<PromiseNode<T, E>>, EventDropper)>,
[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] 377 |     left: Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>,
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:378:24
[INFO] [stdout]     |
[INFO] [stdout] 378 |     right: Option<(Box<PromiseNode<T, E>>, EventDropper)>,
[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] 378 |     right: Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:438:17
[INFO] [stdout]     |
[INFO] [stdout] 438 |     Waiting(Box<PromiseNode<T, E>>),
[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] 438 |     Waiting(Box<dyn PromiseNode<T, E>>),
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:121:27
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub event: Option<Box<Event>>,
[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] 121 |     pub event: Option<Box<dyn Event>>,
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:281:28
[INFO] [stdout]     |
[INFO] [stdout] 281 |     reaper: Rc<RefCell<Box<TaskReaper<T, E>>>>,
[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] 281 |     reaper: Rc<RefCell<Box<dyn TaskReaper<T, E>>>>,
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:308:35
[INFO] [stdout]     |
[INFO] [stdout] 308 |     weak_reaper: Weak<RefCell<Box<TaskReaper<T, E>>>>,
[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] 308 |     weak_reaper: Weak<RefCell<Box<dyn TaskReaper<T, E>>>>,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:310:22
[INFO] [stdout]     |
[INFO] [stdout] 310 |     node: Option<Box<PromiseNode<T, E>>>,
[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] 310 |     node: Option<Box<dyn PromiseNode<T, E>>>,
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:80:15
[INFO] [stdout]    |
[INFO] [stdout] 80 |     node: Box<PromiseNode<T, E>>,
[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] 80 |     node: Box<dyn PromiseNode<T, E>>,
[INFO] [stdout]    |               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/promise_node.rs:42:32
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn new(dependency: Box<PromiseNode<DepT, E>>, func: Func) -> Transform<T, E, E1, DepT, Func> {
[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] 42 |     pub fn new(dependency: Box<dyn PromiseNode<DepT, E>>, func: Func) -> Transform<T, E, E1, DepT, Func> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:176:31
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub fn new(mut inner: Box<PromiseNode<Promise<T, E>, E>>) -> Chain<T, E> {
[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] 176 |     pub fn new(mut inner: Box<dyn PromiseNode<Promise<T, E>, E>>) -> Chain<T, E> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:386:30
[INFO] [stdout]     |
[INFO] [stdout] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[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] 386 |     pub fn new(mut left: Box<dyn PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:386:65
[INFO] [stdout]     |
[INFO] [stdout] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[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] 386 |     pub fn new(mut left: Box<PromiseNode<T, E>>, mut right: Box<dyn PromiseNode<T, E>>) -> ExclusiveJoin<T, E> {
[INFO] [stdout]     |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:453:31
[INFO] [stdout]     |
[INFO] [stdout] 453 |     pub fn new(mut inner: Box<PromiseNode<T, E>>) -> ForkHub<T, E> {
[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] 453 |     pub fn new(mut inner: Box<dyn PromiseNode<T, E>>) -> ForkHub<T, E> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:286:28
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn new(reaper: Box<TaskReaper<T, E>>) -> TaskSetImpl<T, E> {
[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] 286 |     pub fn new(reaper: Box<dyn TaskReaper<T, E>>) -> TaskSetImpl<T, E> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/mod.rs:293:39
[INFO] [stdout]     |
[INFO] [stdout] 293 |       pub fn add(&self, mut node: Box<PromiseNode<T, E>>) {
[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] 293 |       pub fn add(&self, mut node: Box<dyn PromiseNode<T, E>>) {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:204:74
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn wait<E1>(mut self, wait_scope: &WaitScope, event_source: &mut EventPort<E1>) -> Result<T, E>
[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] 204 |     pub fn wait<E1>(mut self, wait_scope: &WaitScope, event_source: &mut dyn EventPort<E1>) -> Result<T, E>
[INFO] [stdout]     |                                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:467:28
[INFO] [stdout]     |
[INFO] [stdout] 467 |     pub fn new(reaper: Box<TaskReaper<T, E>>) -> TaskSet<T, E> {
[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] 467 |     pub fn new(reaper: Box<dyn TaskReaper<T, E>>) -> TaskSet<T, E> {
[INFO] [stdout]     |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/mod.rs:97:34
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn set(&self, event: Box<Event>) {
[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] 97 |     pub fn set(&self, event: Box<dyn Event>) {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/private/mod.rs:97:34
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn set(&self, event: Box<Event>) {
[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] 97 |     pub fn set(&self, event: Box<dyn Event>) {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:459:73
[INFO] [stdout]     |
[INFO] [stdout] 459 |         let event = Box::new(ForkEvent { state: state.clone() }) as Box<Event>;
[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] 459 |         let event = Box::new(ForkEvent { state: state.clone() }) as Box<dyn Event>;
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/private/promise_node.rs:459:73
[INFO] [stdout]     |
[INFO] [stdout] 459 |         let event = Box::new(ForkEvent { state: state.clone() }) as Box<Event>;
[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] 459 |         let event = Box::new(ForkEvent { state: state.clone() }) as Box<dyn Event>;
[INFO] [stdout]     |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]   --> src/lib.rs:54:29
[INFO] [stdout]    |
[INFO] [stdout] 54 | use private::{promise_node, Event, BoolEvent, PromiseAndFulfillerHub, PromiseAndFulfillerWrapper,
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Rc<RefCell<ChainState<T, E>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let state = ::std::mem::replace(&mut *self.state.borrow_mut(), ChainState::Step3);
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 139 |                 let self_state = self.state.clone(); // TODO better control flow
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `RefMut<'_, ChainState<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:216:16
[INFO] [stdout]     |
[INFO] [stdout] 215 |     fn set_self_pointer(&mut self, chain_state: Weak<RefCell<ChainState<T, E>>>) {
[INFO] [stdout]     |                                    ----------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 216 |         match *self.state.borrow_mut() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Vec<ArrayBranchStage<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:243:36
[INFO] [stdout]     |
[INFO] [stdout] 236 |         let strong_state = self.state.upgrade().expect("dangling pointer?");
[INFO] [stdout]     |             ------------ these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 237 |         let state = &mut *strong_state.borrow_mut();
[INFO] [stdout]     |                           ------------------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 238 |         let stage = ::std::mem::replace(&mut state.stage,
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 243 |             ArrayJoinStage::Active(mut branches) => {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]   --> src/lib.rs:54:29
[INFO] [stdout]    |
[INFO] [stdout] 54 | use private::{promise_node, Event, BoolEvent, PromiseAndFulfillerHub, PromiseAndFulfillerWrapper,
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Vec<T>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:338:21
[INFO] [stdout]     |
[INFO] [stdout] 329 |     fn get(self: Box<Self>) -> Result<Vec<T>, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 330 |         let stage = ::std::mem::replace(&mut self.state.borrow_mut().stage,
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 338 |                 let mut result = Vec::new();
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `(Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>, Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>)` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:422:15
[INFO] [stdout]     |
[INFO] [stdout] 418 |     fn get(self: Box<Self>) -> Result<T, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 422 |         match (left, right) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Rc<RefCell<ChainState<T, E>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let state = ::std::mem::replace(&mut *self.state.borrow_mut(), ChainState::Step3);
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 139 |                 let self_state = self.state.clone(); // TODO better control flow
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `RefMut<'_, ChainState<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:216:16
[INFO] [stdout]     |
[INFO] [stdout] 215 |     fn set_self_pointer(&mut self, chain_state: Weak<RefCell<ChainState<T, E>>>) {
[INFO] [stdout]     |                                    ----------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 216 |         match *self.state.borrow_mut() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Vec<ArrayBranchStage<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:243:36
[INFO] [stdout]     |
[INFO] [stdout] 236 |         let strong_state = self.state.upgrade().expect("dangling pointer?");
[INFO] [stdout]     |             ------------ these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 237 |         let state = &mut *strong_state.borrow_mut();
[INFO] [stdout]     |                           ------------------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 238 |         let stage = ::std::mem::replace(&mut state.stage,
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 243 |             ArrayJoinStage::Active(mut branches) => {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Option<Result<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/mod.rs:273:15
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn get(self: Box<Self>) -> Result<T, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 273 |         match ::std::mem::replace(&mut self.hub.borrow_mut().result, None) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Option<Rc<RefCell<HashMap<EventHandle, EventDropper>>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/mod.rs:337:30
[INFO] [stdout]     |
[INFO] [stdout] 316 |         let maybe_node = ::std::mem::replace(&mut self.node, None);
[INFO] [stdout]     |             ----------
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 337 |         if let Some(tasks) = self.weak_tasks.upgrade() {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Vec<T>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:338:21
[INFO] [stdout]     |
[INFO] [stdout] 329 |     fn get(self: Box<Self>) -> Result<Vec<T>, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 330 |         let stage = ::std::mem::replace(&mut self.state.borrow_mut().stage,
[INFO] [stdout]     |             -----
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 338 |                 let mut result = Vec::new();
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `(Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>, Option<(Box<dyn PromiseNode<T, E>>, EventDropper)>)` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/promise_node.rs:422:15
[INFO] [stdout]     |
[INFO] [stdout] 418 |     fn get(self: Box<Self>) -> Result<T, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 422 |         match (left, right) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Option<Result<T, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/mod.rs:273:15
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn get(self: Box<Self>) -> Result<T, E> {
[INFO] [stdout]     |            ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 273 |         match ::std::mem::replace(&mut self.hub.borrow_mut().result, None) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |         drop(wait_scope);
[INFO] [stdout]     |         ^^^^^----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&WaitScope`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 207 -         drop(wait_scope);
[INFO] [stdout] 207 +         let _ = wait_scope;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/private/promise_node.rs:157:29
[INFO] [stdout]     |
[INFO] [stdout] 157 | / ...                   ::std::mem::replace(&mut *strong_self_ptr.borrow_mut(),
[INFO] [stdout] 158 | | ...                                       ChainState::Step2(inner, None));
[INFO] [stdout]     | |_________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 157 |                             let _ = ::std::mem::replace(&mut *strong_self_ptr.borrow_mut(),
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Option<Rc<RefCell<HashMap<EventHandle, EventDropper>>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/private/mod.rs:337:30
[INFO] [stdout]     |
[INFO] [stdout] 316 |         let maybe_node = ::std::mem::replace(&mut self.node, None);
[INFO] [stdout]     |             ----------
[INFO] [stdout]     |             |
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout]     |             these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 337 |         if let Some(tasks) = self.weak_tasks.upgrade() {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gj` (lib) due to 8 previous errors; 27 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 |         drop(wait_scope);
[INFO] [stdout]     |         ^^^^^----------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&WaitScope`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 207 -         drop(wait_scope);
[INFO] [stdout] 207 +         let _ = wait_scope;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/private/promise_node.rs:157:29
[INFO] [stdout]     |
[INFO] [stdout] 157 | / ...                   ::std::mem::replace(&mut *strong_self_ptr.borrow_mut(),
[INFO] [stdout] 158 | | ...                                       ChainState::Step2(inner, None));
[INFO] [stdout]     | |_________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 157 |                             let _ = ::std::mem::replace(&mut *strong_self_ptr.borrow_mut(),
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gj` (lib test) due to 8 previous errors; 27 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5770c604f690693a78a5d12808ef96e9f9e2fa3952b64c77ec86a78c7eb7b885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5770c604f690693a78a5d12808ef96e9f9e2fa3952b64c77ec86a78c7eb7b885", kill_on_drop: false }`
[INFO] [stdout] 5770c604f690693a78a5d12808ef96e9f9e2fa3952b64c77ec86a78c7eb7b885