[INFO] fetching crate synchrotron 0.1.0...
[INFO] testing synchrotron-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate synchrotron 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate synchrotron 0.1.0
[INFO] finished tweaking crates.io crate synchrotron 0.1.0
[INFO] tweaked toml for crates.io crate synchrotron 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate synchrotron 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 61 packages to latest compatible versions
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.32)
[INFO] [stderr]       Adding vec-arena v0.1.1 (available: v1.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9925757546ff033011d33b3b457038700f32b84a9ad20dffc61c24e59b6021d2
[INFO] running `Command { std: "docker" "start" "-a" "9925757546ff033011d33b3b457038700f32b84a9ad20dffc61c24e59b6021d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9925757546ff033011d33b3b457038700f32b84a9ad20dffc61c24e59b6021d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9925757546ff033011d33b3b457038700f32b84a9ad20dffc61c24e59b6021d2", kill_on_drop: false }`
[INFO] [stdout] 9925757546ff033011d33b3b457038700f32b84a9ad20dffc61c24e59b6021d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22443a6cc34ddd242c23279a03d97e61b3598e5178422292bec2dda62f26e7ed
[INFO] running `Command { std: "docker" "start" "-a" "22443a6cc34ddd242c23279a03d97e61b3598e5178422292bec2dda62f26e7ed", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling vec-arena v0.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling index_queue v0.1.0
[INFO] [stderr]    Compiling synchrotron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:15:38
[INFO] [stdout]    |
[INFO] [stdout] 15 | use futures::executor::{self, Spawn, Unpark};
[INFO] [stdout]    |                                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:94:6
[INFO] [stdout]    |
[INFO] [stdout] 94 | impl Unpark for Ticket {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stdout]    --> src/lib.rs:177:15
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:116:35
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<Future<Item=(), Error=Void> + '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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<dyn Future<Item=(), Error=Void> + 'a>>;
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Unpark::unpark`: recommended to use `Notify` instead
[INFO] [stdout]    --> src/lib.rs:130:16
[INFO] [stdout]     |
[INFO] [stdout] 130 |         ticket.unpark();
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stdout]    --> src/lib.rs:177:22
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:291:47
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let poll = main.spawn.poll_future(ticket);
[INFO] [stdout]     |                                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:304:46
[INFO] [stdout]     |
[INFO] [stdout] 304 |                     let poll = spawned.spawn.poll_future(ticket);
[INFO] [stdout]     |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.57s
[INFO] running `Command { std: "docker" "inspect" "22443a6cc34ddd242c23279a03d97e61b3598e5178422292bec2dda62f26e7ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22443a6cc34ddd242c23279a03d97e61b3598e5178422292bec2dda62f26e7ed", kill_on_drop: false }`
[INFO] [stdout] 22443a6cc34ddd242c23279a03d97e61b3598e5178422292bec2dda62f26e7ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4cedba8c928b68a7db1d460daa6b750296b0a73a69a0be4f5fb3a59d48b54429
[INFO] running `Command { std: "docker" "start" "-a" "4cedba8c928b68a7db1d460daa6b750296b0a73a69a0be4f5fb3a59d48b54429", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling net2 v0.2.39
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:15:38
[INFO] [stdout]    |
[INFO] [stdout] 15 | use futures::executor::{self, Spawn, Unpark};
[INFO] [stdout]    |                                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:94:6
[INFO] [stdout]    |
[INFO] [stdout] 94 | impl Unpark for Ticket {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stdout]    --> src/lib.rs:177:15
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:116:35
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<Future<Item=(), Error=Void> + '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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<dyn Future<Item=(), Error=Void> + 'a>>;
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Unpark::unpark`: recommended to use `Notify` instead
[INFO] [stdout]    --> src/lib.rs:130:16
[INFO] [stdout]     |
[INFO] [stdout] 130 |         ticket.unpark();
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stdout]    --> src/lib.rs:177:22
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:291:47
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let poll = main.spawn.poll_future(ticket);
[INFO] [stdout]     |                                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:304:46
[INFO] [stdout]     |
[INFO] [stdout] 304 |                     let poll = spawned.spawn.poll_future(ticket);
[INFO] [stdout]     |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.18
[INFO] [stderr]    Compiling synchrotron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]  --> tests/simple.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures::{future, task, Async, BoxFuture, Future};
[INFO] [stdout]   |                                    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]   --> tests/simple.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |         -> BoxFuture<(), Void> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]   --> tests/simple.rs:33:42
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn receive(inbox: &Arc<Mutex<Inbox>>) -> BoxFuture<&'static str, Void> {
[INFO] [stdout]    |                                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stdout]   --> tests/simple.rs:43:42
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 inbox.waiting.push(task::park());
[INFO] [stdout]    |                                          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stdout]   --> tests/simple.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |             task.unpark();
[INFO] [stdout]    |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]   --> tests/simple.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |     future::ok(()).boxed()
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stdout]   --> tests/simple.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     }).boxed()
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:15:38
[INFO] [stdout]    |
[INFO] [stdout] 15 | use futures::executor::{self, Spawn, Unpark};
[INFO] [stdout]    |                                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stdout]   --> src/lib.rs:94:6
[INFO] [stdout]    |
[INFO] [stdout] 94 | impl Unpark for Ticket {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stdout]    --> src/lib.rs:177:15
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:116:35
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<Future<Item=(), Error=Void> + '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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 | type SpawnedBox<'a> = Spawned<Box<dyn Future<Item=(), Error=Void> + 'a>>;
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Unpark::unpark`: recommended to use `Notify` instead
[INFO] [stdout]    --> src/lib.rs:130:16
[INFO] [stdout]     |
[INFO] [stdout] 130 |         ticket.unpark();
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stdout]    --> src/lib.rs:177:22
[INFO] [stdout]     |
[INFO] [stdout] 177 |         task::park().unpark();
[INFO] [stdout]     |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:291:47
[INFO] [stdout]     |
[INFO] [stdout] 291 |                         let poll = main.spawn.poll_future(ticket);
[INFO] [stdout]     |                                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stdout]    --> src/lib.rs:304:46
[INFO] [stdout]     |
[INFO] [stdout] 304 |                     let poll = spawned.spawn.poll_future(ticket);
[INFO] [stdout]     |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.19s
[INFO] running `Command { std: "docker" "inspect" "4cedba8c928b68a7db1d460daa6b750296b0a73a69a0be4f5fb3a59d48b54429", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cedba8c928b68a7db1d460daa6b750296b0a73a69a0be4f5fb3a59d48b54429", kill_on_drop: false }`
[INFO] [stdout] 4cedba8c928b68a7db1d460daa6b750296b0a73a69a0be4f5fb3a59d48b54429
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7f8c91bbeeac27cea9197d21df36d09ff3f2d9f342bc55cba06aea48affc5c93
[INFO] running `Command { std: "docker" "start" "-a" "7f8c91bbeeac27cea9197d21df36d09ff3f2d9f342bc55cba06aea48affc5c93", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stderr]   --> src/lib.rs:15:38
[INFO] [stderr]    |
[INFO] [stderr] 15 | use futures::executor::{self, Spawn, Unpark};
[INFO] [stderr]    |                                      ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated trait `futures::task::Unpark`: recommended to use `Notify` instead
[INFO] [stderr]   --> src/lib.rs:94:6
[INFO] [stderr]    |
[INFO] [stderr] 94 | impl Unpark for Ticket {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stderr]    --> src/lib.rs:177:15
[INFO] [stderr]     |
[INFO] [stderr] 177 |         task::park().unpark();
[INFO] [stderr]     |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:116:35
[INFO] [stderr]     |
[INFO] [stderr] 116 | type SpawnedBox<'a> = Spawned<Box<Future<Item=(), Error=Void> + 'a>>;
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 116 | type SpawnedBox<'a> = Spawned<Box<dyn Future<Item=(), Error=Void> + 'a>>;
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::task::Unpark::unpark`: recommended to use `Notify` instead
[INFO] [stderr]    --> src/lib.rs:130:16
[INFO] [stderr]     |
[INFO] [stderr] 130 |         ticket.unpark();
[INFO] [stderr]     |                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stderr]    --> src/lib.rs:177:22
[INFO] [stderr]     |
[INFO] [stderr] 177 |         task::park().unpark();
[INFO] [stderr]     |                      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stderr]    --> src/lib.rs:291:47
[INFO] [stderr]     |
[INFO] [stderr] 291 |                         let poll = main.spawn.poll_future(ticket);
[INFO] [stderr]     |                                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::task_impl::std::<impl futures::task::Spawn<F>>::poll_future`: recommended to use `poll_future_notify` instead
[INFO] [stderr]    --> src/lib.rs:304:46
[INFO] [stderr]     |
[INFO] [stderr] 304 |                     let poll = spawned.spawn.poll_future(ticket);
[INFO] [stderr]     |                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `synchrotron` (lib) generated 8 warnings (run `cargo fix --lib -p synchrotron` to apply 1 suggestion)
[INFO] [stderr] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]  --> tests/simple.rs:8:36
[INFO] [stderr]   |
[INFO] [stderr] 8 | use futures::{future, task, Async, BoxFuture, Future};
[INFO] [stderr]   |                                    ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> tests/simple.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |         -> BoxFuture<(), Void> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated type alias `futures::BoxFuture`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> tests/simple.rs:33:42
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn receive(inbox: &Arc<Mutex<Inbox>>) -> BoxFuture<&'static str, Void> {
[INFO] [stderr]    |                                          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `futures::task::park`: renamed to `current`
[INFO] [stderr]   --> tests/simple.rs:43:42
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 inbox.waiting.push(task::park());
[INFO] [stderr]    |                                          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::task::Task::unpark`: renamed to `notify`
[INFO] [stderr]   --> tests/simple.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |             task.unpark();
[INFO] [stderr]    |                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> tests/simple.rs:30:20
[INFO] [stderr]    |
[INFO] [stderr] 30 |     future::ok(()).boxed()
[INFO] [stderr]    |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `futures::Future::boxed`: removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> tests/simple.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     }).boxed()
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `synchrotron` (test "simple") generated 7 warnings
[INFO] [stderr] warning: `synchrotron` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/synchrotron-c1a5fa69d25231a4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/simple.rs (/opt/rustwide/target/debug/deps/simple-4b58cb26ece8ce77)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test main ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.43s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests synchrotron
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7f8c91bbeeac27cea9197d21df36d09ff3f2d9f342bc55cba06aea48affc5c93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f8c91bbeeac27cea9197d21df36d09ff3f2d9f342bc55cba06aea48affc5c93", kill_on_drop: false }`
[INFO] [stdout] 7f8c91bbeeac27cea9197d21df36d09ff3f2d9f342bc55cba06aea48affc5c93
