chore: release v0.30.0

[github-actions]

🤖 New release

• timely_bytes: 0.29.0 -> 0.30.0 (✓ API compatible changes)
• timely_container: 0.29.0 -> 0.30.0
• timely_logging: 0.29.0 -> 0.30.0 (✓ API compatible changes)
• timely_communication: 0.29.0 -> 0.30.0 (⚠ API breaking changes)
• timely: 0.29.0 -> 0.30.0 (⚠ API breaking changes)

⚠ timely_communication breaking changes

--- failure auto_trait_impl_removed: auto trait no longer implemented ---

Description:
A public type has stopped implementing one or more auto traits. This can break downstream code that depends on the traits being implemented.
        ref: https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/auto_trait_impl_removed.ron

Failed in:
  type MergeQueue is no longer Sync, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/bytes_exchange.rs:33
  type MergeQueue is no longer UnwindSafe, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/bytes_exchange.rs:33
  type MergeQueue is no longer RefUnwindSafe, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/bytes_exchange.rs:33

--- failure derive_trait_impl_removed: built-in derived trait no longer implemented ---

Description:
A public type has stopped deriving one or more traits. This can break downstream code that depends on those types implementing those traits.
        ref: https://doc.rust-lang.org/reference/attributes/derive.html#derive
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/derive_trait_impl_removed.ron

Failed in:
  type MergeQueue no longer derives Clone, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/bytes_exchange.rs:33

--- failure enum_struct_variant_field_missing: pub enum struct variant's field removed or renamed ---

Description:
A publicly-visible enum has a struct variant whose field is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/enum_struct_variant_field_missing.ron

Failed in:
  field log_fn of variant Config::Cluster, previously in file /tmp/.tmpjfLHp1/timely_communication/src/initialize.rs:42
  field log_fn of variant Config::Cluster, previously in file /tmp/.tmpjfLHp1/timely_communication/src/initialize.rs:42

--- failure function_parameter_count_changed: pub fn parameter count changed ---

Description:
A publicly-visible function now takes a different number of parameters.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/function_parameter_count_changed.ron

Failed in:
  timely_communication::allocator::zero_copy::initialize::initialize_networking_from_sockets now takes 5 parameters instead of 6, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/initialize.rs:62
  timely_communication::allocator::zero_copy::initialize::initialize_networking now takes 6 parameters instead of 7, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/initialize.rs:41
  timely_communication::allocator::zero_copy::tcp::send_loop now takes 6 parameters instead of 5, in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/zero_copy/tcp.rs:137

--- failure method_parameter_count_changed: pub method parameter count changed ---

Description:
A publicly-visible method now takes a different number of parameters, not counting the receiver (self) parameter.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/method_parameter_count_changed.ron

Failed in:
  timely_communication::allocator::ProcessBuilder::new_typed_vector takes 2 parameters in /tmp/.tmpjfLHp1/timely_communication/src/allocator/mod.rs:149, but now takes 3 parameters in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/mod.rs:155
  timely_communication::allocator::ProcessBuilder::new_bytes_vector takes 2 parameters in /tmp/.tmpjfLHp1/timely_communication/src/allocator/mod.rs:157, but now takes 3 parameters in /tmp/.tmpeEpjMp/timely-dataflow/communication/src/allocator/mod.rs:163

⚠ timely breaking changes

--- failure trait_allows_fewer_generic_type_params: trait now allows fewer generic type parameters ---

Description:
A trait now allows fewer generic type parameters than it used to. Uses of this trait that supplied all previously-supported generic types will be broken.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-parameter-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/trait_allows_fewer_generic_type_params.ron

Failed in:
  trait ToStreamBuilder allows 1 -> 0 generic types in /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:10
  trait ToStreamBuilder allows 1 -> 0 generic types in /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:10

--- failure trait_associated_type_added: non-sealed public trait added associated type without default value ---

Description:
A non-sealed trait has gained an associated type without a default value, which breaks downstream implementations of the trait
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-item-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/trait_associated_type_added.ron

Failed in:
  trait associated type timely::dataflow::operators::core::to_stream::ToStreamBuilder::Item in file /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:12
  trait associated type timely::dataflow::operators::core::ToStreamBuilder::Item in file /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:12

--- failure trait_method_requires_different_generic_type_params: trait method now requires a different number of generic type parameters ---

Description:
A trait method now requires a different number of generic type parameters than it used to. Calls or implementations of this trait method using the previous number of generic types will be broken.
        ref: https://doc.rust-lang.org/reference/items/generics.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/trait_method_requires_different_generic_type_params.ron

Failed in:
  ToStreamBuilder::to_stream_with_builder (1 -> 2 generic types) in /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:35
  ToStreamBuilder::to_stream_with_builder (1 -> 2 generic types) in /tmp/.tmpeEpjMp/timely-dataflow/timely/src/dataflow/operators/core/to_stream.rs:35

Changelog

timely

0.30.0 - 2026-05-29

Other

• Correct soundness hole, add Sync bound (#800)
• Move ToStreamBuilder's container builder to method generic (#792)
• hoist rebuild check out of update_iter (#797)
• Benchmark spill machinery (#791)

Breaking changes

• ToStreamBuilder exposes the item type via the Item associated type instead of a trait-level generic, and the container builder moves to a method-level generic. This enables method-call syntax: (0..3).to_stream_with_builder::<_, CapacityContainerBuilder<_>>(scope) instead of the UFCS form ToStreamBuilder::<CapacityContainerBuilder<_>>::to_stream_with_builder(0..3, scope).

Bytes is now Sync, and byte buffers must be Send

timely_bytes::arc::Bytes now implements Sync in addition to Send. To make both impls sound, BytesMut::from now requires its payload to be Send. This is a breaking change to timely_communication: BytesRefill::logic now produces Box<dyn DerefMut<Target=[u8]> + Send> rather than Box<dyn DerefMut<Target=[u8]>>. Custom refills whose buffer type wraps a raw pointer (e.g. NonNull) must assert unsafe impl Send on that type.

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This PR was generated with release-plz.