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rustc future incompat warning: overflow evaluating the requirement ... #26199
Description
Bevy version and features
- The release number or commit hash of the version you're using: 8550394
- If you're not using default features, the combination of bevy's cargo features you are using.
[Optional] Relevant system information
If you cannot get Bevy to build or run on your machine, please include:
- the Rust version you're using (you can get this by running
cargo --version)
rustc 1.101.0-nightly (080cc2714 2026-10-11)
binary: rustc
commit-hash: 080cc27146389dbb5c8772c476b1937be9c6110f
commit-date: 2026-10-11
host: x86_64-unknown-linux-gnu
release: 1.101.0-nightly
LLVM version: 23.1.3
What you did
Build an example with nightly.
What went wrong
I'm getting 3 future incompatibility lints regarding the next trait solver:
warning: overflow evaluating the requirement `bevy_ecs::system::Local<'_, std::vec::Vec<bevy_render::render_resource::BindGroupEntry<'_>>> well-formed`
--> crates/bevy_pbr/src/render/mesh_view_bindings.rs:708:24
|
708 | mut entries_cache: bevy_ecs::system::Local<Vec<BindGroupEntry>>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: which requires `std::vec::Vec<bevy_render::render_resource::BindGroupEntry<'_>>: Send`
= note: which requires `alloc::raw_vec::RawVec<bevy_render::render_resource::BindGroupEntry<'_>>: Send`
= note: which requires `PhantomData<bevy_render::render_resource::BindGroupEntry<'_>>: Send`
= note: which requires `bevy_render::render_resource::BindGroupEntry<'_>: Send`
= note: which requires `bevy_render::render_resource::BindingResource<'_>: Send`
= note: which requires `&wgpu::api::external_texture::ExternalTexture: Send`
= note: which requires `wgpu::api::external_texture::ExternalTexture: Sync`
= note: which requires `wgpu::dispatch::DispatchExternalTexture: Sync`
= note: which requires `Arc<wgpu::backend::wgpu_core::CoreExternalTexture>: Sync`
= note: which requires `wgpu::backend::wgpu_core::CoreExternalTexture: Send`
= note: which requires `wgpu::backend::wgpu_core::ContextWgpuCore: Send`
= note: which requires `Arc<wgpu_core::global::Global>: Send`
= note: which requires `wgpu_core::global::Global: Send`
= note: which requires `wgpu_core::hub::Hub: Send`
= note: which requires `wgpu_core::registry::Registry<Arc<lock_api::mutex::Mutex<parking_lot::raw_mutex::RawMutex, wgpu_core::command::compute::ComputePass>>>: Send`
= note: and so on...
= help: consider adding a manual `impl` of auto traits like `Send` for intermediate types, if auto traits are involved
= help: or consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`bevy_pbr`)
= note: this lint is attached to the whole crate and can't be disabled on a per-function basis
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #159228 <https://github.com/rust-lang/rust/issues/159228>
= note: `#[warn(recursion_depth_exceeding_limit)]` (part of `#[warn(future_incompatible)]`) on by default
and two other similar warnings.
Additional information
The next trait solver is currently in FCP: rust-lang/rust#164209 Once it becomes the default this will become a hard error.
Activity
SkiFire13 commentedon Oct 16, 2026
Related: #25511
The proper long term solution is to fix
wgpu'sSendandSyncchains. They already got two PRs for this in, but they haven't released a new patch/minor bump to include them.