bevyengine/bevy · critical

You can't use `get_binding` with a `ShaderBuffer`; fetch the

Error message

You can't use `get_binding` with a `ShaderBuffer`; fetch the buffer from the `RenderAssets<GpuShaderBuffer>` instead

What it means

OwnedBindingResource::get_binding() (bind_group.rs:825) panics on the ShaderBuffer variant because a ShaderBuffer only holds CPU-side data plus identity - its GPU buffer exists only after preparation, inside the RenderAssets<GpuShaderBuffer> collection. The message tells you to fetch the real buffer from that resource instead of trying to convert the ShaderBuffer directly into a BindingResource.

Source

Thrown at crates/bevy_render/src/render_resource/bind_group.rs:825

/// Data that will be copied into a GPU buffer.
///
/// This corresponds to the `#[data]` attribute in `AsBindGroup`.
#[derive(Debug, Deref, DerefMut)]
pub struct OwnedData(pub Vec<u8>);

impl OwnedBindingResource {
    /// Creates a [`BindingResource`] reference to this
    /// [`OwnedBindingResource`].
    ///
    /// Note that this operation panics if passed a
    /// [`OwnedBindingResource::Data`], because [`OwnedData`] doesn't itself
    /// correspond to any binding and instead requires the
    /// `MaterialBindGroupAllocator` to pack it into a buffer.
    pub fn get_binding(&self) -> BindingResource<'_> {
        match self {
            OwnedBindingResource::Buffer(buffer) => buffer.as_entire_binding(),
            OwnedBindingResource::ShaderBuffer(_) => {
                panic!(
                    "You can't use `get_binding` with a `ShaderBuffer`; fetch the buffer from \
                     the `RenderAssets<GpuShaderBuffer>` instead"
                )
            }
            OwnedBindingResource::TextureView(_, view) => BindingResource::TextureView(view),
            OwnedBindingResource::Sampler(_, sampler) => BindingResource::Sampler(sampler),
            OwnedBindingResource::Data(_) => panic!("`OwnedData` has no binding resource"),
        }
    }
}

impl UnpreparedBindingResource {
    /// Creates a [`BindingResource`] reference to this
    /// [`UnpreparedBindingResource`].
    ///
    /// Note that this operation panics if passed a
    /// [`UnpreparedBindingResource::Data`], because the range doesn't itself
    /// correspond to any binding and instead requires the

View on GitHub (pinned to 396ca72708)

Solutions

1. Match the variant: for ShaderBuffer, look the GPU buffer up in RenderAssets<GpuShaderBuffer> by its id and bind gpu.buffer via BufferBinding.
2. Restructure code so get_binding() is only called on variants that have a direct binding (Buffer, TextureView, Sampler).
3. Reuse the engine's material preparation, which already routes ShaderBuffer correctly.

Example fix

// before
let binding = owned_resource.get_binding(); // panics on ShaderBuffer variant

// after
let binding = match &owned_resource {
    OwnedBindingResource::ShaderBuffer(buffer) => {
        let gpu = gpu_shader_buffers.get(buffer.id()).expect("GpuShaderBuffer prepared");
        BindingResource::Buffer(BufferBinding { buffer: &gpu.buffer, offset: 0, size: None })
    }
    other => other.get_binding(),
};

fn has_direct_binding(res: &OwnedBindingResource) -> bool {
    !matches!(
        res,
        OwnedBindingResource::ShaderBuffer(_) | OwnedBindingResource::Data(_)
    )
}

When it happens

Trigger: Calling get_binding() (directly or from generic code iterating OwnedBindingResource values) on a value that is OwnedBindingResource::ShaderBuffer - typical in custom AsBindGroup implementations or hand-built bind groups.

Common situations: Custom material/bind-group code that treats all owned binding resources uniformly; migrating buffer-based bindings to ShaderBuffer; bindless or slotted material paths where shader buffers are packed elsewhere.

Related errors

• `OwnedData` has no binding resource
• Data ranges have no binding resource
• Failed to get buffer
• Failed to get buffer
• Cannot call `ReflectComponent::reflect_mut` on component {na

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/33a39985d0212aee. Report an issue: GitHub.