bevyengine/bevy · error

Data buffers should have a size

Error message

Data buffers should have a size

What it means

Panic in prepare_bind_groups' data-buffer upload path: no buffer descriptor matched the given bindless index when sizing data buffers. Every bindless index in the descriptor must have a matching buffer descriptor; mismatch indicates inconsistent bindless layout data.

Source

Thrown at crates/bevy_render/src/material_bind_groups.rs:2276

                BindlessResourceType::DataBuffer => {
                    // Copy the data in.
                    let buffer_descriptor = bindless_descriptor
                        .buffers
                        .iter()
                        .find(|bindless_buffer_descriptor| {
                            bindless_buffer_descriptor.bindless_index == bindless_index
                        })
                        .expect(
                            "Bindless buffer descriptor matching that bindless index should be \
                             present",
                        );
                    data_buffers.insert(
                        bindless_index,
                        MaterialDataBuffer::new(
                            buffer_descriptor.binding_number,
                            buffer_descriptor
                                .size
                                .expect("Data buffers should have a size")
                                as u32,
                        ),
                    );
                }
                BindlessResourceType::SamplerFiltering
                | BindlessResourceType::SamplerNonFiltering
                | BindlessResourceType::SamplerComparison => {
                    samplers.insert(
                        *bindless_resource_type,
                        MaterialBindlessBindingArray::new(
                            *bindless_resource_type.binding_number().unwrap(),
                            *bindless_resource_type,
                        ),
                    );
                }
                BindlessResourceType::Texture1d
                | BindlessResourceType::Texture2d
                | BindlessResourceType::Texture2dArray

View on GitHub (pinned to 396ca72708)

Solutions

1. Report as a Bevy engine bug with a reproducing project
2. Check that Data bindings declare consistent sizes in the material

When it happens

Trigger: Thrown at crates/bevy_render/src/material_bind_groups.rs:2276 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/1a11586b99a18699. Report an issue: GitHub.