gfx-rs/wgpu · error

TIMESTAMP_QUERY_INSIDE_PASSES feature must be enabled to cal

Error message

TIMESTAMP_QUERY_INSIDE_PASSES feature must be enabled to call write_timestamp in a render pass.

What it means

Panic from the WebGPU backend's write_timestamp stub on a render pass. The browser API exposes no equivalent of writing a timestamp inside a pass, so the method is intentionally unimplemented and any call aborts immediately.

Source

Thrown at wgpu/src/backend/webgpu.rs:3961

        _max_count: u32,
    ) {
        panic!("MESH_SHADER feature must be enabled to call multi_draw_mesh_tasks_indirect_count")
    }

    fn insert_debug_marker(&mut self, label: &str) {
        self.inner.insert_debug_marker(label);
    }

    fn push_debug_group(&mut self, group_label: &str) {
        self.inner.push_debug_group(group_label);
    }

    fn pop_debug_group(&mut self) {
        self.inner.pop_debug_group();
    }

    fn write_timestamp(&mut self, _query_set: &dispatch::DispatchQuerySet, _query_index: u32) {
        panic!("TIMESTAMP_QUERY_INSIDE_PASSES feature must be enabled to call write_timestamp in a render pass.")
    }

    fn begin_occlusion_query(&mut self, query_index: u32) {
        self.inner.begin_occlusion_query(query_index);
    }

    fn end_occlusion_query(&mut self) {
        self.inner.end_occlusion_query();
    }

    fn begin_pipeline_statistics_query(
        &mut self,
        _query_set: &dispatch::DispatchQuerySet,
        _query_index: u32,
    ) {
        // Removed from WebGPU in https://github.com/gpuweb/gpuweb/pull/2296
    }

View on GitHub (pinned to 3e11ff59bf)

Solutions

1. Move timestamp writes to the command encoder level if supported
2. Skip timestamp queries entirely when running on the WebGPU backend

When it happens

Trigger: Thrown at wgpu/src/backend/webgpu.rs:3961 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of gfx-rs/wgpu@3e11ff59bf (2026-09-03). Data as JSON: /api/errors/ef8cbc9437b22dd7. Report an issue: GitHub.