---
id: pr-flashinfer-2564
repo: flashinfer-ai/flashinfer
pr: 2564
title: 'fix: W4A8 autotune crash in cutlass_fused_moe profiler workspace'
author: ccs1112
date: '2026-02-18'
url: https://github.com/flashinfer-ai/flashinfer/pull/2564
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 127699c2ca45521f7aa1dd8c3c653a78b363dc6a
inclusion_reason: kernel file changes
changed_paths:
- csrc/fused_moe/cutlass_backend/cutlass_fused_moe_kernels.cuh
- tests/moe/test_trtllm_cutlass_fused_moe.py
head_ref_oid: 043e1827d62b7816098392b82143664342bbc222
artifact_dir: evidence/pull-bundles/flashinfer/gh-2564
---
# fix: W4A8 autotune crash in cutlass_fused_moe profiler workspace

- Repository: `flashinfer-ai/flashinfer`
- PR: [2564](https://github.com/flashinfer-ai/flashinfer/pull/2564)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/fused_moe/cutlass_backend/cutlass_fused_moe_kernels.cuh`
- `tests/moe/test_trtllm_cutlass_fused_moe.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2564`
