---
id: pr-vllm-34494
repo: vllm-project/vllm
pr: 34494
title: '[Bugfix] Handle num_expert_group=None in flashinfer block-scale FP8 MoE'
author: haosdent
date: '2026-02-15'
url: https://github.com/vllm-project/vllm/pull/34494
source_category: upstream-code
architectures:
- sm100
tags:
- block-scale
- fp8
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features:
- block-scale
- fp8
kernel_types:
- moe
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 79f3fab05a2d88a5db73591cd3b8afdf956ee723
inclusion_reason: kernel file changes
changed_paths:
- tests/kernels/moe/test_flashinfer.py
- vllm/model_executor/layers/fused_moe/flashinfer_trtllm_moe.py
head_ref_oid: 989f67c8bb41453f1b12e0de9a5e941c61544e63
artifact_dir: evidence/pull-bundles/vllm/gh-34494
---
# [Bugfix] Handle num_expert_group=None in flashinfer block-scale FP8 MoE

- Repository: `vllm-project/vllm`
- PR: [34494](https://github.com/vllm-project/vllm/pull/34494)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `tests/kernels/moe/test_flashinfer.py`
- `vllm/model_executor/layers/fused_moe/flashinfer_trtllm_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-34494`
