| diff --git a/fastkernels/validate/bench_sglang.py b/fastkernels/validate/bench_sglang.py | |
| index b344616..f6ec20d 100644 | |
| --- a/fastkernels/validate/bench_sglang.py | |
| +++ b/fastkernels/validate/bench_sglang.py | |
| def main(): | |
| from sglang.srt.server_args import ServerArgs as _ServerArgs | |
| - _fields = {f.name for f in _dc.fields(_ServerArgs)} | |
| + # SGLang >= 0.5.20 made ServerArgs a msgspec Struct, which | |
| + # dataclasses.fields() rejects. | |
| + if _dc.is_dataclass(_ServerArgs): | |
| + _fields = {f.name for f in _dc.fields(_ServerArgs)} | |
| + else: | |
| + _fields = set(getattr(_ServerArgs, "__struct_fields__", ())) | |
| if "cuda_graph_max_bs" in _fields: | |
| engine_kwargs["cuda_graph_max_bs"] = _cg_max_bs | |
| else: | |