bf99453d90
When RowParallelLinear has bias=True, the weight_loader crashes with an IndexError because it calls param_data.size(tp_dim) where tp_dim=1, but the bias tensor is 1D and only has dimension 0. The bias in RowParallelLinear is not sharded (all ranks hold the full bias, only rank 0 applies it), so skip the sharding logic for 1D params. Fixes GeeeekExplorer/nano-vllm#125