Trying to convert the model to TorchScript fails in 0.12.2

[naor2013]

🐛 Bug

To Reproduce

I tried to convert a model to TorchScript. This works in 0.10.1 and in 0.12.1 but fails in 0.12.2. The issue I see is:

object has no attribute _transformer_encoder_layer_fwd:
File "/opt/venv/lib/python3.7/site-packages/fairseq/modules/transformer_layer.py", line 319

Expected behavior

To convert successfully to TorchScript like in the other Fairseq versions.

Environment

• fairseq Version (e.g., 1.0 or main): 0.12.2
• PyTorch Version (e.g., 1.0): 1.11.0
• OS (e.g., Linux): Linux
• How you installed fairseq (pip, source): pip
• Build command you used (if compiling from source):
• Python version: 3.7
• CUDA/cuDNN version: 11.0
• GPU models and configuration: V100