IndexError: dimension specified as 0 but tensor has no dimensions

[kaushikb11]

🐛 Bug

TPUs training throwing the following error during validation.

https://colab.research.google.com/drive/1rHBxrtopwtF8iLpmC_e7yl3TeDGrseJL?usp=sharing

Expected behavior

Environment

Note: Bugs with code are solved faster ! Colab Notebook should be made public !

• IDE: Please, use our python bug_report_model.py template.

• Colab Notebook: Please copy and paste the output from our environment collection script (or fill out the checklist below manually).

You can get the script and run it with:

wget https://raw.githubusercontent.com/PyTorchLightning/pytorch-lightning/master/tests/collect_env_details.py
# For security purposes, please check the contents of collect_env_details.py before running it.
python collect_env_details.py

• PyTorch Version (e.g., 1.0):
• OS (e.g., Linux):
• How you installed PyTorch (conda, pip, source):
• Build command you used (if compiling from source):
• Python version:
• CUDA/cuDNN version:
• GPU models and configuration:
• Any other relevant information:

Additional context

[tchaton]

@kaushikb11 Any code to share ?

[kaushikb11]

@tchaton https://colab.research.google.com/drive/1rHBxrtopwtF8iLpmC_e7yl3TeDGrseJL?usp=sharing
The one, Will shared.