Error2 reports
Fix TorchRuntimeError
in PyTorch
✅ Solution
TorchRuntimeError often arises from unexpected data types or shapes encountered during execution in compiled or customized PyTorch operations, particularly when tracing or using `torch.func`. To resolve this, ensure all custom operators and functions (especially those used with `torch.compile` or `torch.func`) correctly handle all possible data types and shapes they might receive, using explicit type and shape checking with `torch.Size` and `torch.dtype`, and employing defensive programming techniques like assertions or fallback mechanisms. Alternatively, explicitly provide type hints and shape information to the compiler when tracing or compiling the model.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Jan 13, 2026
Last reported:Jan 14, 2026