E0207: backend execution error on sample N
What happened
During a conformance harness run, the backend under test returned an execution error for sample sample_idx. The harness stops collecting results for this sample and reports the error.
Why
The backend failed at runtime for this specific input. This could be:
- A driver crash on a particular input pattern
- A resource exhaustion that manifests only for certain input sizes
- An unhandled edge case in the backend’s execution path (e.g. an all-zero input)
How to fix
- Isolate the failing sample: run the backend directly on sample
sample_idx from the fixture set to reproduce the error outside the harness.
- Check the
detail field in the error message — it contains the backend’s original error.
- Fix the backend to handle this input class, then re-run the conformance suite.
Example
