# Failure Analysis

```markdown
# Failure Analysis

## Summary
The Jenkins job **`clubb_restart_gfortran_test_branch` build 19** failed in the **restart comparison stage**, not during compilation.

## Evidence
- The build and source checks completed successfully:
  - `Build completed successfully, and all source code checks passed.`
- The failing stage was:
  - `Run the CLUBB restart test script`
- The restart script output was:
  - `Running standard bomex case... Done!`
  - `Running restart bomex case from halfway point... Done!`
  - `Results not bit-for-bit!`
- Jenkins then reported:
  - `ERROR: script returned exit code 1`
  - `Setting overall build result to FAILURE`

## Root Cause
The failure is a **bit-for-bit mismatch between the standard BOMEX run and the restarted BOMEX run**. This is consistent with a restart regression, not a build or test harness crash.

## Notes
- The compiler warnings shown earlier in the log did **not** stop the build and should not be treated as the root cause.
- The workspace also contains an untracked file:
  - `run_scripts/fort.10`
  This may be relevant if the restart test script writes or reuses runtime state, but the console log alone only proves a BFB mismatch.

## Recommended Next Steps
1. Compare the standard and restart BOMEX outputs to identify the first divergent timestep/variable.
2. Inspect `run_scripts/run_restart_test.py` and any restart-file handling for BOMEX.
3. Check whether the recent change in `jenkins_tests/llm_failure_analysis/analyze_failure.py` or the recent model/script updates altered restart behavior.
```

## Analysis Metadata

- Job: `clubb_restart_gfortran_test_branch`
- Build: `19`
- Build URL: http://carson.math.uwm.edu/jenkins/job/clubb_restart_gfortran_test_branch/19/
- Tool rounds: `1`

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Generated by `analyze_failure.py` in 5.5s.