1 - Reproduce the Bug
- When does it happen?
- What actions does the user take?
- How is the system configured?
- What is the minimum set of steps?
- Can we make it happen consistently?
2 - Find the Bug
- Observe state and behavior
- Use print statements, logger, or debugger
- Narrow down scope
- Identify specific methods and arguments/data
- Verify via unit tests
3- Fix the Bug
- Use unit tests to trigger problem
- Carefully edit code to fix bug
- Test fix
- Perform regression tests
- Look for any related issues
- Commit and deploy fixed code
The Art of Debugging Credit to Remy Sharp