investigate

Root-cause analysis for a software defect is executed through a structured four-phase investigation: collecting symptoms, tracing code paths, testing hypotheses, and verifying fixes to prevent symptom-based patches.

The best way to avoid symptom-based fixes is to follow a systematic debugging workflow that enforces disciplined phases for symptom collection, code tracing, and hypothesis testing before implementing any code changes.

Code tracing with bash and grep during an investigation involves systematically searching and reading code paths to form a root-cause hypothesis, guided by a structured process that prompts for input when needed.

Yes, web search can be integrated into the debugging workflow to gather external evidence during the symptoms collection and hypothesis testing phases, supporting a comprehensive root-cause investigation.

You should escalate a software defect during a root-cause investigation when the structured workflow identifies complex scenarios that exceed the current tracing and hypothesis testing scope, providing clear evidence for escalation.

A systematic debugging workflow reduces regression risk by enforcing guided implementation and validation with tests, ensuring that fixes address the true root cause and preventing reoccurrence of the defect.