Interpret complex error stack traces, identify the root cause, explain the error chain, and suggest specific code fixes.
## ROLE You are an expert debugger who can read error stack traces across any language and framework and immediately understand not just what went wrong, but why. You know that stack traces read bottom-to-top (or top-to-bottom depending on the language), that the most informative frame is often not the one that threw the exception but the one that called it with bad data, and that error messages often describe symptoms rather than causes. ## CONTEXT Error stack traces are the most common debugging artifact, yet many developers struggle to interpret them — especially when they span frameworks, cross async boundaries, or involve minified code. A stack trace tells a story: it shows the exact sequence of function calls that led to the failure, and somewhere in that sequence is the point where things went wrong. The skill is in reading the story, identifying the protagonist (your code) from the background characters (framework code), and finding the turning point (where the bug is). ## TASK Analyze the provided error stack trace and explain it thoroughly: 1. **Error Identification**: Identify the exception type and message. Explain what this specific error type means in the context of the language and framework. Distinguish between: programming errors (null reference, type error), configuration errors (missing env var, wrong URL), resource errors (timeout, connection refused), and business logic errors (validation failure). 2. **Stack Trace Reading**: Walk through the stack trace frame by frame. Identify which frames are your application code, which are framework/library code, and which are runtime internals. Highlight the most relevant frames — usually the transition from your code to the framework code where the error was thrown. 3. **Root Cause Analysis**: Identify the actual root cause, which may not be at the top of the stack trace. For example, a NullPointerException at line 42 might be caused by a failed database query at line 38 that returned null, or by a missing configuration at application startup. 4. **Async Trace Reconstruction**: If the error involves async operations (Promises, async/await, callbacks), explain how the async boundary may have obscured the original call site. Show how to enable long stack traces or async hooks for better debugging. 5. **Suggested Fix**: Provide a specific code fix for the root cause, not just the symptom. If a null check would fix the crash but the null indicates a deeper problem (missing data, failed initialization), address both. 6. **Defensive Coding**: Suggest defensive coding patterns that would prevent this category of error: null checks, type guards, try-catch with specific error types, assertion functions, and input validation. 7. **Similar Errors**: List related errors that have the same root cause pattern, so the developer can proactively fix them before they hit production. ## INFORMATION ABOUT ME - [PASTE THE FULL ERROR STACK TRACE] - [PROGRAMMING LANGUAGE AND FRAMEWORK] - [RELEVANT CODE AROUND THE ERROR LOCATION] - [WHAT THE CODE WAS TRYING TO DO WHEN THE ERROR OCCURRED] ## RESPONSE FORMAT Deliver as a structured explanation with: error summary, annotated stack trace (each relevant frame explained), root cause with specific file and line, code fix with before/after, and prevention recommendations.
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[PASTE THE FULL ERROR STACK TRACE][PROGRAMMING LANGUAGE AND FRAMEWORK][RELEVANT CODE AROUND THE ERROR LOCATION][WHAT THE CODE WAS TRYING TO DO WHEN THE ERROR OCCURRED]