Generate Fix Suggestions from Errors

Analyze error patterns to suggest specific fixes and improvements.

When to Use

• Test failures need concrete solutions
• Build errors require remediation steps
• Code review finding actionable recommendations
• Automating fix suggestions for common errors
• Creating PR comments with suggestions

Quick Reference

# Categorize errors
grep "Error\|FAILED" output.log | sed 's/.*Error: //' | sort | uniq -c | sort -rn

# Get context around error
grep -B 3 -A 3 "AssertionError" output.log

# Extract error type
grep -o "Error[A-Za-z]*" output.log | sort | uniq -c

# Find patterns in multiple failures
for file in test_*.log; do
  echo "=== $file ==="
  grep "Error:" "$file" | head -3
done

Fix Generation Workflow

1. Analyze error: Categorize error type and context
2. Match pattern: Compare against known error patterns
3. Find root cause: Determine what caused the error
4. Generate suggestion: Recommend specific fix
5. Provide example: Show before/after code if applicable
6. Prioritize fixes: High impact fixes first
7. Report suggestions: Organized by priority

Common Error Patterns & Fixes

Assertion Errors:

• Pattern:

  assert_equal(actual, expected)

  fails
• Fix: Check expected value is correct, verify test logic
• Example: Update expected value or fix test setup

Type Mismatches:

• Pattern:

  TypeError

  ,

  AttributeError

  in function call
• Fix: Check argument types, verify method exists
• Example: Add type annotation or check imports

Out of Bounds:

• Pattern:

  IndexError

  or array access failure
• Fix: Verify array size, check loop bounds
• Example: Initialize array properly before access

Import/Module Errors:

• Pattern:

  ModuleNotFoundError

  ,

  ImportError

• Fix: Check module path, verify file exists
• Example: Add to

  __init__.mojo

  or fix path

Memory/Initialization:

• Pattern: Uninitialized variable, null pointer
• Fix: Ensure variable initialized before use
• Example: Add explicit initialization or use

  var

Output Format

Report suggestions with:

1. Error Summary - What went wrong
2. Root Cause - Why it happened
3. Fix Steps - Numbered remediation steps
4. Code Example - Before/after code snippet
5. Priority - Critical/High/Medium/Low
6. Testing - How to verify fix works

Priority Levels

Critical (fix immediately):

• Compilation errors
• All tests failing
• Core functionality broken
• Security issues

High (fix soon):

• Multiple tests failing
• Performance degradation
• Memory leaks
• Type safety issues

Medium (nice to have):

• Single test failing
• Code style issues
• Minor improvements
• Warnings

Low (backlog):

• Code polish
• Optional refactoring
• Documentation improvements

Error Handling

Problem	Solution
Unknown error type	Classify as "other", suggest general investigation
Insufficient context	Request more detailed error info
Multiple causes	Suggest fixes in priority order
No matching pattern	Flag for manual review
False positives	Verify suggestion with test run

References

• See extract-test-failures for error extraction
• See analyze-ci-failure-logs for CI-specific analysis
• See CLAUDE.md for code standards and error handling