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crash-log-analyzer

Testing & Quality
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Parse and analyze macOS crash logs to identify crash causes and debugging information

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How to use this skill

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/crash-log-analyzer/SKILL.md

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Crash Log Analyzer

Parse macOS .crash and .ips files to extract useful debugging information.

Capabilities

  • Parse crash report files
  • Symbolicate stack traces
  • Identify crash type (EXC_BAD_ACCESS, assertion, etc.)
  • Extract thread information
  • Show crash location and context
  • Identify common crash patterns
  • Generate crash statistics
  • Find duplicate crashes
  • Export crash data

Tools Included

crash_analyzer.py

Python script to parse crash logs

Commands:

# Analyze crash log
./crash_analyzer.py crash.crash

# Symbolicate (requires dSYM)
./crash_analyzer.py crash.crash --dsym PaleoRose.app.dSYM

# Batch analyze directory
./crash_analyzer.py --batch ~/Library/Logs/DiagnosticReports/PaleoRose*

# Export summary
./crash_analyzer.py crash.crash --export-json summary.json

# Find duplicates
./crash_analyzer.py --find-duplicates ~/Library/Logs/DiagnosticReports/

Crash Types Handled

  • EXC_BAD_ACCESS (SIGSEGV, SIGBUS)
  • EXC_CRASH (SIGABRT)
  • Uncaught exceptions
  • Assertions
  • Watchdog timeouts
  • Stack overflow

Usage

Use when:

  • App crashes during testing
  • Need to analyze user crash reports
  • Debugging difficult-to-reproduce crashes
  • Tracking crash patterns
  • Preparing crash reports for issues

Output Format

Crash Summary
-------------
Process: PaleoRose
Bundle ID: com.example.paleorose
Version: 1.0.0
Date: 2025-11-08 20:30:15

Crash Type: EXC_BAD_ACCESS (SIGSEGV)
Exception: KERN_INVALID_ADDRESS at 0x0000000000000000

Crashed Thread: 0 (Main Thread)

Stack Trace:
  0  PaleoRose  0x10045a123 -[TableListController tableView:objectValueFor:row:] + 123
  1  AppKit     0x7fff2b3c4567 -[NSTableView _sendDataSourceValue] + 234
  2  AppKit     0x7fff2b3c4890 -[NSTableView reloadData] + 567

Probable Cause: Null pointer dereference in tableNames array access
Recommendation: Add nil check before accessing tableNames[row]