How to fix InternalError: Assertion failed (Node.js internal error) in Node.js

# Run your Node.js application with full error output
node --trace-uncaught app.js 2>&1 | tee error.log

# Or capture to a file for inspection
node app.js > error.log 2>&1

# Check current Node.js version
node --version

# Update using nvm (recommended)
nvm install --latest-lts
nvm use --latest-lts

# Or update using Homebrew (macOS)
brew upgrade node

# Or download from nodejs.org and reinstall
# https://nodejs.org/

// Example: If the error happens during connections, test connections in isolation
const net = require('net');

const client = new net.Socket();
client.connect(3000, 'localhost', () => {
  console.log('Connected');
  client.destroy();
});

client.on('error', (err) => {
  console.error('Connection error:', err);
});

client.on('timeout', () => {
  console.log('Connection timeout');
  client.destroy();
});

// Set a timeout to catch if assertion fails
setTimeout(() => {
  console.log('Test completed without assertion failure');
  process.exit(0);
}, 5000);

// Monitor memory usage
const { performance } = require('perf_hooks');

console.log('Memory at start:', process.memoryUsage());

// Run your operation
const start = performance.now();
// ... your code ...
const end = performance.now();

console.log('Memory at end:', process.memoryUsage());
console.log('Time taken:', end - start, 'ms');

// If memory grows unbounded, it might trigger internal checks
setInterval(() => {
  const mem = process.memoryUsage();
  if (mem.heapUsed > 1000 * 1024 * 1024) { // 1GB
    console.warn('High memory usage detected:', mem);
  }
}, 1000);

# List installed native modules (packages with `binding.node`)
npm ls | grep "binding.node"

# Try removing native modules temporarily
npm uninstall package-name

# Test if the assertion still occurs
node app.js

# Enable various debug modules
NODE_DEBUG=net,http,cluster node app.js

# Enable debug output for DNS operations
NODE_DEBUG=dns node app.js

# Enable debugging for worker threads
NODE_DEBUG=worker_threads node app.js

# Combine multiple debuggers
NODE_DEBUG=net,dns,http node app.js

# Create a minimal reproducible example in a separate file
cat > minimal-repro.js << 'EOF'
// Your minimal code that triggers the assertion
EOF

# Visit https://github.com/nodejs/node/issues
# Create a new issue with:
# 1. Node.js version (node --version)
# 2. Operating system
# 3. Minimal reproducible code
# 4. Full error stack trace
# 5. Steps to reproduce