description: "An error handler for Express/Raven which adds additional fields (tags, extra) set on the error object"

raven-express-context-errorhandler.js

const raven = require('raven');

module.exports = client => (err, req, res, next) => {
	const status = err.status || err.statusCode || err.status_code || 500;

	// skip anything not marked as an internal server error
	if(status < 500) return next(err);

	const kwargs = raven.parsers.parseRequest(req);
	
	// Merge any Sentry-like fields from the Error to the raven args
	['tags', 'extra', 'user'].forEach(field => {
		if(err[field] && (typeof err[field] === 'object')) {
			kwargs[field] = Object.assign(err[field], kwargs[field]);
		}
	});

	client.captureError(err, kwargs, (result) => {
		res.sentry = client.getIdent(result);
		next(err, req, res);
	});
};

with the current description it's going to barf the next time you publish. it needs to be valid HJSON