sequelize/bluebird — pull request #2 by tedjt (2014-08-06 17:09:49+00:00)
Title: remove set of readonly error property length

This regularly causes errors for me

unable to set readonly property length of Error
/node_modules/sequelize/node_modules/sequelize-bluebird/js/main/errors.js:84
19 AggregateError.prototype.length = 0;