guaranteed-error

Fixes up error objects, and converts plain strings to error instances.

npm install guaranteed-error

---

try {
  doSomething()
} catch (err) {
  // err === 'something broke' (not an Error instance)
  err = guaranteedError(err)
  /* err is now an Error instance, with the following stack:
Error: something broke
    at <unknown>
  */
}