Q module fails to load if e.stack throws

[murrayju]

The hasStacks logic at q.js#L86 could throw an Error, causing the module to fail to load. This can happen when something has overridden Error.prepareStackTrace() with a function that might throw. Although it looks like a property, e.stack will actually evaluate Error.prepareStackTrace() (and cache the result).

The solution is probably to surround e.stack in a try/catch.

A real example with more details can be found at jashkenas/coffeescript#4391.