Error: Illegal resolve reject invocation

ERROR: Illegal invocation, resolver resolve/reject must be called within a resolver context. Consider using the promise constructor instead.

This happens when using the deprecated old defer() api but calling the resolve and reject function not as a method - for example:

var d = Promise.defer();
d.resolve();  // this is fine
var copy = resolve; 
resolve(); // Throws the above error, use `function(){ d.resolve(); }` instead.

This might happen when doing something like:

myCallBackAPI("param", d.resolve);

In which case consider using the promise constructor that doesn't have this problem, using Function.prototype.bind or using automatic promisification if applicable.