DoN may cause unexpected sequence of execution when mixing sync and async code.

[metasansana]

Example:

doFuture(function *() {
  let x = syncFunction();
  let y = yield asyncFunction(x);
 return  monad(y);
})

The syncFunction will be executed as soon as the generator is created. One might expect it to be instead executed when the future is forked. We need to investigate this deeper to determine what constitutes correct behavior.

[metasansana]

This may only be a problem because we tend to have side effects in there. For instance, syncFunction() modifying class properties etc.