Flow: No error when reassigning variable in a closure

[JakeCoxon]

Flow version: 0.94.0

Expected behavior

Since flow won't know whether the closure is called or not, I would expect the type of a to be string | number

Actual behavior

Type of a is string

Flow try

function myFunc(): string {
  let a = "a string";

  [1].forEach(() => {
    a = 2;
  });

  return a; // a is string
}

[dsainati1]

Yikes. This is pretty scary. Thanks for pointing this out. I think we have a fix in the works that should be out in one of the next versions.