Flow coercing yield result without extra parens fails to parse

[aaronjensen]

This parses:

function* foo(z) {
  const x = ((yield 3): any)
}

But this does not:

function* foo(z) {
  const x = (yield 3: any)
}

https://babeljs.io/repl/#?evaluate=true&lineWrap=false&presets=es2015%2Creact%2Cstage-0%2Cstage-1%2Cstage-2%2Cstage-3&experimental=true&loose=true&spec=false&code=function*%20foo(z)%20%7B%0A%20%20const%20x%20%3D%20((yield%203)%3A%20any)%0A%7D%0A%0Afunction*%20foo(z)%20%7B%0A%20%20const%20x%20%3D%20(yield%203%3A%20any)%0A%7D

The latter is parseable by flow:

https://flowtype.org/try/#0GYVwdgxgLglg9mAVAAmHOAKAXgSmQbwChlkIEBnKZAD2QF5kMMBPGAUwBsATZAZhwBcyAIZhmOQgF9ChUJFgIUaTLgLFSFKrQYt23PkNHipQA

[nicolo-ribaudo]

Is this still a bug? In the repl it seems to work

[danez]

Yes seems this was fixed. We should add a testcase for this.

[zoecarver]

I have started adding some test cases 😃