Transpiled async generators return a promise value

[falsandtru]

At least Chrome unwraps promise values. This makes a different runtime behavior.

TypeScript Version: 2.7.0-dev.201xxxxx

Search Terms:

Code

(async function* () {yield Promise.resolve(0)})().next().then(console.log)

Expected behavior:

Outputs {value: 0, done: false}.

Actual behavior:

Outputs {value: Promise, done: false}.

Playground Link:

Related Issues:

[Jessidhia]

Related to #21115

[falsandtru]

Thanks, it seems to address the same issue.