<!-- This template is for bug reports. If you are reporting a bug, please continue on. If you are here for another reason (such as a feature request, change, or question) you can disregard this template --> **What version of async are you using?** **Which environment did the issue occur in (Node/browser/Babel/Typescript version)?** **Is there a compiler in your toolchain? If so, is it targeting ES2017 or later and preserving `async` functions?** **What did you do? Please include a minimal reproducible case illustrating issue.** **What did you expect to happen?** **What was the actual result?**