*__awaiter_1 is not defined* when use with plugin of capacitor

[lucascco]

Stencil version:

 @stencil/core@1.5.4

I'm submitting a:

[ x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://stencil-worldwide.herokuapp.com/ or https://forum.ionicframework.com/

Current behavior:

When use plugin of capacitor, always that I call the @method async, the error __awaiter_1 is not defined happen. This error happen when I try use the web component in Wordpress.

Steps to reproduce:

https://github.com/lucascco/reproduce-error-stencil-async

Other information:
Just follow steps in repository above to reproduce this erro.

[manucorporat]

Seems related with microsoft/TypeScript#33547

[lotz]

We are also encountering this, not related to any plugins. It does occur when we pull in a Stencil component into another Stencil component, and they both use async/await.

[srclark213]

I'm seeing a similar issue with @aspnet/signalr library. Something is defining an __awaiter function inside the signalr library, so when it gets pulled into our stencil component all of our awaits get compiled to calls to __awaiter_1. However whatever generates the __awaiter function for the component doesn't call it __awaiter_1, it just re-declares __awaiter, such that in the output file I have two declarations of __awaiter, but all the calls are to __awaiter_1.

Tried setting "noEmitHelpers": true in my tsconfig which fixed other cases of these types of collisions but not the signalr collisions.

[lotz]

Thanks for working around this @manucorporat! This was blocking us from upgrading to a newer version of Stencil.

[robinsummerhill]

I'm also seeing this issue with Stencil 1.7.5. I can't upgrade to the version with the fix for this issue because it uses Typescript 3.7 and the generated component library is not compatible with Angular 8.