Improve `waitgroups` #108

Annotations

11 warnings

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

`gc:option` is deprecated; use `mm:option` instead [Deprecated]

`=destroy`(dest.value) can raise an unlisted exception: Exception [Effect]

`gc:option` is deprecated; use `mm:option` instead [Deprecated]

`=destroy`(dest.value) can raise an unlisted exception: Exception [Effect]

`=destroy`(p.val[]) can raise an unlisted exception: Exception [Effect]

`=destroy`(p.val.value) can raise an unlisted exception: Exception [Effect]