Update futures implementation to not destroy callbacks #1649
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
JS engines guarantee that at least one of our
then
callbacks areinvoked, so that means if we destroy them prematurely they're guaranteed
to log an exception to the console! Instead to prevent exceptions from
happening tweak how the completion callbacks for JS futures are managed
and ensure that the closures stay alive until they're invoked later.
Closes #1637