How about adding to the source compatibility suite?

[linqingmo]

Swift 5.0 regression. SR-9375

[onevcat]

Thanks for reporting it.

Obviously, it turns to be a Swift 5.0 regression.

I will try to confirm it in the snapshot toolkit later, and send a PR to source compatibility repo to contain it to the regression test suite if necessary.

[onevcat]

We made a small workaround to make it compile for Swift development toolchain snapshot you mentioned. However, we are still seeing some crash in our unit tests when we use the snapshot version. And the same issue is happening in the sample app. So I guess it is not a good time to use this framework with that Swift compiler since we didn't have a good time to run full tests for it.

A pull request to Swift Source Compatibility repo was made: swiftlang/swift-source-compat-suite#295

There is little we can do now for this issue anymore. So I am closing it now.

[onevcat]

This issue should be already fixed in Swift: swiftlang/swift#21296