"Symbol with identifier 's:So9NSDecimala10FoundationE11FormatStyleV8CurrencyV' couldn't be found" error

[stephencelis]

Description

Since Xcode 14 beta 4, I haven't been able to build the documentation for the following project:

https://github.com/pointfreeco/combine-schedulers

I get the following errors:

error build: Symbol with identifier 's:So9NSDecimala10FoundationE11FormatStyleV8CurrencyV' couldn't be found
error build: Symbol with identifier 's:So9NSDecimala10FoundationE11FormatStyleV7PercentV' couldn't be found

In case this is an Xcode issue I filed feedback FB11088354.

Is there a workaround that I can take advantage of to get documentation building in Xcode?

Checklist

• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue.

Expected Behavior

I expect the documentation to compile.

Actual behavior

It fails to compile.

Steps To Reproduce

1. Clone https://github.com/pointfreeco/combine-schedulers
2. Open in Xcode 14 beta 4, 5, or 6
3. Build documentation

Swift-DocC Version Information

Version bundled in Xcode 14

Swift Compiler Version Information

swift-driver version: 1.62.3 Apple Swift version 5.7 (swiftlang-5.7.0.123.8 clang-1400.0.29.50)
Target: arm64-apple-macosx12.0

[stephencelis]

We tracked down the issue in some code vendored from apple/swift that had an @_exported import Foundation in it. Not sure if this issue is still helpful to address in DocC/Xcode, though 😄

[franklinsch]

Thanks for filing! This seems like an issue in the Swift compiler. @QuietMisdreavus I believe you were looking into something similar?

[QuietMisdreavus]

This does look like an issue with Swift; you already found that re-exporting Foundation was the culprit, but the symbol graphs should still be well-formed enough that docc can run successfully. I'm going to migrate this to apple/swift so i can track it there.