[Parity] error: invalid redeclaration of '*'

[kcieplak]

Is it reproducible with SwiftPM command-line tools: swift build, swift test, swift package etc?

• Confirmed reproduction steps with SwiftPM CLI. The description text must include reproduction steps with either of command-line SwiftPM commands, swift build, swift test, swift package etc.

Description

https://github.com/AsyncSwiftKits/Hela.git

MacOS

The following package does not build using the 'swifbuild' backend but does with 'native'

swift build `--buildsystem=swiftbuild` fails to build package

info: Compile test_entry_point.swift (arm64)
    cd /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/53519B07-301E-435C-9AA2-78CB426AD61D
    
error: /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/53519B07-301E-435C-9AA2-78CB426AD61D/Hela/.build-swiftbuild/arm64-apple-macosx/Intermediates.noindex/Hela.build/Debug/HelaTests.build/DerivedSources/test_entry_point.swift:508:8 invalid redeclaration of 'Runner'
info: /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/53519B07-301E-435C-9AA2-78CB426AD61D/Hela/Tests/HelaTests/Runner.swift:3:8 'Runner' previously declared here
info: /private/var/lib/jenkins/workspace/swift_oss/swift-package-index-metrics@2/spi-workdir/53519B07-301E-435C-9AA2-78CB426AD61D/Hela/.build-swiftbuild/arm64-apple-macosx/Intermediates.noindex/Hela.build/Debug/HelaTests.build/DerivedSources/test_entry_point.swift:508:8: error: invalid redeclaration of 'Runner'

Expected behaviour

Builds

Actual behavior

Fails to build

Steps to reproduce

git clone https://github.com/AsyncSwiftKits/Hela.git
swift build --build-system=swiftbuild

Swift Package Manager version/commit hash

No response

Swift & OS version (output of swift --version ; uname -a)

No response

[owenv]

Resolved by swiftlang/swift-build#963