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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build Windless, reference master (a2a0c0), with Swift 6.1 for watchOS using Xcode 16.3 on 25 Apr 2025 21:29:36 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

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RunAll
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Builder version: 4.61.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/ParkGwangBeom/Windless.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ParkGwangBeom/Windless
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at a2a0c0f Update README.md
Cloned https://github.com/ParkGwangBeom/Windless.git
Revision (git rev-parse @):
a2a0c0f5b3b75db6d5b7049b0d0b2163ac66cae3
SUCCESS checkout https://github.com/ParkGwangBeom/Windless.git at master
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Build
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Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/ParkGwangBeom/Windless.git
https://github.com/ParkGwangBeom/Windless.git
error: Source files for target Windless should be located under 'Sources/Windless', or a custom sources path can be set with the 'path' property in Package.swift
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
error: Source files for target Windless should be located under 'Sources/Windless', or a custom sources path can be set with the 'path' property in Package.swift
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
error: Source files for target Windless should be located under 'Sources/Windless', or a custom sources path can be set with the 'path' property in Package.swift
BUILD FAILURE 6.1 watchOS