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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 SwiftLibModbus, reference 2.0.5 (7d5603), with Swift 6.0 for watchOS using Xcode 16.2 on 26 Apr 2025 21:50:07 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/jollyjinx/SwiftLibModbus.git
Reference: 2.0.5
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/jollyjinx/SwiftLibModbus
 * tag               2.0.5      -> FETCH_HEAD
HEAD is now at 7d56036 updated readme
Cloned https://github.com/jollyjinx/SwiftLibModbus.git
Revision (git rev-parse @):
7d560360e6c08692be26c240216977ab96b54181
SUCCESS checkout https://github.com/jollyjinx/SwiftLibModbus.git at 2.0.5
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Build
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Selected platform:         watchOS
Swift version:             6.0
Building package at path:  $PWD
https://github.com/jollyjinx/SwiftLibModbus.git
Command line invocation:
    /Applications/Xcode-16.2.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/admin/builder/spi-builder-workspace/.dependencies
    IDEPackageSupportUseBuiltinSCM = YES
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 6.1.0 but the installed version is 6.0.0
Resolved source packages:
  spi-builder-workspace: (null)
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 6.1.0 but the installed version is 6.0.0
2025-04-26 14:50:04.447 xcodebuild[479:2788] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-26-04_14-50-0004.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'spi-builder-workspace' is using Swift tools version 6.1.0 but the installed version is 6.0.0
Command line invocation:
    /Applications/Xcode-16.2.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/admin/builder/spi-builder-workspace/.dependencies
    IDEPackageSupportUseBuiltinSCM = YES
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 6.1.0 but the installed version is 6.0.0
Resolved source packages:
  spi-builder-workspace: (null)
2025-04-26 14:50:06.235 xcodebuild[532:3112] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-26-04_14-50-0006.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'spi-builder-workspace' is using Swift tools version 6.1.0 but the installed version is 6.0.0
BUILD FAILURE 6.0 watchOS