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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 Hylo, reference main (095194), with Swift 5.9 for macOS (SPM) on 29 Apr 2025 12:42:38 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.61.1
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/hylo-lang/hylo.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/hylo-lang/hylo
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0951941 Merge pull request #1682 from hylo-lang/fix-1679
Submodule path 'SPMBuildToolSupport': checked out '7c0a5c10ccacf066163c36e2cfcba65c7a21e956'
Submodule 'SPMBuildToolSupport' (https://github.com/dabrahams/SPMBuildToolSupport.git) registered for path 'SPMBuildToolSupport'
Cloning into '/Users/admin/builder/spi-builder-workspace/SPMBuildToolSupport'...
Cloned https://github.com/hylo-lang/hylo.git
Revision (git rev-parse @):
0951941a8130322d3130f412e03ed47d38e386e0
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/hylo-lang/hylo.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD
https://github.com/hylo-lang/hylo.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': package 'spi-builder-workspace' is using Swift tools version 5.10.0 but the installed version is 5.9.0
BUILD FAILURE 5.9 macosSpm