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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 ErrorKit, reference 1.1.0 (2c1aa8), with Swift 5.9 for macOS (SPM) on 3 May 2025 13:15:42 UTC.

Build Command

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

Build Log

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RunAll
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Builder version: 4.61.3
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/FlineDev/ErrorKit.git
Reference: 1.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/FlineDev/ErrorKit
 * tag               1.1.0      -> FETCH_HEAD
HEAD is now at 2c1aa89 Merge pull request #35 from FlineDev/wip/error-mapper
Cloned https://github.com/FlineDev/ErrorKit.git
Revision (git rev-parse @):
2c1aa891c3ddcd2c2d86cbf3d7b63caeb0319253
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/FlineDev/ErrorKit.git at 1.1.0
========================================
Build
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Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD
https://github.com/FlineDev/ErrorKit.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 6.0.0 but the installed version is 5.9.0
BUILD FAILURE 5.9 macosSpm