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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 SMTPKitten, reference 1.0.0-alpha.1 (c242d7), with Swift 5.8 for macOS (SPM) on 29 Aug 2024 11:52:12 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-14.3.1.app xcrun swift build --arch arm64

Build Log

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RunAll
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Builder version: 4.52.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/Joannis/SMTPKitten.git
Reference: 1.0.0-alpha.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Joannis/SMTPKitten
 * tag               1.0.0-alpha.1 -> FETCH_HEAD
HEAD is now at c242d70 Read in the hostname
Cloned https://github.com/Joannis/SMTPKitten.git
Revision (git rev-parse @):
c242d70e28af497e710d6f99e4c4beb6774c3817
SUCCESS checkout https://github.com/Joannis/SMTPKitten.git at 1.0.0-alpha.1
========================================
Build
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Selected platform:         macosSpm
Swift version:             5.8
Building package at path:  $PWD
https://github.com/Joannis/SMTPKitten.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-14.3.1.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': package 'spi-builder-workspace' is using Swift tools version 5.9.0 but the installed version is 5.8.1
BUILD FAILURE 5.8 macosSpm