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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 JSONConfig with Swift 6.0 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

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RunAll
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Builder version: 4.40.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/iamjono/jsonconfig.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/iamjono/jsonconfig
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at e4c50a3 Merge pull request #3 from kjessup/master
Cloned https://github.com/iamjono/jsonconfig.git
Revision (git rev-parse @):
e4c50a3b9f75014243b72ff6ed569dea961579b7
SUCCESS checkout https://github.com/iamjono/jsonconfig.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/iamjono/jsonconfig.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-6F35C1178C84523A.txt
[4/13] Compiling PerfectLib SysProcess.swift
[5/13] Compiling PerfectLib JSONConvertible.swift
[6/13] Compiling PerfectLib File.swift
[7/13] Compiling PerfectLib Dir.swift
[8/13] Compiling PerfectLib PerfectServer.swift
[9/13] Compiling PerfectLib PerfectError.swift
[10/13] Compiling PerfectLib Bytes.swift
[11/13] Emitting module PerfectLib
[12/13] Compiling PerfectLib Utilities.swift
[13/13] Compiling PerfectLib Log.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/PerfectLib/Sources/PerfectLib/Log.swift:73:28: error: cannot convert value of type 'CVaListPointer' to expected argument type '__darwin_va_list?' (aka 'Optional<UnsafeMutablePointer<Int8>>')
 71 | #if os(Linux) || os(macOS)
 72 | 		withVaList(args) {
 73 | 			vsyslog(priority, "%s", $0)
    |                            `- error: cannot convert value of type 'CVaListPointer' to expected argument type '__darwin_va_list?' (aka 'Optional<UnsafeMutablePointer<Int8>>')
 74 | 		}
 75 | #else
Fetching https://github.com/PerfectlySoft/PerfectLib.git
[1/10784] Fetching perfectlib
Fetched https://github.com/PerfectlySoft/PerfectLib.git from cache (2.62s)
Computing version for https://github.com/PerfectlySoft/PerfectLib.git
Computed https://github.com/PerfectlySoft/PerfectLib.git at 3.1.4 (2.26s)
Creating working copy for https://github.com/PerfectlySoft/PerfectLib.git
Working copy of https://github.com/PerfectlySoft/PerfectLib.git resolved at 3.1.4
BUILD FAILURE 6.0 macosSpm
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.