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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 TypoChecker 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

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/t-osawa-009/TypoChecker.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/t-osawa-009/TypoChecker
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at d8fd920 Update README.md
Cloned https://github.com/t-osawa-009/TypoChecker.git
Revision (git rev-parse @):
d8fd920373f54a6e649a23cc6093a51db4e53985
SUCCESS checkout https://github.com/t-osawa-009/TypoChecker.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/t-osawa-009/TypoChecker.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...
[0/8] Write sources
[3/8] Write TypoChecker-entitlement.plist
[4/8] Write swift-version-6F35C1178C84523A.txt
[6/14] Compiling UniYAML YAML.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-uniyaml/Sources/UniYAML/YAML.swift:218:12: error: cannot assign to property: 'key' is a 'let' constant
 34 | 	let indent: Int
 35 | 	var type: YAMLType
 36 | 	let key: String?
    |  `- note: change 'let' to 'var' to make it mutable
 37 | 	let tag: String?
 38 | 	var value: Any?
    :
216 | 				return nil
217 | 			}
218 | 			obj[k]!.key = k
    |            `- error: cannot assign to property: 'key' is a 'let' constant
219 | 		}
220 | 		indent = 0
[7/14] Compiling Files Files.swift
[8/14] Emitting module Files
[9/14] Emitting module UniYAML
[10/14] Compiling UniYAML Decoder.swift
[11/14] Compiling UniYAML Encoder.swift
Fetching https://github.com/JohnSundell/Files.git
Fetching https://github.com/seznam/swift-uniyaml.git
[1/207] Fetching swift-uniyaml
[208/1438] Fetching swift-uniyaml, files
Fetched https://github.com/JohnSundell/Files.git from cache (1.05s)
Fetched https://github.com/seznam/swift-uniyaml.git from cache (1.05s)
Computing version for https://github.com/JohnSundell/Files.git
Computed https://github.com/JohnSundell/Files.git at 2.3.0 (2.24s)
Computing version for https://github.com/seznam/swift-uniyaml.git
Computed https://github.com/seznam/swift-uniyaml.git at 0.11.1 (0.65s)
Creating working copy for https://github.com/seznam/swift-uniyaml.git
Working copy of https://github.com/seznam/swift-uniyaml.git resolved at 0.11.1
Creating working copy for https://github.com/JohnSundell/Files.git
Working copy of https://github.com/JohnSundell/Files.git resolved at 2.3.0
BUILD FAILURE 6.0 macosSpm
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.