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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

Successful build of CPUInfo, reference main (3ee364), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 09:39:35 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/p-x9/swift-cpu-info.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/p-x9/swift-cpu-info
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 3ee3646 Merge pull request #4 from p-x9/feature/arm-feature-ID_AA64SMFR0_EL1
Cloned https://github.com/p-x9/swift-cpu-info.git
Revision (git rev-parse @):
3ee36460b50ae0e1315d182b5a11f9591f4e236c
SUCCESS checkout https://github.com/p-x9/swift-cpu-info.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/p-x9/swift-cpu-info.git
https://github.com/p-x9/swift-cpu-info.git
{
  "dependencies" : [
    {
      "identity" : "swift-sysctl",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.8.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/p-x9/swift-sysctl.git"
    }
  ],
  "manifest_display_name" : "CPUInfo",
  "name" : "CPUInfo",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CPUInfo",
      "targets" : [
        "CPUInfo"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CPUInfoTests",
      "module_type" : "SwiftTarget",
      "name" : "CPUInfoTests",
      "path" : "Tests/CPUInfoTests",
      "sources" : [
        "CPUInfoTests.swift"
      ],
      "target_dependencies" : [
        "CPUInfo"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CPUInfoC",
      "module_type" : "ClangTarget",
      "name" : "CPUInfoC",
      "path" : "Sources/CPUInfoC",
      "product_memberships" : [
        "CPUInfo"
      ],
      "sources" : [
        "dummy.c"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CPUInfo",
      "module_type" : "SwiftTarget",
      "name" : "CPUInfo",
      "path" : "Sources/CPUInfo",
      "product_dependencies" : [
        "SwiftSysctl"
      ],
      "product_memberships" : [
        "CPUInfo"
      ],
      "sources" : [
        "CPUInfo+print.swift",
        "CPUInfo.swift",
        "Model/CPUFamily.swift",
        "Model/CPUSubFamily.swift",
        "Model/CPUSubType.swift",
        "Model/CPUThreadType.swift",
        "Model/CPUType.swift",
        "Model/Core.swift",
        "Protocol/CoreNodeProtocol.swift",
        "arm64/CPUInfo+features.swift"
      ],
      "target_dependencies" : [
        "CPUInfoC"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Building for debugging...
[0/4] Write sources
[2/4] Write swift-version-2F0A5646E1D333AE.txt
[3/4] Compiling CPUInfoC dummy.c
[5/67] Compiling SwiftSysctl OID+HW.swift
[6/67] Compiling SwiftSysctl OID+Kern.swift
[7/67] Compiling SwiftSysctl OID+MachDep.swift
[8/67] Compiling SwiftSysctl OID+Net.swift
[9/67] Compiling SwiftSysctl OID+VFS.swift
[10/67] Compiling SwiftSysctl OID+VM.swift
[11/67] Compiling SwiftSysctl OID+Debug.arm64.swift
[12/73] Compiling SwiftSysctl OID+VM.arm64.swift
[13/73] Compiling SwiftSysctl OID+Debug.x86_64.swift
[14/73] Compiling SwiftSysctl OID+HW.x86_64.swift
[15/73] Compiling SwiftSysctl OID+Kern.x86_64.swift
[16/73] Compiling SwiftSysctl OID+MachDep.x86_64.swift
[17/73] Compiling SwiftSysctl OID+Net.x86_64.swift
[18/73] Compiling SwiftSysctl OID+Security.x86_64.swift
[19/73] Compiling SwiftSysctl Nodes.swift
[20/73] Compiling SwiftSysctl CtlKind.swift
[21/73] Compiling SwiftSysctl CtlType.swift
[22/73] Compiling SwiftSysctl OID+Sysctl.swift
[23/73] Compiling SwiftSysctl OID+TopLevel.swift
[24/73] Compiling SwiftSysctl OID.swift
[25/73] Compiling SwiftSysctl OID+Debug.swift
[26/73] Compiling SwiftSysctl Nodes+MachDep.x86_64.swift
[27/73] Compiling SwiftSysctl Nodes+Net.x86_64.swift
[28/73] Compiling SwiftSysctl Nodes+Security.x86_64.swift
[29/73] Compiling SwiftSysctl Nodes+Sysctl.x86_64.swift
[30/73] Compiling SwiftSysctl Nodes+VFS.x86_64.swift
[31/73] Compiling SwiftSysctl Nodes+VM.x86_64.swift
[32/73] Compiling SwiftSysctl Nodes+Sysctl.swift
[33/73] Compiling SwiftSysctl OID+Sysctl.x86_64.swift
[34/73] Compiling SwiftSysctl OID+VFS.x86_64.swift
[35/73] Compiling SwiftSysctl OID+VM.x86_64.swift
[36/73] Compiling SwiftSysctl BitFlags.swift
[37/73] Compiling SwiftSysctl FieldProtocol.swift
[38/73] Compiling SwiftSysctl NodeCollection.swift
[39/73] Compiling SwiftSysctl OID+HW.arm64.swift
[40/73] Compiling SwiftSysctl OID+Kern.arm64.swift
[41/73] Compiling SwiftSysctl OID+MachDep.arm64.swift
[42/73] Compiling SwiftSysctl OID+Net.arm64.swift
[43/73] Compiling SwiftSysctl OID+Security.arm64.swift
[44/73] Compiling SwiftSysctl OID+Sysctl.arm64.swift
[45/73] Compiling SwiftSysctl OID+VFS.arm64.swift
[46/73] Compiling SwiftSysctl Nodes+Security.arm64.swift
[47/73] Compiling SwiftSysctl Nodes+Sysctl.arm64.swift
[48/73] Compiling SwiftSysctl Nodes+VFS.arm64.swift
[49/73] Compiling SwiftSysctl Nodes+VM.arm64.swift
[50/73] Compiling SwiftSysctl Nodes+Debug.x86_64.swift
[51/73] Compiling SwiftSysctl Nodes+HW.x86_64.swift
[52/73] Compiling SwiftSysctl Nodes+Kern.x86_64.swift
[53/73] Emitting module SwiftSysctl
[54/73] Compiling SwiftSysctl Sysctl+.swift
[55/73] Compiling SwiftSysctl Nodes+Debug.swift
[56/73] Compiling SwiftSysctl Nodes+HW.swift
[57/73] Compiling SwiftSysctl Nodes+Kern.swift
[58/73] Compiling SwiftSysctl Nodes+MachDep.swift
[59/73] Compiling SwiftSysctl Nodes+Net.swift
[60/73] Compiling SwiftSysctl Nodes+Security.swift
[61/73] Compiling SwiftSysctl Nodes+VFS.swift
[62/73] Compiling SwiftSysctl Nodes+VM.swift
[63/73] Compiling SwiftSysctl Nodes+Debug.arm64.swift
[64/73] Compiling SwiftSysctl Nodes+HW.arm64.swift
[65/73] Compiling SwiftSysctl Nodes+Kern.arm64.swift
[66/73] Compiling SwiftSysctl Nodes+MachDep.arm64.swift
[67/73] Compiling SwiftSysctl Nodes+Net.arm64.swift
[68/73] Compiling SwiftSysctl NodeProtocol.swift
[69/73] Compiling SwiftSysctl SwiftSysctl.swift
[70/73] Compiling SwiftSysctl SysctlError.swift
[71/73] Compiling SwiftSysctl TopNodes.swift
[72/73] Compiling SwiftSysctl Field.swift
[73/73] Compiling SwiftSysctl Node.swift
[74/83] Compiling CPUInfo CPUThreadType.swift
[75/83] Compiling CPUInfo CoreNodeProtocol.swift
[76/83] Compiling CPUInfo Core.swift
[77/84] Compiling CPUInfo CPUSubFamily.swift
[78/84] Compiling CPUInfo CPUType.swift
[79/84] Compiling CPUInfo CPUSubType.swift
[80/84] Compiling CPUInfo CPUInfo.swift
[81/84] Emitting module CPUInfo
/Users/admin/builder/spi-builder-workspace/Sources/CPUInfo/CPUInfo+print.swift:52:24: warning: static property 'formatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 50 |
 51 | extension CInt {
 52 |     private static var formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'formatter' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: add '@MainActor' to make static property 'formatter' part of global actor 'MainActor'
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 53 |         let formatter = ByteCountFormatter()
 54 |         formatter.countStyle = .memory
[82/84] Compiling CPUInfo CPUFamily.swift
[83/84] Compiling CPUInfo CPUInfo+print.swift
/Users/admin/builder/spi-builder-workspace/Sources/CPUInfo/CPUInfo+print.swift:52:24: warning: static property 'formatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 50 |
 51 | extension CInt {
 52 |     private static var formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'formatter' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: add '@MainActor' to make static property 'formatter' part of global actor 'MainActor'
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 53 |         let formatter = ByteCountFormatter()
 54 |         formatter.countStyle = .memory
[84/84] Compiling CPUInfo CPUInfo+features.swift
Build complete! (9.66s)
Fetching https://github.com/p-x9/swift-sysctl.git
[1/513] Fetching swift-sysctl
Fetched https://github.com/p-x9/swift-sysctl.git from cache (0.87s)
Computing version for https://github.com/p-x9/swift-sysctl.git
Computed https://github.com/p-x9/swift-sysctl.git at 0.8.0 (1.32s)
Creating working copy for https://github.com/p-x9/swift-sysctl.git
Working copy of https://github.com/p-x9/swift-sysctl.git resolved at 0.8.0
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-sysctl",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.8.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/p-x9/swift-sysctl.git"
    }
  ],
  "manifest_display_name" : "CPUInfo",
  "name" : "CPUInfo",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CPUInfo",
      "targets" : [
        "CPUInfo"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CPUInfoTests",
      "module_type" : "SwiftTarget",
      "name" : "CPUInfoTests",
      "path" : "Tests/CPUInfoTests",
      "sources" : [
        "CPUInfoTests.swift"
      ],
      "target_dependencies" : [
        "CPUInfo"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CPUInfoC",
      "module_type" : "ClangTarget",
      "name" : "CPUInfoC",
      "path" : "Sources/CPUInfoC",
      "product_memberships" : [
        "CPUInfo"
      ],
      "sources" : [
        "dummy.c"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CPUInfo",
      "module_type" : "SwiftTarget",
      "name" : "CPUInfo",
      "path" : "Sources/CPUInfo",
      "product_dependencies" : [
        "SwiftSysctl"
      ],
      "product_memberships" : [
        "CPUInfo"
      ],
      "sources" : [
        "CPUInfo+print.swift",
        "CPUInfo.swift",
        "Model/CPUFamily.swift",
        "Model/CPUSubFamily.swift",
        "Model/CPUSubType.swift",
        "Model/CPUThreadType.swift",
        "Model/CPUType.swift",
        "Model/Core.swift",
        "Protocol/CoreNodeProtocol.swift",
        "arm64/CPUInfo+features.swift"
      ],
      "target_dependencies" : [
        "CPUInfoC"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.