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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 FlatBuffers, reference master (609c72), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 13:12:53 UTC.

Swift 6 data race errors: 0

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/google/flatbuffers.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/google/flatbuffers
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 609c72c [C++] Fixes #8446 (#8447)
Cloned https://github.com/google/flatbuffers.git
Revision (git rev-parse @):
609c72ca1a7526f444a109bc04f861ad578e833d
SUCCESS checkout https://github.com/google/flatbuffers.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/google/flatbuffers.git
https://github.com/google/flatbuffers.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "FlatBuffers",
  "name" : "FlatBuffers",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    }
  ],
  "products" : [
    {
      "name" : "FlatBuffers",
      "targets" : [
        "FlatBuffers"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FlatBuffers",
      "module_type" : "SwiftTarget",
      "name" : "FlatBuffers",
      "path" : "swift/Sources",
      "product_memberships" : [
        "FlatBuffers"
      ],
      "sources" : [
        "FlatBuffers/ByteBuffer.swift",
        "FlatBuffers/Constants.swift",
        "FlatBuffers/Enum.swift",
        "FlatBuffers/FlatBufferBuilder.swift",
        "FlatBuffers/FlatBufferObject.swift",
        "FlatBuffers/FlatBuffersUtils.swift",
        "FlatBuffers/FlatbuffersErrors.swift",
        "FlatBuffers/Int+extension.swift",
        "FlatBuffers/Message.swift",
        "FlatBuffers/Mutable.swift",
        "FlatBuffers/NativeObject.swift",
        "FlatBuffers/Offset.swift",
        "FlatBuffers/Root.swift",
        "FlatBuffers/String+extension.swift",
        "FlatBuffers/Struct.swift",
        "FlatBuffers/Table.swift",
        "FlatBuffers/TableVerifier.swift",
        "FlatBuffers/VeriferOptions.swift",
        "FlatBuffers/Verifiable.swift",
        "FlatBuffers/Verifier.swift",
        "FlatBuffers/_InternalByteBuffer.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
warning: 'spi-builder-workspace': /Users/admin/builder/spi-builder-workspace/Package.swift:23:11: warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
21 |   name: "FlatBuffers",
22 |   platforms: [
23 |     .iOS(.v11),
   |           `- warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
24 |     .macOS(.v10_14),
25 |   ],
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...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/22] Emitting module FlatBuffers
[4/24] Compiling FlatBuffers Verifier.swift
[5/24] Compiling FlatBuffers _InternalByteBuffer.swift
[6/24] Compiling FlatBuffers String+extension.swift
[7/24] Compiling FlatBuffers Struct.swift
[8/24] Compiling FlatBuffers Table.swift
[9/24] Compiling FlatBuffers TableVerifier.swift
[10/24] Compiling FlatBuffers FlatBuffersUtils.swift
[11/24] Compiling FlatBuffers FlatbuffersErrors.swift
[12/24] Compiling FlatBuffers Int+extension.swift
[13/24] Compiling FlatBuffers Message.swift
[14/24] Compiling FlatBuffers Mutable.swift
[15/24] Compiling FlatBuffers NativeObject.swift
[16/24] Compiling FlatBuffers ByteBuffer.swift
[17/24] Compiling FlatBuffers Constants.swift
[18/24] Compiling FlatBuffers Enum.swift
[19/24] Compiling FlatBuffers FlatBufferBuilder.swift
[20/24] Compiling FlatBuffers FlatBufferObject.swift
[21/24] Compiling FlatBuffers VeriferOptions.swift
[22/24] Compiling FlatBuffers Verifiable.swift
[23/24] Compiling FlatBuffers Offset.swift
[24/24] Compiling FlatBuffers Root.swift
Build complete! (5.96s)
warning: 'spi-builder-workspace': /Users/admin/builder/spi-builder-workspace/Package.swift:23:11: warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
21 |   name: "FlatBuffers",
22 |   platforms: [
23 |     .iOS(.v11),
   |           `- warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
24 |     .macOS(.v10_14),
25 |   ],
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "FlatBuffers",
  "name" : "FlatBuffers",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    }
  ],
  "products" : [
    {
      "name" : "FlatBuffers",
      "targets" : [
        "FlatBuffers"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FlatBuffers",
      "module_type" : "SwiftTarget",
      "name" : "FlatBuffers",
      "path" : "swift/Sources",
      "product_memberships" : [
        "FlatBuffers"
      ],
      "sources" : [
        "FlatBuffers/ByteBuffer.swift",
        "FlatBuffers/Constants.swift",
        "FlatBuffers/Enum.swift",
        "FlatBuffers/FlatBufferBuilder.swift",
        "FlatBuffers/FlatBufferObject.swift",
        "FlatBuffers/FlatBuffersUtils.swift",
        "FlatBuffers/FlatbuffersErrors.swift",
        "FlatBuffers/Int+extension.swift",
        "FlatBuffers/Message.swift",
        "FlatBuffers/Mutable.swift",
        "FlatBuffers/NativeObject.swift",
        "FlatBuffers/Offset.swift",
        "FlatBuffers/Root.swift",
        "FlatBuffers/String+extension.swift",
        "FlatBuffers/Struct.swift",
        "FlatBuffers/Table.swift",
        "FlatBuffers/TableVerifier.swift",
        "FlatBuffers/VeriferOptions.swift",
        "FlatBuffers/Verifiable.swift",
        "FlatBuffers/Verifier.swift",
        "FlatBuffers/_InternalByteBuffer.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
warning: 'spi-builder-workspace': /Users/admin/builder/spi-builder-workspace/Package.swift:23:11: warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
21 |   name: "FlatBuffers",
22 |   platforms: [
23 |     .iOS(.v11),
   |           `- warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
24 |     .macOS(.v10_14),
25 |   ],
Done.