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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 PackageBuildInfo, reference master (b58288), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 21:38:25 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/DimaRU/PackageBuildInfo.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/DimaRU/PackageBuildInfo
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b58288c Merge pull request #5 from mattes-bru/master
Cloned https://github.com/DimaRU/PackageBuildInfo.git
Revision (git rev-parse @):
b58288cada24fdaaedaaa329afe52d910794fdb2
SUCCESS checkout https://github.com/DimaRU/PackageBuildInfo.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/DimaRU/PackageBuildInfo.git
https://github.com/DimaRU/PackageBuildInfo.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "PackageBuildInfo",
  "name" : "PackageBuildInfo",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "PackageBuildInfoPlugin",
      "targets" : [
        "PackageBuildInfoPlugin"
      ],
      "type" : {
        "plugin" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PackageBuildInfoPlugin",
      "module_type" : "PluginTarget",
      "name" : "PackageBuildInfoPlugin",
      "path" : "Plugins/PackageBuildInfoPlugin",
      "plugin_capability" : {
        "type" : "buildTool"
      },
      "product_memberships" : [
        "PackageBuildInfoPlugin"
      ],
      "sources" : [
        "plugin.swift"
      ],
      "target_dependencies" : [
        "PackageBuildInfo"
      ],
      "type" : "plugin"
    },
    {
      "c99name" : "PackageBuildInfo",
      "module_type" : "BinaryTarget",
      "name" : "PackageBuildInfo",
      "path" : "Binaries/PackageBuildInfo.artifactbundle",
      "product_memberships" : [
        "PackageBuildInfoPlugin"
      ],
      "sources" : [
      ],
      "type" : "binary"
    }
  ],
  "tools_version" : "5.6"
}
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
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
BUILD FAILURE 6.1 macosSpm