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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 package-histogram, reference 0.1.3 (93a161), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 16:10:13 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/HdrHistogram/hdrhistogram-swift.git
Reference: 0.1.3
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/HdrHistogram/hdrhistogram-swift
 * tag               0.1.3      -> FETCH_HEAD
HEAD is now at 93a1618 add Sendable conformance (#27)
Cloned https://github.com/HdrHistogram/hdrhistogram-swift.git
Revision (git rev-parse @):
93a1618c8aa20f6a521a9da656a3e0591889e9dc
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/HdrHistogram/hdrhistogram-swift.git at 0.1.3
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/HdrHistogram/hdrhistogram-swift.git
https://github.com/HdrHistogram/hdrhistogram-swift.git
{
  "dependencies" : [
    {
      "identity" : "swift-numerics",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-numerics"
    },
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.4.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "package-histogram",
  "name" : "package-histogram",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "Histogram",
      "targets" : [
        "Histogram"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "HistogramExample",
      "targets" : [
        "HistogramExample"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HistogramTests",
      "module_type" : "SwiftTarget",
      "name" : "HistogramTests",
      "path" : "Tests/HistogramTests",
      "product_dependencies" : [
        "Numerics"
      ],
      "sources" : [
        "HistogramAutosizingTests.swift",
        "HistogramDataAccessTests.swift",
        "HistogramTests.swift"
      ],
      "target_dependencies" : [
        "Histogram"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HistogramExample",
      "module_type" : "SwiftTarget",
      "name" : "HistogramExample",
      "path" : "Sources/HistogramExample",
      "product_memberships" : [
        "HistogramExample"
      ],
      "sources" : [
        "HistogramExample.swift"
      ],
      "target_dependencies" : [
        "Histogram"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Histogram",
      "module_type" : "SwiftTarget",
      "name" : "Histogram",
      "path" : "Sources/Histogram",
      "product_dependencies" : [
        "Numerics"
      ],
      "product_memberships" : [
        "Histogram",
        "HistogramExample"
      ],
      "sources" : [
        "Histogram.swift"
      ],
      "type" : "library"
    }
  ],
  "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
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/13] Write sources
[6/13] Write HistogramExample-entitlement.plist
[7/13] Write sources
[8/13] Compiling _NumericsShims _NumericsShims.c
[9/13] Write swift-version-2F0A5646E1D333AE.txt
[11/23] Compiling RealModule Float80+Real.swift
[12/23] Compiling RealModule Real.swift
[13/23] Compiling RealModule Float+Real.swift
[14/24] Compiling RealModule ElementaryFunctions.swift
[15/24] Compiling RealModule AugmentedArithmetic.swift
[16/24] Compiling RealModule Float16+Real.swift
[17/24] Compiling RealModule ApproximateEquality.swift
[18/24] Compiling RealModule AlgebraicField.swift
[19/24] Emitting module RealModule
[20/24] Compiling RealModule Double+Real.swift
[21/24] Compiling RealModule RealFunctions.swift
[22/29] Compiling ComplexModule Differentiable.swift
[23/29] Compiling ComplexModule Complex.swift
[24/29] Compiling ComplexModule Arithmetic.swift
[25/29] Compiling ComplexModule ElementaryFunctions.swift
[26/29] Emitting module ComplexModule
[27/31] Compiling Numerics Numerics.swift
[28/31] Emitting module Numerics
[29/33] Emitting module Histogram
[30/33] Compiling Histogram Histogram.swift
[31/35] Emitting module HistogramExample
[32/35] Compiling HistogramExample HistogramExample.swift
[32/35] Write Objects.LinkFileList
[33/35] Linking HistogramExample
[34/35] Applying HistogramExample
Build complete! (17.72s)
Fetching https://github.com/apple/swift-docc-plugin
Fetching https://github.com/apple/swift-numerics from cache
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (1.11s)
Fetched https://github.com/apple/swift-numerics from cache (1.11s)
Computing version for https://github.com/apple/swift-docc-plugin
Computed https://github.com/apple/swift-docc-plugin at 1.4.3 (1.69s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit from cache
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.76s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (1.39s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.0.3 (0.56s)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at 1.4.3
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.0.3
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-numerics",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-numerics"
    },
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.4.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "package-histogram",
  "name" : "package-histogram",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "Histogram",
      "targets" : [
        "Histogram"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "HistogramExample",
      "targets" : [
        "HistogramExample"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HistogramTests",
      "module_type" : "SwiftTarget",
      "name" : "HistogramTests",
      "path" : "Tests/HistogramTests",
      "product_dependencies" : [
        "Numerics"
      ],
      "sources" : [
        "HistogramAutosizingTests.swift",
        "HistogramDataAccessTests.swift",
        "HistogramTests.swift"
      ],
      "target_dependencies" : [
        "Histogram"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HistogramExample",
      "module_type" : "SwiftTarget",
      "name" : "HistogramExample",
      "path" : "Sources/HistogramExample",
      "product_memberships" : [
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      ],
      "sources" : [
        "HistogramExample.swift"
      ],
      "target_dependencies" : [
        "Histogram"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Histogram",
      "module_type" : "SwiftTarget",
      "name" : "Histogram",
      "path" : "Sources/Histogram",
      "product_dependencies" : [
        "Numerics"
      ],
      "product_memberships" : [
        "Histogram",
        "HistogramExample"
      ],
      "sources" : [
        "Histogram.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Done.