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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 SnapshotTestingStitch, reference 1.2.0 (8e5e51), with Swift 6.1 for macOS (Xcode) using Xcode 16.3 on 26 Apr 2025 19:18:41 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SnapshotTestingStitch -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/sherlouk/swift-snapshot-testing-stitch.git
Reference: 1.2.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/sherlouk/swift-snapshot-testing-stitch
 * tag               1.2.0      -> FETCH_HEAD
HEAD is now at 8e5e510 Merge pull request #6 from alexey1312/feature/addHEICformat
Cloned https://github.com/sherlouk/swift-snapshot-testing-stitch.git
Revision (git rev-parse @):
8e5e510f85127550f75b94523e727185b54d8749
SUCCESS checkout https://github.com/sherlouk/swift-snapshot-testing-stitch.git at 1.2.0
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.1
Building package at path:  $PWD
https://github.com/sherlouk/swift-snapshot-testing-stitch.git
https://github.com/sherlouk/swift-snapshot-testing-stitch.git
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.8.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    },
    {
      "identity" : "snapshottestingheic",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/alexey1312/SnapshotTestingHEIC.git"
    }
  ],
  "manifest_display_name" : "SnapshotTestingStitch",
  "name" : "SnapshotTestingStitch",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "SnapshotTestingStitch",
      "targets" : [
        "SnapshotTestingStitch"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SnapshotTestingStitchTests",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitchTests",
      "path" : "Tests/SnapshotTestingStitchTests",
      "sources" : [
        "SnapshotTestingStitch.swift",
        "SnapshotTestingStitchHEIC.swift"
      ],
      "target_dependencies" : [
        "SnapshotTestingStitch"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SnapshotTestingStitch",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitch",
      "path" : "Sources/SnapshotTestingStitch",
      "product_dependencies" : [
        "SnapshotTesting",
        "SnapshotTestingHEIC"
      ],
      "product_memberships" : [
        "SnapshotTestingStitch"
      ],
      "sources" : [
        "ImageFormat.swift",
        "Snapshotting.swift",
        "StitchStyle.swift",
        "StitchTask.swift",
        "Stitcher.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/alexey1312/SnapshotTestingHEIC.git
Fetching from https://github.com/pointfreeco/swift-snapshot-testing.git (cached)
Fetching from https://github.com/pointfreeco/swift-custom-dump (cached)
Fetching from https://github.com/swiftlang/swift-syntax (cached)
Fetching from https://github.com/pointfreeco/xctest-dynamic-overlay (cached)
Creating working copy of package ‘swift-custom-dump’
Checking out 1.3.3 of package ‘swift-custom-dump’
Creating working copy of package ‘xctest-dynamic-overlay’
Checking out 1.5.2 of package ‘xctest-dynamic-overlay’
Creating working copy of package ‘swift-snapshot-testing’
Checking out 1.18.3 of package ‘swift-snapshot-testing’
Creating working copy of package ‘SnapshotTestingHEIC’
Checking out 1.5.1 of package ‘SnapshotTestingHEIC’
Creating working copy of package ‘swift-syntax’
Checking out 601.0.1 of package ‘swift-syntax’
Resolve Package Graph
Resolved source packages:
  SnapshotTestingStitch: /Users/admin/builder/spi-builder-workspace
  swift-snapshot-testing: https://github.com/pointfreeco/swift-snapshot-testing.git @ 1.18.3
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 601.0.1
  swift-custom-dump: https://github.com/pointfreeco/swift-custom-dump @ 1.3.3
  SnapshotTestingHEIC: https://github.com/alexey1312/SnapshotTestingHEIC.git @ 1.5.1
  xctest-dynamic-overlay: https://github.com/pointfreeco/xctest-dynamic-overlay @ 1.5.2
resolved source packages: SnapshotTestingStitch, swift-snapshot-testing, swift-syntax, swift-custom-dump, SnapshotTestingHEIC, xctest-dynamic-overlay
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.8.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    },
    {
      "identity" : "snapshottestingheic",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/alexey1312/SnapshotTestingHEIC.git"
    }
  ],
  "manifest_display_name" : "SnapshotTestingStitch",
  "name" : "SnapshotTestingStitch",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "SnapshotTestingStitch",
      "targets" : [
        "SnapshotTestingStitch"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SnapshotTestingStitchTests",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitchTests",
      "path" : "Tests/SnapshotTestingStitchTests",
      "sources" : [
        "SnapshotTestingStitch.swift",
        "SnapshotTestingStitchHEIC.swift"
      ],
      "target_dependencies" : [
        "SnapshotTestingStitch"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SnapshotTestingStitch",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitch",
      "path" : "Sources/SnapshotTestingStitch",
      "product_dependencies" : [
        "SnapshotTesting",
        "SnapshotTestingHEIC"
      ],
      "product_memberships" : [
        "SnapshotTestingStitch"
      ],
      "sources" : [
        "ImageFormat.swift",
        "Snapshotting.swift",
        "StitchStyle.swift",
        "StitchTask.swift",
        "Stitcher.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "SnapshotTestingStitch"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SnapshotTestingStitch -destination platform=macOS,arch=arm64 OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme SnapshotTestingStitch -destination platform=macOS,arch=arm64 "OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
  SnapshotTestingHEIC: https://github.com/alexey1312/SnapshotTestingHEIC.git @ 1.5.1
  swift-custom-dump: https://github.com/pointfreeco/swift-custom-dump @ 1.3.3
  swift-snapshot-testing: https://github.com/pointfreeco/swift-snapshot-testing.git @ 1.18.3
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 601.0.1
  xctest-dynamic-overlay: https://github.com/pointfreeco/xctest-dynamic-overlay @ 1.5.2
  SnapshotTestingStitch: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (6 targets)
    Target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
    Target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
    Target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTesting' in project 'swift-snapshot-testing' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
ReadFileContents /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/docc/features.json
Build description signature: 95bf1e660cb0cfe2c20fa0fd10b0f89b
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/95bf1e660cb0cfe2c20fa0fd10b0f89b.xcbuilddata
error: The package product 'SnapshotTesting' requires minimum platform version 10.15 for the macOS platform, but this target supports 10.13 (in target 'SnapshotTestingStitch' from project 'SnapshotTestingStitch')
error: The package product 'SnapshotTestingHEIC' requires minimum platform version 10.15 for the macOS platform, but this target supports 10.13 (in target 'SnapshotTestingStitch' from project 'SnapshotTestingStitch')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme SnapshotTestingStitch
(1 failure)
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  SnapshotTestingStitch: /Users/admin/builder/spi-builder-workspace
  swift-custom-dump: https://github.com/pointfreeco/swift-custom-dump @ 1.3.3
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 601.0.1
  xctest-dynamic-overlay: https://github.com/pointfreeco/xctest-dynamic-overlay @ 1.5.2
  SnapshotTestingHEIC: https://github.com/alexey1312/SnapshotTestingHEIC.git @ 1.5.1
  swift-snapshot-testing: https://github.com/pointfreeco/swift-snapshot-testing.git @ 1.18.3
resolved source packages: SnapshotTestingStitch, swift-custom-dump, swift-syntax, xctest-dynamic-overlay, SnapshotTestingHEIC, swift-snapshot-testing
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.8.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    },
    {
      "identity" : "snapshottestingheic",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/alexey1312/SnapshotTestingHEIC.git"
    }
  ],
  "manifest_display_name" : "SnapshotTestingStitch",
  "name" : "SnapshotTestingStitch",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "SnapshotTestingStitch",
      "targets" : [
        "SnapshotTestingStitch"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SnapshotTestingStitchTests",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitchTests",
      "path" : "Tests/SnapshotTestingStitchTests",
      "sources" : [
        "SnapshotTestingStitch.swift",
        "SnapshotTestingStitchHEIC.swift"
      ],
      "target_dependencies" : [
        "SnapshotTestingStitch"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SnapshotTestingStitch",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitch",
      "path" : "Sources/SnapshotTestingStitch",
      "product_dependencies" : [
        "SnapshotTesting",
        "SnapshotTestingHEIC"
      ],
      "product_memberships" : [
        "SnapshotTestingStitch"
      ],
      "sources" : [
        "ImageFormat.swift",
        "Snapshotting.swift",
        "StitchStyle.swift",
        "StitchTask.swift",
        "Stitcher.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "SnapshotTestingStitch"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SnapshotTestingStitch -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme SnapshotTestingStitch -destination platform=macOS,arch=arm64
Resolve Package Graph
Resolved source packages:
  swift-custom-dump: https://github.com/pointfreeco/swift-custom-dump @ 1.3.3
  SnapshotTestingHEIC: https://github.com/alexey1312/SnapshotTestingHEIC.git @ 1.5.1
  SnapshotTestingStitch: /Users/admin/builder/spi-builder-workspace
  swift-snapshot-testing: https://github.com/pointfreeco/swift-snapshot-testing.git @ 1.18.3
  xctest-dynamic-overlay: https://github.com/pointfreeco/xctest-dynamic-overlay @ 1.5.2
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 601.0.1
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (6 targets)
    Target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
    Target 'SnapshotTestingStitch' in project 'SnapshotTestingStitch'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
    Target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTestingHEIC' in project 'SnapshotTestingHEIC'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTesting' in project 'swift-snapshot-testing'
        ➜ Explicit dependency on target 'SnapshotTesting' in project 'swift-snapshot-testing'
    Target 'SnapshotTesting' in project 'swift-snapshot-testing' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
ReadFileContents /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/docc/features.json
Build description signature: a39b942598275f45e7b3ec9599becc08
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/a39b942598275f45e7b3ec9599becc08.xcbuilddata
error: The package product 'SnapshotTesting' requires minimum platform version 10.15 for the macOS platform, but this target supports 10.13 (in target 'SnapshotTestingStitch' from project 'SnapshotTestingStitch')
error: The package product 'SnapshotTestingHEIC' requires minimum platform version 10.15 for the macOS platform, but this target supports 10.13 (in target 'SnapshotTestingStitch' from project 'SnapshotTestingStitch')
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:65c1c2ada7eba5c503a32988e72618e565c365d5, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme SnapshotTestingStitch
(1 failure)
BUILD FAILURE 6.1 macosXcodebuild