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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 skip-foundation, reference 1.3.3 (1f3aa5), with Swift 6.0 for Linux on 27 Mar 2025 23:01:45 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/skiptools/skip-foundation.git
Reference: 1.3.3
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/skiptools/skip-foundation
 * tag               1.3.3      -> FETCH_HEAD
HEAD is now at 1f3aa51
Cloned https://github.com/skiptools/skip-foundation.git
Revision (git rev-parse @):
1f3aa51ed5cff2c62f1e6a22a44c61198deefa5c
SUCCESS checkout https://github.com/skiptools/skip-foundation.git at 1.3.3
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/skiptools/skip-foundation.git
https://github.com/skiptools/skip-foundation.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "default_localization" : "en",
  "dependencies" : [
    {
      "identity" : "skip",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.33",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://source.skip.tools/skip.git"
    },
    {
      "identity" : "skip-lib",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.3.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://source.skip.tools/skip-lib.git"
    }
  ],
  "manifest_display_name" : "skip-foundation",
  "name" : "skip-foundation",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "16.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "16.0"
    }
  ],
  "products" : [
    {
      "name" : "SkipFoundation",
      "targets" : [
        "SkipFoundation"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SkipFoundationTests",
      "module_type" : "SwiftTarget",
      "name" : "SkipFoundationTests",
      "path" : "Tests/SkipFoundationTests",
      "product_dependencies" : [
        "SkipTest",
        "skipstone"
      ],
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/Localizable.xcstrings",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSString-ISO-8859-1-data.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSString-UTF16-BE-data.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSString-UTF16-LE-data.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSString-UTF32-BE-data.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSString-UTF32-LE-data.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSStringTestData.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSURLTestData.plist",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSXMLDTDTestData.xml",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/NSXMLDocumentTestData.xml",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/PropertyList-1.0.dtd",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/SampleInfo.plist",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/Test.plist",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/TestFileWithZeros.txt",
          "rule" : {
            "process" : {
            }
          }
        },
        {
          "path" : "/host/spi-builder-workspace/Tests/SkipFoundationTests/Resources/textasset.txt",
          "rule" : {
            "process" : {
            }
          }
        }
      ],
      "sources" : [
        "CoreLibs/TestAffineTransform.swift",
        "CoreLibs/TestCharacterSet.swift",
        "CoreLibs/TestCodable.swift",
        "CoreLibs/TestDecimal.swift",
        "CoreLibs/TestIndexPath.swift",
        "CoreLibs/TestIndexSet.swift",
        "CoreLibs/TestPersonNameComponents.swift",
        "CoreLibs/TestUUID.swift",
        "CoreLibs/TestUserDefaults.swift",
        "CoreLibs/TestUtils.swift",
        "DateTime/TestCalendar.swift",
        "DateTime/TestDate.swift",
        "DateTime/TestDateComponents.swift",
        "DateTime/TestDateInterval.swift",
        "DateTime/TestTimeZone.swift",
        "Formats/TestAttributedString.swift",
        "Formats/TestAttributedStringCOW.swift",
        "Formats/TestAttributedStringPerformance.swift",
        "Formats/TestAttributedStringSupport.swift",
        "Formats/TestJSONEncoder.swift",
        "Formats/TestJSONSerialization.swift",
        "Formats/TestMarkdown.swift",
        "Formats/TestPropertyListEncoder.swift",
        "Formats/TestPropertyListSerialization.swift",
        "Formats/TestScanner.swift",
        "Formats/TestXMLDocument.swift",
        "Formats/TestXMLParser.swift",
        "Formatters/TestByteCountFormatter.swift",
        "Formatters/TestDateFormatter.swift",
        "Formatters/TestDateIntervalFormatter.swift",
        "Formatters/TestEnergyFormatter.swift",
        "Formatters/TestISO8601DateFormatter.swift",
        "Formatters/TestLengthFormatter.swift",
        "Formatters/TestMassFormatter.swift",
        "Formatters/TestNumberFormatter.swift",
        "Formatters/TestRelativeDateTimeFormatter.swift",
        "Foundation/BundleTests.swift",
        "Foundation/CurrencyTests.swift",
        "Foundation/DataTests.swift",
        "Foundation/DateTests.swift",
        "Foundation/DigestTests.swift",
        "Foundation/FileManagerTests.swift",
        "Foundation/FixtureValues.swift",
        "Foundation/JSONTests.swift",
        "Foundation/LocaleTests.swift",
        "Foundation/LoggerTests.swift",
        "Foundation/URLTests.swift",
        "Foundation/UUIDTests.swift",
        "Foundation/Utilities.swift",
        "Network/TestCachedURLResponse.swift",
        "Network/TestDataURLProtocol.swift",
        "Network/TestHTTPCookie.swift",
        "Network/TestHTTPCookieStorage.swift",
        "Network/TestHTTPURLResponse.swift",
        "Network/TestHost.swift",
        "Network/TestSocketPort.swift",
        "Network/TestURL.swift",
        "Network/TestURLCache.swift",
        "Network/TestURLComponents.swift",
        "Network/TestURLCredential.swift",
        "Network/TestURLCredentialStorage.swift",
        "Network/TestURLProtectionSpace.swift",
        "Network/TestURLProtocol.swift",
        "Network/TestURLRequest.swift",
        "Network/TestURLResponse.swift",
        "Network/TestURLSession.swift",
        "Network/TestURLSessionFTP.swift",
        "Shims.swift",
        "SkipFoundationTests.swift",
        "System/TestBundle.swift",
        "System/TestFileHandle.swift",
        "System/TestFileManager.swift",
        "System/TestNotification.swift",
        "System/TestNotificationCenter.swift",
        "System/TestNotificationQueue.swift",
        "System/TestOperationQueue.swift",
        "System/TestPipe.swift",
        "System/TestProcess.swift",
        "System/TestProcessInfo.swift",
        "System/TestProgress.swift",
        "System/TestRunLoop.swift",
        "System/TestStream.swift",
        "System/TestThread.swift",
        "System/TestTimer.swift",
        "Units/TestDimension.swift",
        "Units/TestMeasurement.swift",
        "Units/TestUnit.swift",
        "Units/TestUnitConverter.swift",
        "Units/TestUnitInformationStorage.swift",
        "Units/TestUnitVolume.swift",
        "XCSkipTests.swift"
      ],
      "target_dependencies" : [
        "SkipFoundation"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SkipFoundation",
      "module_type" : "SwiftTarget",
      "name" : "SkipFoundation",
      "path" : "Sources/SkipFoundation",
      "product_dependencies" : [
        "SkipLib",
        "skipstone"
      ],
      "product_memberships" : [
        "SkipFoundation"
      ],
      "sources" : [
        "AttributedString.swift",
        "Bundle.swift",
        "Calendar.swift",
        "CharacterSet.swift",
        "ComparisonResult.swift",
        "Data.swift",
        "Date.swift",
        "DateComponents.swift",
        "DateComponentsFormatter.swift",
        "DateFormatter.swift",
        "DateInterval.swift",
        "DateIntervalFormatter.swift",
        "Digest.swift",
        "Dispatch.swift",
        "FileManager.swift",
        "Formatter.swift",
        "HTTPURLResponse.swift",
        "ISO8601DateFormatter.swift",
        "IndexPath.swift",
        "IndexSet.swift",
        "JSONDecoder.swift",
        "JSONEncoder.swift",
        "JSONSerialization+Parser.swift",
        "JSONSerialization.swift",
        "Locale.swift",
        "LocalizedStringResource.swift",
        "Logger.swift",
        "MarkdownNode.swift",
        "NSError.swift",
        "NSLock.swift",
        "NotificationCenter.swift",
        "Number.swift",
        "NumberFormatter.swift",
        "OSAllocatedUnfairLock.swift",
        "OperationQueue.swift",
        "ProcessInfo.swift",
        "PropertyListSerialization.swift",
        "RelativeDateTimeFormatter.swift",
        "Scanner.swift",
        "SkipFoundation.swift",
        "String.swift",
        "StringEncoding.swift",
        "StringLocalizationValue.swift",
        "Thread.swift",
        "TimeZone.swift",
        "Timer.swift",
        "URL.swift",
        "URLComponents.swift",
        "URLRequest.swift",
        "URLResponse.swift",
        "URLSession.swift",
        "URLSessionConfiguration.swift",
        "URLSessionTask.swift",
        "UUID.swift",
        "Unicode.swift",
        "UserDefaults.swift",
        "XMLParser.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:081dcf4fb829aea9d08447f4790431afbdfbcc335bfeed728ca69c6f181ae2aa
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Fetching https://source.skip.tools/skip.git
Fetching https://source.skip.tools/skip-lib.git
[1/1410] Fetching skip-lib
[1411/8970] Fetching skip-lib, skip
Fetched https://source.skip.tools/skip-lib.git from cache (0.94s)
Fetched https://source.skip.tools/skip.git from cache (0.96s)
Computing version for https://source.skip.tools/skip-lib.git
Computed https://source.skip.tools/skip-lib.git at 1.3.4 (0.96s)
Fetching https://source.skip.tools/skip-unit.git
[1/853] Fetching skip-unit
Fetched https://source.skip.tools/skip-unit.git from cache (0.49s)
Computing version for https://source.skip.tools/skip-unit.git
Computed https://source.skip.tools/skip-unit.git at 1.1.2 (0.77s)
Computing version for https://source.skip.tools/skip.git
Computed https://source.skip.tools/skip.git at 1.3.9 (2.25s)
Creating working copy for https://source.skip.tools/skip.git
Working copy of https://source.skip.tools/skip.git resolved at 1.3.9
Creating working copy for https://source.skip.tools/skip-lib.git
Working copy of https://source.skip.tools/skip-lib.git resolved at 1.3.4
Creating working copy for https://source.skip.tools/skip-unit.git
Working copy of https://source.skip.tools/skip-unit.git resolved at 1.1.2
[2747/15780999] Downloading https://source.skip.tools/skip/releases/download/1.3.9/skip.zip
Downloading binary artifact https://source.skip.tools/skip/releases/download/1.3.9/skip.zip
Downloaded https://source.skip.tools/skip/releases/download/1.3.9/skip.zip (1.94s)
error: Tool ‘skip’ is not supported on the target platform
error: build stopped due to build-tool plugin failures
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:081dcf4fb829aea9d08447f4790431afbdfbcc335bfeed728ca69c6f181ae2aa
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
error: Tool ‘skip’ is not supported on the target platform
error: build stopped due to build-tool plugin failures
BUILD FAILURE 6.0 linux