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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 Script.swift, reference 0.0.3 (f9e476), with Swift 6.1 for Linux on 27 Apr 2025 19:10:02 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/KS1019/Script.swift.git
Reference: 0.0.3
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/KS1019/Script.swift
 * tag               0.0.3      -> FETCH_HEAD
HEAD is now at f9e4760 Update .spi.yml (#5)
Cloned https://github.com/KS1019/Script.swift.git
Revision (git rev-parse @):
f9e47607d95a7ec7dbfee0e266d4cee22ba8b86f
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/KS1019/Script.swift.git at 0.0.3
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/KS1019/Script.swift.git
https://github.com/KS1019/Script.swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "shellout",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/JohnSundell/ShellOut.git"
    },
    {
      "identity" : "files",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.0.0",
            "upper_bound" : "5.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/JohnSundell/Files"
    }
  ],
  "manifest_display_name" : "Script.swift",
  "name" : "Script.swift",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "ScriptSwift",
      "targets" : [
        "ScriptSwift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ScriptSwiftTests",
      "module_type" : "SwiftTarget",
      "name" : "ScriptSwiftTests",
      "path" : "Tests/ScriptSwiftTests",
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ScriptSwiftTests/Fixtures/TESTING.md",
          "rule" : {
            "process" : {
            }
          }
        }
      ],
      "sources" : [
        "ScriptUnitTests.swift"
      ],
      "target_dependencies" : [
        "ScriptSwift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ScriptSwift",
      "module_type" : "SwiftTarget",
      "name" : "ScriptSwift",
      "path" : "Sources/ScriptSwift",
      "product_dependencies" : [
        "ShellOut",
        "Files"
      ],
      "product_memberships" : [
        "ScriptSwift"
      ],
      "sources" : [
        "Script+Comparable.swift",
        "Script+Data.swift",
        "Script+Files.swift",
        "Script+String.swift",
        "Script.swift",
        "SystemCall.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-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-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Fetching https://github.com/JohnSundell/Files
Fetching https://github.com/JohnSundell/ShellOut.git
[1/960] Fetching shellout
[961/2196] Fetching shellout, files
Fetched https://github.com/JohnSundell/ShellOut.git from cache (0.20s)
Fetched https://github.com/JohnSundell/Files from cache (0.20s)
Computing version for https://github.com/JohnSundell/ShellOut.git
Computed https://github.com/JohnSundell/ShellOut.git at 2.3.0 (2.01s)
Computing version for https://github.com/JohnSundell/Files
Computed https://github.com/JohnSundell/Files at 4.2.0 (0.45s)
Creating working copy for https://github.com/JohnSundell/ShellOut.git
Working copy of https://github.com/JohnSundell/ShellOut.git resolved at 2.3.0
Creating working copy for https://github.com/JohnSundell/Files
Working copy of https://github.com/JohnSundell/Files resolved at 4.2.0
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/8] Emitting module ShellOut
[6/8] Compiling ShellOut ShellOut.swift
[7/9] Emitting module Files
[8/9] Compiling Files Files.swift
[11/17] Compiling ScriptSwift Script+Data.swift
[12/17] Compiling ScriptSwift Script+Comparable.swift
[13/17] Emitting module ScriptSwift
[14/17] Compiling ScriptSwift Script+Files.swift
[15/17] Compiling ScriptSwift SystemCall.swift
/host/spi-builder-workspace/Sources/ScriptSwift/SystemCall.swift:17:39: warning: reference to var 'stderr' is not concurrency-safe because it involves shared mutable state; this is an error in the Swift 6 language mode
15 |     }
16 |
17 |     fputs(error.localizedDescription, stderr)
   |                                       `- warning: reference to var 'stderr' is not concurrency-safe because it involves shared mutable state; this is an error in the Swift 6 language mode
18 |     _exit(1)
19 | }
/usr/include/stdio.h:145:14: note: var declared here
143 | extern FILE *stdin;		/* Standard input stream.  */
144 | extern FILE *stdout;		/* Standard output stream.  */
145 | extern FILE *stderr;		/* Standard error output stream.  */
    |              `- note: var declared here
146 | /* C89/C99 say they're macros.  Make them happy.  */
147 | #define stdin stdin
[16/17] Compiling ScriptSwift Script.swift
[17/17] Compiling ScriptSwift Script+String.swift
Build complete! (9.06s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "shellout",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/JohnSundell/ShellOut.git"
    },
    {
      "identity" : "files",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.0.0",
            "upper_bound" : "5.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/JohnSundell/Files"
    }
  ],
  "manifest_display_name" : "Script.swift",
  "name" : "Script.swift",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "ScriptSwift",
      "targets" : [
        "ScriptSwift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ScriptSwiftTests",
      "module_type" : "SwiftTarget",
      "name" : "ScriptSwiftTests",
      "path" : "Tests/ScriptSwiftTests",
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ScriptSwiftTests/Fixtures/TESTING.md",
          "rule" : {
            "process" : {
            }
          }
        }
      ],
      "sources" : [
        "ScriptUnitTests.swift"
      ],
      "target_dependencies" : [
        "ScriptSwift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ScriptSwift",
      "module_type" : "SwiftTarget",
      "name" : "ScriptSwift",
      "path" : "Sources/ScriptSwift",
      "product_dependencies" : [
        "ShellOut",
        "Files"
      ],
      "product_memberships" : [
        "ScriptSwift"
      ],
      "sources" : [
        "Script+Comparable.swift",
        "Script+Data.swift",
        "Script+Files.swift",
        "Script+String.swift",
        "Script.swift",
        "SystemCall.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.