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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 main (92fa44), with Swift 6.1 for Linux on 27 Apr 2025 19:07:51 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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: main
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
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 92fa44d Fixes renaming (#29)
Cloned https://github.com/KS1019/Script.swift.git
Revision (git rev-parse @):
92fa44d2de25aed6cea98b4183a0eedfdf0e0bf3
SUCCESS checkout https://github.com/KS1019/Script.swift.git at main
========================================
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" : "Scripting",
      "targets" : [
        "Scripting"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ScriptingTests",
      "module_type" : "SwiftTarget",
      "name" : "ScriptingTests",
      "path" : "Tests/ScriptingTests",
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ScriptingTests/Fixtures/TESTING.md",
          "rule" : {
            "process" : {
            }
          }
        }
      ],
      "sources" : [
        "ScriptUnitTests.swift"
      ],
      "target_dependencies" : [
        "Scripting"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Scripting",
      "module_type" : "SwiftTarget",
      "name" : "Scripting",
      "path" : "Sources/Scripting",
      "product_dependencies" : [
        "ShellOut",
        "Files"
      ],
      "product_memberships" : [
        "Scripting"
      ],
      "sources" : [
        "ExeternalCommands.swift",
        "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-4606859-0":/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/ShellOut.git
Fetching https://github.com/JohnSundell/Files
[1/960] Fetching shellout
[328/2196] Fetching shellout, files
Fetched https://github.com/JohnSundell/ShellOut.git from cache (0.77s)
Fetched https://github.com/JohnSundell/Files from cache (0.81s)
Computing version for https://github.com/JohnSundell/ShellOut.git
Computed https://github.com/JohnSundell/ShellOut.git at 2.3.0 (3.19s)
Computing version for https://github.com/JohnSundell/Files
Computed https://github.com/JohnSundell/Files at 4.2.0 (0.58s)
Creating working copy for https://github.com/JohnSundell/Files
Working copy of https://github.com/JohnSundell/Files resolved at 4.2.0
Creating working copy for https://github.com/JohnSundell/ShellOut.git
Working copy of https://github.com/JohnSundell/ShellOut.git resolved at 2.3.0
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] Compiling Files Files.swift
[8/9] Emitting module Files
[11/18] Compiling Scripting Script+Data.swift
[12/18] Compiling Scripting Script+Comparable.swift
[13/18] Compiling Scripting SystemCall.swift
/host/spi-builder-workspace/Sources/Scripting/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
[14/18] Compiling Scripting ExeternalCommands.swift
[15/18] Emitting module Scripting
[16/18] Compiling Scripting Script+String.swift
[17/18] Compiling Scripting Script.swift
[18/18] Compiling Scripting Script+Files.swift
Build complete! (12.06s)
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" : "Scripting",
      "targets" : [
        "Scripting"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ScriptingTests",
      "module_type" : "SwiftTarget",
      "name" : "ScriptingTests",
      "path" : "Tests/ScriptingTests",
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ScriptingTests/Fixtures/TESTING.md",
          "rule" : {
            "process" : {
            }
          }
        }
      ],
      "sources" : [
        "ScriptUnitTests.swift"
      ],
      "target_dependencies" : [
        "Scripting"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Scripting",
      "module_type" : "SwiftTarget",
      "name" : "Scripting",
      "path" : "Sources/Scripting",
      "product_dependencies" : [
        "ShellOut",
        "Files"
      ],
      "product_memberships" : [
        "Scripting"
      ],
      "sources" : [
        "ExeternalCommands.swift",
        "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.