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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 TLS, reference 3.0.0-rc.1.0.1 (cfd8cc), with Swift 6.1 for Linux on 25 Apr 2025 15:35:07 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/vapor-community/tls.git
Reference: 3.0.0-rc.1.0.1
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/vapor-community/tls
 * tag               3.0.0-rc.1.0.1 -> FETCH_HEAD
HEAD is now at cfd8cc0 remove extraneous print
Cloned https://github.com/vapor-community/tls.git
Revision (git rev-parse @):
cfd8cc0f06841ee15469c5fc98131e47511f8e94
SUCCESS checkout https://github.com/vapor-community/tls.git at 3.0.0-rc.1.0.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/vapor-community/tls.git
https://github.com/vapor-community/tls.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "async",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0-rc",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/async.git"
    },
    {
      "identity" : "core",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0-rc",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/core.git"
    },
    {
      "identity" : "sockets",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0-rc",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/sockets.git"
    },
    {
      "identity" : "copenssl",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0-rc",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/copenssl.git"
    }
  ],
  "manifest_display_name" : "TLS",
  "name" : "TLS",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "TLS",
      "targets" : [
        "TLS"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "OpenSSL",
      "targets" : [
        "OpenSSL"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TLSTests",
      "module_type" : "SwiftTarget",
      "name" : "TLSTests",
      "path" : "Tests/TLSTests",
      "sources" : [
        "HTTPSTests.swift",
        "Utitilies.swift"
      ],
      "target_dependencies" : [
        "OpenSSL",
        "TLS"
      ],
      "type" : "test"
    },
    {
      "c99name" : "TLS",
      "module_type" : "SwiftTarget",
      "name" : "TLS",
      "path" : "Sources/TLS",
      "product_dependencies" : [
        "Async",
        "Bits",
        "Debugging",
        "TCP"
      ],
      "product_memberships" : [
        "TLS",
        "OpenSSL"
      ],
      "sources" : [
        "PeerValidator.swift",
        "TLSClient.swift",
        "TLSServer.swift",
        "TLSSocket.swift",
        "TLSSocketSink.swift",
        "TLSSocketSource.swift",
        "TLSSocketStream.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "OpenSSL",
      "module_type" : "SwiftTarget",
      "name" : "OpenSSL",
      "path" : "Sources/OpenSSL",
      "product_dependencies" : [
        "Async",
        "COpenSSL",
        "Debugging"
      ],
      "product_memberships" : [
        "OpenSSL"
      ],
      "sources" : [
        "OpenSSLClient.swift",
        "OpenSSLError.swift",
        "OpenSSLMethod.swift",
        "OpenSSLServer.swift",
        "OpenSSLSocket.swift"
      ],
      "target_dependencies" : [
        "TLS"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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/vapor/async.git
Fetching https://github.com/vapor/sockets.git
Fetching https://github.com/vapor/core.git
Fetching https://github.com/vapor/copenssl.git
[1/2323] Fetching async
[2324/22466] Fetching async, core
[2325/22500] Fetching async, core, copenssl
[3769/25812] Fetching async, core, copenssl, sockets
Fetched https://github.com/vapor/copenssl.git from cache (0.40s)
Fetched https://github.com/vapor/async.git from cache (0.41s)
[19628/23455] Fetching core, sockets
Fetched https://github.com/vapor/sockets.git from cache (0.87s)
Fetched https://github.com/vapor/core.git from cache (0.88s)
Computing version for https://github.com/vapor/copenssl.git
Computed https://github.com/vapor/copenssl.git at 1.0.0-rc.1 (2.26s)
Computing version for https://github.com/vapor/sockets.git
Computed https://github.com/vapor/sockets.git at 3.0.0-rc.1 (0.57s)
Computing version for https://github.com/vapor/async.git
Computed https://github.com/vapor/async.git at 1.0.0-rc.1.1 (1.00s)
Fetching https://github.com/vapor/cepoll.git
[1/33] Fetching cepoll
Fetched https://github.com/vapor/cepoll.git from cache (0.36s)
Computing version for https://github.com/vapor/cepoll.git
error: the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 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
Updating https://github.com/vapor/sockets.git
Updating https://github.com/vapor/core.git
Updating https://github.com/vapor/async.git
Updating https://github.com/vapor/copenssl.git
Updated https://github.com/vapor/copenssl.git (0.17s)
Updated https://github.com/vapor/core.git (0.23s)
Updated https://github.com/vapor/sockets.git (0.23s)
Updated https://github.com/vapor/async.git (0.23s)
Computing version for https://github.com/vapor/copenssl.git
Computed https://github.com/vapor/copenssl.git at 1.0.0-rc.1 (0.70s)
Computing version for https://github.com/vapor/sockets.git
Computed https://github.com/vapor/sockets.git at 3.0.0-rc.1 (0.50s)
Computing version for https://github.com/vapor/async.git
Computed https://github.com/vapor/async.git at 1.0.0-rc.1.1 (0.92s)
Updating https://github.com/vapor/cepoll.git
Updated https://github.com/vapor/cepoll.git (0.12s)
Computing version for https://github.com/vapor/cepoll.git
error: the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
BUILD FAILURE 6.1 linux