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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 Flow, reference 3.0.2 (fd755b), with Swift 6.0 for Linux on 21 Mar 2025 17:10:10 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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/tevelee/SwiftUI-Flow.git
Reference: 3.0.2
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/tevelee/SwiftUI-Flow
 * tag               3.0.2      -> FETCH_HEAD
HEAD is now at fd755bc Use older, compatible API
Cloned https://github.com/tevelee/SwiftUI-Flow.git
Revision (git rev-parse @):
fd755bc852c738d3b726c6a28fc4640c9a74876f
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/tevelee/SwiftUI-Flow.git at 3.0.2
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/tevelee/SwiftUI-Flow.git
https://github.com/tevelee/SwiftUI-Flow.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Flow",
  "name" : "Flow",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "16.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Flow",
      "targets" : [
        "Flow"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FlowTests",
      "module_type" : "SwiftTarget",
      "name" : "FlowTests",
      "path" : "Tests/FlowTests",
      "sources" : [
        "FlowTests.swift",
        "LineBreakingTests.swift",
        "Utils/Operators.swift",
        "Utils/TestSubview.swift"
      ],
      "target_dependencies" : [
        "Flow"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Flow",
      "module_type" : "SwiftTarget",
      "name" : "Flow",
      "path" : "Sources/Flow",
      "product_memberships" : [
        "Flow"
      ],
      "sources" : [
        "HFlow.swift",
        "HFlowLayout.swift",
        "Internal/Layout.swift",
        "Internal/LineBreaking.swift",
        "Internal/Protocols.swift",
        "Internal/Size.swift",
        "Internal/Utils.swift",
        "Support.swift",
        "VFlow.swift",
        "VFlowLayout.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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 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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/12] Compiling Flow VFlow.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[4/13] Compiling Flow VFlowLayout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[5/13] Compiling Flow Size.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[6/13] Compiling Flow Utils.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[7/13] Compiling Flow Support.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
error: emit-module command failed with exit code 1 (use -v to see invocation)
[8/13] Emitting module Flow
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[9/13] Compiling Flow Protocols.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[10/13] Compiling Flow HFlow.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[11/13] Compiling Flow HFlowLayout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[12/13] Compiling Flow Layout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[13/13] Compiling Flow LineBreaking.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/11] Compiling Flow Size.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[3/12] Compiling Flow Support.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[4/12] Compiling Flow Utils.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[5/12] Compiling Flow VFlow.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[6/12] Compiling Flow HFlow.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[7/12] Compiling Flow HFlowLayout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[8/12] Compiling Flow VFlowLayout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
error: emit-module command failed with exit code 1 (use -v to see invocation)
[9/12] Emitting module Flow
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[10/12] Compiling Flow Protocols.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[11/12] Compiling Flow Layout.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
[12/12] Compiling Flow LineBreaking.swift
/host/spi-builder-workspace/Sources/Flow/HFlow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 | /// A view that arranges its children in a horizontal flow layout.
BUILD FAILURE 6.0 linux