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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 MultiPicker, reference v2.0.2 (2201cb), with Swift 6.1 for Linux on 5 May 2025 05:53:00 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.3
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/toastersocks/MultiPicker.git
Reference: v2.0.2
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/toastersocks/MultiPicker
 * tag               v2.0.2     -> FETCH_HEAD
HEAD is now at 2201cb0 Fix errors building with Swift compiler versions < 6.0
Cloned https://github.com/toastersocks/MultiPicker.git
Revision (git rev-parse @):
2201cb04de77147778b351b71fcda030fb7ac6a2
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/toastersocks/MultiPicker.git at v2.0.2
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/toastersocks/MultiPicker.git
https://github.com/toastersocks/MultiPicker.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "helpers",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.0.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/toastersocks/Helpers.git"
    },
    {
      "identity" : "flow",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/toastersocks/Flow.git"
    }
  ],
  "manifest_display_name" : "MultiPicker",
  "name" : "MultiPicker",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "MultiPicker",
      "targets" : [
        "MultiPicker"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MultiPickerTests",
      "module_type" : "SwiftTarget",
      "name" : "MultiPickerTests",
      "path" : "Tests/MultiPickerTests",
      "sources" : [
        "MultiPickerTests.swift"
      ],
      "target_dependencies" : [
        "MultiPicker"
      ],
      "type" : "test"
    },
    {
      "c99name" : "MultiPicker",
      "module_type" : "SwiftTarget",
      "name" : "MultiPicker",
      "path" : "Sources/MultiPicker",
      "product_dependencies" : [
        "Helpers",
        "Flow"
      ],
      "product_memberships" : [
        "MultiPicker"
      ],
      "sources" : [
        "Development Assets/PreviewSupport.swift",
        "MultiPicker.swift",
        "SupportingTypes.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
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 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/toastersocks/Helpers.git
Fetching https://github.com/toastersocks/Flow.git
[1/109] Fetching helpers
[110/443] Fetching helpers, flow
Fetched https://github.com/toastersocks/Helpers.git from cache (0.20s)
Fetched https://github.com/toastersocks/Flow.git from cache (0.20s)
Computing version for https://github.com/toastersocks/Flow.git
Computed https://github.com/toastersocks/Flow.git at 1.2.3 (0.64s)
Computing version for https://github.com/toastersocks/Helpers.git
Computed https://github.com/toastersocks/Helpers.git at 0.7.0 (1.80s)
Creating working copy for https://github.com/toastersocks/Flow.git
Working copy of https://github.com/toastersocks/Flow.git resolved at 1.2.3
Creating working copy for https://github.com/toastersocks/Helpers.git
Working copy of https://github.com/toastersocks/Helpers.git resolved at 0.7.0
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/15] Compiling Flow SupportingTypes.swift
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 |
[6/15] Compiling Flow PreviewCode.swift
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 |
[7/15] Compiling Helpers Combine+.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[8/15] Emitting module Helpers
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[9/15] Compiling Helpers Variadic.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[10/15] Compiling Helpers PreviewHelpers.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[11/15] Compiling Helpers Extensions.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[12/15] Compiling Helpers Backport.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[13/15] Compiling Helpers Backports.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[14/15] Emitting module Flow
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  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 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
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/12] Emitting module Helpers
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[3/12] Compiling Helpers Variadic.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[4/12] Compiling Helpers Extensions.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[5/12] Compiling Helpers PreviewHelpers.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[6/12] Compiling Helpers Backports.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[7/12] Compiling Helpers Combine+.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
[8/12] Compiling Helpers Backport.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
 6 | //
 7 |
 8 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 9 |
10 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[9/12] Emitting module Flow
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
  1 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  2 |
  3 |
BUILD FAILURE 6.1 linux