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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 CombineMIDI, reference main (c044ae), with Swift 6.1 for Linux on 26 Apr 2025 19:38:49 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/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/mkj-is/CombineMIDI.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/mkj-is/CombineMIDI
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at c044ae3 Release version 0.3.0 and update README examples
Cloned https://github.com/mkj-is/CombineMIDI.git
Revision (git rev-parse @):
c044ae3f65f14f27b2842908ef3eb550e2782bff
SUCCESS checkout https://github.com/mkj-is/CombineMIDI.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/mkj-is/CombineMIDI.git
https://github.com/mkj-is/CombineMIDI.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CombineMIDI",
  "name" : "CombineMIDI",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "CombineMIDI",
      "targets" : [
        "CombineMIDI"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CombineMIDITests",
      "module_type" : "SwiftTarget",
      "name" : "CombineMIDITests",
      "path" : "Tests/CombineMIDITests",
      "sources" : [
        "MemoryTests.swift"
      ],
      "target_dependencies" : [
        "CombineMIDI"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CombineMIDI",
      "module_type" : "SwiftTarget",
      "name" : "CombineMIDI",
      "path" : "Sources/CombineMIDI",
      "product_memberships" : [
        "CombineMIDI"
      ],
      "sources" : [
        "MIDI.swift",
        "MIDIClient.swift",
        "MIDIMessage.swift",
        "MIDIPublisher.swift",
        "MIDIStream.swift",
        "MIDISubscription.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/9] Compiling CombineMIDI MIDISubscription.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/9] Emitting module CombineMIDI
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[5/9] Compiling CombineMIDI MIDI.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[6/9] Compiling CombineMIDI MIDIMessage.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[7/9] Compiling CombineMIDI MIDIPublisher.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[8/9] Compiling CombineMIDI MIDIClient.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[9/9] Compiling CombineMIDI MIDIStream.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/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
[2/8] Compiling CombineMIDI MIDIPublisher.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[3/8] Compiling CombineMIDI MIDISubscription.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[4/8] Compiling CombineMIDI MIDIStream.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/8] Emitting module CombineMIDI
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[6/8] Compiling CombineMIDI MIDIClient.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[7/8] Compiling CombineMIDI MIDI.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
[8/8] Compiling CombineMIDI MIDIMessage.swift
/host/spi-builder-workspace/Sources/CombineMIDI/MIDI.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 | import Combine
 3 |
BUILD FAILURE 6.1 linux