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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 Shift, reference main (4162aa), with Swift 6.0 for Linux on 20 Mar 2025 16:20:39 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/vinhnx/Shift.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/vinhnx/Shift
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 4162aab Merge pull request #16 from vinhnx/vinhnx-patch-2
Cloned https://github.com/vinhnx/Shift.git
Revision (git rev-parse @):
4162aab0e4096252c18fe4b01b4af23456a0f7bb
SUCCESS checkout https://github.com/vinhnx/Shift.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/vinhnx/Shift.git
https://github.com/vinhnx/Shift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-algorithms",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-algorithms"
    }
  ],
  "manifest_display_name" : "Shift",
  "name" : "Shift",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "macos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    }
  ],
  "products" : [
    {
      "name" : "Shift",
      "targets" : [
        "Shift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ShiftTests",
      "module_type" : "SwiftTarget",
      "name" : "ShiftTests",
      "path" : "Tests/ShiftTests",
      "sources" : [
        "EventKitWrapperTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Shift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Shift",
      "module_type" : "SwiftTarget",
      "name" : "Shift",
      "path" : "Sources/Shift",
      "product_dependencies" : [
        "Algorithms"
      ],
      "product_memberships" : [
        "Shift"
      ],
      "sources" : [
        "Shift.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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 -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-6.0-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
Fetching https://github.com/apple/swift-algorithms
[1/5863] Fetching swift-algorithms
Fetched https://github.com/apple/swift-algorithms from cache (0.41s)
Computing version for https://github.com/apple/swift-algorithms
Computed https://github.com/apple/swift-algorithms at 1.2.1 (0.73s)
Fetching https://github.com/apple/swift-numerics.git
[1/5659] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics.git from cache (0.53s)
Computing version for https://github.com/apple/swift-numerics.git
Computed https://github.com/apple/swift-numerics.git at 1.0.3 (0.70s)
Creating working copy for https://github.com/apple/swift-numerics.git
Working copy of https://github.com/apple/swift-numerics.git resolved at 1.0.3
Creating working copy for https://github.com/apple/swift-algorithms
Working copy of https://github.com/apple/swift-algorithms resolved at 1.2.1
Building for debugging...
[0/5] Write sources
[3/5] Compiling _NumericsShims _NumericsShims.c
[4/5] Write swift-version-24593BA9C3E375BF.txt
[6/15] Compiling RealModule ElementaryFunctions.swift
[7/15] Compiling RealModule Float+Real.swift
[8/16] Compiling RealModule RealFunctions.swift
[9/16] Emitting module RealModule
[10/16] Compiling RealModule AugmentedArithmetic.swift
[11/16] Compiling RealModule Double+Real.swift
[12/16] Compiling RealModule AlgebraicField.swift
[13/16] Compiling RealModule ApproximateEquality.swift
[14/16] Compiling RealModule Float80+Real.swift
[15/16] Compiling RealModule Float16+Real.swift
[16/16] Compiling RealModule Real.swift
[18/42] Compiling Algorithms RandomSample.swift
[19/42] Compiling Algorithms Reductions.swift
[20/42] Compiling Algorithms Rotate.swift
[21/45] Compiling Algorithms Partition.swift
[22/45] Compiling Algorithms Permutations.swift
[23/45] Compiling Algorithms Product.swift
[24/45] Compiling Algorithms Compacted.swift
[25/45] Compiling Algorithms Cycle.swift
[26/45] Compiling Algorithms EitherSequence.swift
[27/45] Compiling Algorithms FirstNonNil.swift
[28/45] Compiling Algorithms Joined.swift
[29/45] Compiling Algorithms Keyed.swift
[30/45] Compiling Algorithms MinMax.swift
[31/45] Compiling Algorithms Split.swift
[32/45] Compiling Algorithms Stride.swift
[33/45] Compiling Algorithms Suffix.swift
[34/45] Compiling Algorithms FlattenCollection.swift
[35/45] Compiling Algorithms Grouped.swift
[36/45] Compiling Algorithms Indexed.swift
[37/45] Compiling Algorithms Intersperse.swift
[38/45] Compiling Algorithms Trim.swift
[39/45] Compiling Algorithms Unique.swift
[40/45] Compiling Algorithms Windows.swift
[41/45] Compiling Algorithms AdjacentPairs.swift
[42/45] Compiling Algorithms Chain.swift
[43/45] Compiling Algorithms Chunked.swift
[44/45] Compiling Algorithms Combinations.swift
[45/45] Emitting module Algorithms
error: emit-module command failed with exit code 1 (use -v to see invocation)
[47/48] Emitting module Shift
/host/spi-builder-workspace/Sources/Shift/Shift.swift:8:8: error: no such module 'SwiftUI'
  6 |
  7 | import Foundation
  8 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  9 | import EventKit
 10 | import Algorithms
[48/48] Compiling Shift Shift.swift
/host/spi-builder-workspace/Sources/Shift/Shift.swift:8:8: error: no such module 'SwiftUI'
  6 |
  7 | import Foundation
  8 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  9 | import EventKit
 10 | import Algorithms
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 RealModule Real.swift
[3/12] Compiling RealModule Float80+Real.swift
[4/12] Compiling RealModule ElementaryFunctions.swift
[5/12] Compiling RealModule Float+Real.swift
[6/12] Compiling RealModule Float16+Real.swift
[7/12] Compiling RealModule AugmentedArithmetic.swift
[8/12] Compiling RealModule Double+Real.swift
[9/12] Compiling RealModule RealFunctions.swift
[10/12] Compiling RealModule AlgebraicField.swift
[11/12] Compiling RealModule ApproximateEquality.swift
[12/12] Emitting module RealModule
[14/38] Compiling Algorithms Split.swift
[15/38] Compiling Algorithms Stride.swift
[16/38] Compiling Algorithms Suffix.swift
[17/41] Compiling Algorithms Partition.swift
[18/41] Compiling Algorithms Permutations.swift
[19/41] Compiling Algorithms Product.swift
[20/41] Compiling Algorithms AdjacentPairs.swift
[21/41] Compiling Algorithms Chain.swift
[22/41] Compiling Algorithms Chunked.swift
[23/41] Compiling Algorithms Combinations.swift
[24/41] Compiling Algorithms FlattenCollection.swift
[25/41] Compiling Algorithms Grouped.swift
[26/41] Compiling Algorithms Indexed.swift
[27/41] Compiling Algorithms Intersperse.swift
[28/41] Compiling Algorithms RandomSample.swift
[29/41] Compiling Algorithms Reductions.swift
[30/41] Compiling Algorithms Rotate.swift
[31/41] Compiling Algorithms Trim.swift
[32/41] Compiling Algorithms Unique.swift
[33/41] Compiling Algorithms Windows.swift
[34/41] Compiling Algorithms Joined.swift
[35/41] Compiling Algorithms Keyed.swift
[36/41] Compiling Algorithms MinMax.swift
[37/41] Compiling Algorithms Compacted.swift
[38/41] Compiling Algorithms Cycle.swift
[39/41] Compiling Algorithms EitherSequence.swift
[40/41] Compiling Algorithms FirstNonNil.swift
[41/41] Emitting module Algorithms
error: emit-module command failed with exit code 1 (use -v to see invocation)
[43/44] Emitting module Shift
/host/spi-builder-workspace/Sources/Shift/Shift.swift:8:8: error: no such module 'SwiftUI'
  6 |
  7 | import Foundation
  8 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  9 | import EventKit
 10 | import Algorithms
[44/44] Compiling Shift Shift.swift
/host/spi-builder-workspace/Sources/Shift/Shift.swift:8:8: error: no such module 'SwiftUI'
  6 |
  7 | import Foundation
  8 | import SwiftUI
    |        `- error: no such module 'SwiftUI'
  9 | import EventKit
 10 | import Algorithms
BUILD FAILURE 6.0 linux