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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 SnapshotTestingStitch, reference main (a1c51a), with Swift 6.1 for Linux on 26 Apr 2025 19:13:47 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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/sherlouk/swift-snapshot-testing-stitch.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/sherlouk/swift-snapshot-testing-stitch
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a1c51ab Merge pull request #11 from MojtabaHs/docs/fix-typos
Cloned https://github.com/sherlouk/swift-snapshot-testing-stitch.git
Revision (git rev-parse @):
a1c51ab705388cecee16ab80f6e0f4d1623595b1
SUCCESS checkout https://github.com/sherlouk/swift-snapshot-testing-stitch.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/sherlouk/swift-snapshot-testing-stitch.git
https://github.com/sherlouk/swift-snapshot-testing-stitch.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.10.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    },
    {
      "identity" : "snapshottestingheic",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/alexey1312/SnapshotTestingHEIC.git"
    }
  ],
  "manifest_display_name" : "SnapshotTestingStitch",
  "name" : "SnapshotTestingStitch",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "SnapshotTestingStitch",
      "targets" : [
        "SnapshotTestingStitch"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SnapshotTestingStitchTests",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitchTests",
      "path" : "Tests/SnapshotTestingStitchTests",
      "sources" : [
        "SnapshotTestingStitch.swift",
        "SnapshotTestingStitchHEIC.swift"
      ],
      "target_dependencies" : [
        "SnapshotTestingStitch"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SnapshotTestingStitch",
      "module_type" : "SwiftTarget",
      "name" : "SnapshotTestingStitch",
      "path" : "Sources/SnapshotTestingStitch",
      "product_dependencies" : [
        "SnapshotTesting",
        "SnapshotTestingHEIC"
      ],
      "product_memberships" : [
        "SnapshotTestingStitch"
      ],
      "sources" : [
        "ImageFormat.swift",
        "Snapshotting.swift",
        "StitchStyle.swift",
        "StitchTask.swift",
        "Stitcher.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
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 -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/pointfreeco/swift-snapshot-testing.git
Fetching https://github.com/alexey1312/SnapshotTestingHEIC.git
[1/200] Fetching snapshottestingheic
[201/13359] Fetching snapshottestingheic, swift-snapshot-testing
Fetched https://github.com/alexey1312/SnapshotTestingHEIC.git from cache (1.54s)
Fetched https://github.com/pointfreeco/swift-snapshot-testing.git from cache (1.60s)
Computing version for https://github.com/alexey1312/SnapshotTestingHEIC.git
Computed https://github.com/alexey1312/SnapshotTestingHEIC.git at 1.5.1 (2.06s)
Computing version for https://github.com/pointfreeco/swift-snapshot-testing.git
Computed https://github.com/pointfreeco/swift-snapshot-testing.git at 1.18.3 (0.45s)
Fetching https://github.com/swiftlang/swift-syntax
Fetching https://github.com/pointfreeco/swift-custom-dump
[1/4581] Fetching swift-custom-dump
[4582/74813] Fetching swift-custom-dump, swift-syntax
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (3.68s)
Fetched https://github.com/swiftlang/swift-syntax from cache (3.73s)
Computing version for https://github.com/pointfreeco/swift-custom-dump
Computed https://github.com/pointfreeco/swift-custom-dump at 1.3.3 (4.15s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay
[1/5388] Fetching xctest-dynamic-overlay
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.56s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 601.0.1 (1.15s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.5.2 (0.41s)
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.5.2
Creating working copy for https://github.com/pointfreeco/swift-snapshot-testing.git
Working copy of https://github.com/pointfreeco/swift-snapshot-testing.git resolved at 1.18.3
Creating working copy for https://github.com/alexey1312/SnapshotTestingHEIC.git
Working copy of https://github.com/alexey1312/SnapshotTestingHEIC.git resolved at 1.5.1
Creating working copy for https://github.com/pointfreeco/swift-custom-dump
Working copy of https://github.com/pointfreeco/swift-custom-dump resolved at 1.3.3
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 601.0.1
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/35] Emitting module SnapshotTesting
[6/39] Compiling SnapshotTesting NSImage.swift
[7/39] Compiling SnapshotTesting NSView.swift
[8/39] Compiling SnapshotTesting NSViewController.swift
[9/39] Compiling SnapshotTesting SceneKit.swift
[10/39] Compiling SnapshotTesting View.swift
[11/39] Compiling SnapshotTesting XCTAttachment.swift
[12/39] Compiling SnapshotTesting Diff.swift
[13/39] Compiling SnapshotTesting Diffing.swift
[14/39] Compiling SnapshotTesting Wait.swift
[15/39] Compiling SnapshotTesting Deprecations.swift
[16/39] Compiling SnapshotTesting RecordIssue.swift
[17/39] Compiling SnapshotTesting SnapshotTestingConfiguration.swift
[18/39] Compiling SnapshotTesting SnapshotsTestTrait.swift
[19/39] Compiling SnapshotTesting CaseIterable.swift
[20/39] Compiling SnapshotTesting Data.swift
[21/39] Compiling SnapshotTesting Encodable.swift
[22/39] Compiling SnapshotTesting NSBezierPath.swift
[23/39] Compiling SnapshotTesting UIImage.swift
[24/39] Compiling SnapshotTesting UIView.swift
[25/39] Compiling SnapshotTesting UIViewController.swift
[26/39] Compiling SnapshotTesting URLRequest.swift
[27/39] Compiling SnapshotTesting SpriteKit.swift
[28/39] Compiling SnapshotTesting String.swift
[29/39] Compiling SnapshotTesting SwiftUIView.swift
[30/39] Compiling SnapshotTesting UIBezierPath.swift
[31/39] Compiling SnapshotTesting Snapshotting.swift
[32/39] Compiling SnapshotTesting Any.swift
[33/39] Compiling SnapshotTesting CALayer.swift
[34/39] Compiling SnapshotTesting CGPath.swift
[35/39] Compiling SnapshotTesting AssertSnapshot.swift
[36/39] Compiling SnapshotTesting Async.swift
[37/39] Compiling SnapshotTesting Internal.swift
[38/39] Compiling SnapshotTesting PlistEncoder.swift
[39/39] Compiling SnapshotTesting String+SpecialCharacters.swift
[41/50] Compiling SnapshotTestingHEIC NSViewController.swift
[42/50] Compiling SnapshotTestingHEIC SwiftUIView.swift
[43/51] Compiling SnapshotTestingHEIC UIImage.swift
[44/51] Compiling SnapshotTestingHEIC UIView.swift
[45/51] Compiling SnapshotTestingHEIC UIImage+HEIC.swift
[46/51] Compiling SnapshotTestingHEIC NSImage.swift
[47/51] Emitting module SnapshotTestingHEIC
[48/51] Compiling SnapshotTestingHEIC NSView.swift
[49/51] Compiling SnapshotTestingHEIC CompressionQuality.swift
[50/51] Compiling SnapshotTestingHEIC NSImage+HEIC.swift
[51/51] Compiling SnapshotTestingHEIC UIViewController.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[53/58] Emitting module SnapshotTestingStitch
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[54/58] Compiling SnapshotTestingStitch ImageFormat.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[55/58] Compiling SnapshotTestingStitch StitchStyle.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[56/58] Compiling SnapshotTestingStitch Snapshotting.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[57/58] Compiling SnapshotTestingStitch Stitcher.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[58/58] Compiling SnapshotTestingStitch StitchTask.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
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
[2/32] Compiling SnapshotTesting SpriteKit.swift
[3/32] Compiling SnapshotTesting String.swift
[4/32] Compiling SnapshotTesting SwiftUIView.swift
[5/32] Compiling SnapshotTesting UIBezierPath.swift
[6/36] Compiling SnapshotTesting View.swift
[7/36] Compiling SnapshotTesting XCTAttachment.swift
[8/36] Compiling SnapshotTesting Diff.swift
[9/36] Compiling SnapshotTesting Diffing.swift
[10/36] Compiling SnapshotTesting Wait.swift
[11/36] Compiling SnapshotTesting UIImage.swift
[12/36] Compiling SnapshotTesting UIView.swift
[13/36] Compiling SnapshotTesting UIViewController.swift
[14/36] Compiling SnapshotTesting URLRequest.swift
[15/36] Emitting module SnapshotTesting
[16/36] Compiling SnapshotTesting NSImage.swift
[17/36] Compiling SnapshotTesting NSView.swift
[18/36] Compiling SnapshotTesting NSViewController.swift
[19/36] Compiling SnapshotTesting SceneKit.swift
[20/36] Compiling SnapshotTesting CaseIterable.swift
[21/36] Compiling SnapshotTesting Data.swift
[22/36] Compiling SnapshotTesting Encodable.swift
[23/36] Compiling SnapshotTesting NSBezierPath.swift
[24/36] Compiling SnapshotTesting Snapshotting.swift
[25/36] Compiling SnapshotTesting Any.swift
[26/36] Compiling SnapshotTesting CALayer.swift
[27/36] Compiling SnapshotTesting CGPath.swift
[28/36] Compiling SnapshotTesting Deprecations.swift
[29/36] Compiling SnapshotTesting RecordIssue.swift
[30/36] Compiling SnapshotTesting SnapshotTestingConfiguration.swift
[31/36] Compiling SnapshotTesting SnapshotsTestTrait.swift
[32/36] Compiling SnapshotTesting AssertSnapshot.swift
[33/36] Compiling SnapshotTesting Async.swift
[34/36] Compiling SnapshotTesting Internal.swift
[35/36] Compiling SnapshotTesting PlistEncoder.swift
[36/36] Compiling SnapshotTesting String+SpecialCharacters.swift
[38/47] Compiling SnapshotTestingHEIC NSViewController.swift
[39/48] Compiling SnapshotTestingHEIC UIImage.swift
[40/48] Compiling SnapshotTestingHEIC SwiftUIView.swift
[41/48] Compiling SnapshotTestingHEIC UIView.swift
[42/48] Compiling SnapshotTestingHEIC CompressionQuality.swift
[43/48] Compiling SnapshotTestingHEIC NSImage+HEIC.swift
[44/48] Emitting module SnapshotTestingHEIC
[45/48] Compiling SnapshotTestingHEIC NSView.swift
[46/48] Compiling SnapshotTestingHEIC UIImage+HEIC.swift
[47/48] Compiling SnapshotTestingHEIC NSImage.swift
[48/48] Compiling SnapshotTestingHEIC UIViewController.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[50/55] Emitting module SnapshotTestingStitch
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[51/55] Compiling SnapshotTestingStitch ImageFormat.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[52/55] Compiling SnapshotTestingStitch StitchTask.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[53/55] Compiling SnapshotTestingStitch StitchStyle.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[54/55] Compiling SnapshotTestingStitch Snapshotting.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
[55/55] Compiling SnapshotTestingStitch Stitcher.swift
/host/spi-builder-workspace/Sources/SnapshotTestingStitch/Snapshotting.swift:1:8: error: no such module 'UIKit'
  1 | import UIKit
    |        `- error: no such module 'UIKit'
  2 | import SnapshotTesting
  3 | import SnapshotTestingHEIC
BUILD FAILURE 6.1 linux