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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 Elephant, reference 0.1.2 (c6cb1d), with Swift 6.1 for Linux on 27 Apr 2025 08:48:13 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/s2mr/Elephant.git
Reference: 0.1.2
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/s2mr/Elephant
 * tag               0.1.2      -> FETCH_HEAD
HEAD is now at c6cb1d4 Update README
Cloned https://github.com/s2mr/Elephant.git
Revision (git rev-parse @):
c6cb1d4e39a3cceadf44c0b95e11230e3eec0904
SUCCESS checkout https://github.com/s2mr/Elephant.git at 0.1.2
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/s2mr/Elephant.git
https://github.com/s2mr/Elephant.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Elephant",
  "name" : "Elephant",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "Elephant",
      "targets" : [
        "Elephant"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ElephantTests",
      "module_type" : "SwiftTarget",
      "name" : "ElephantTests",
      "path" : "Tests/ElephantTests",
      "sources" : [
        "ElephantTests.swift"
      ],
      "target_dependencies" : [
        "Elephant"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Elephant",
      "module_type" : "SwiftTarget",
      "name" : "Elephant",
      "path" : "Sources/Elephant",
      "product_memberships" : [
        "Elephant"
      ],
      "sources" : [
        "AnimationOwner.swift",
        "JavaScriptExecutor.swift",
        "SVGLoader.swift",
        "SVGView.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$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
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /host/spi-builder-workspace/Sources/Elephant/Info.plist
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/7] Compiling Elephant SVGView.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[4/7] Compiling Elephant SVGLoader.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/7] Emitting module Elephant
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[6/7] Compiling Elephant JavaScriptExecutor.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[7/7] Compiling Elephant AnimationOwner.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
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
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /host/spi-builder-workspace/Sources/Elephant/Info.plist
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/6] Compiling Elephant SVGView.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/6] Emitting module Elephant
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[4/6] Compiling Elephant JavaScriptExecutor.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[5/6] Compiling Elephant SVGLoader.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
[6/6] Compiling Elephant AnimationOwner.swift
/host/spi-builder-workspace/Sources/Elephant/JavaScriptExecutor.swift:2:8: error: no such module 'WebKit'
 1 | import Foundation
 2 | import WebKit
   |        `- error: no such module 'WebKit'
 3 |
 4 | final class JavaScriptExecutor: NSObject {
BUILD FAILURE 6.1 linux