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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 ThirdPartyMailer, reference 2.1.0 (44c1cf), with Swift 6.0 for macOS (SPM) on 28 Nov 2024 15:34:33 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -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

Build Log

========================================
RunAll
========================================
Builder version: 4.58.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/vtourraine/thirdpartymailer.git
Reference: 2.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vtourraine/thirdpartymailer
 * tag               2.1.0      -> FETCH_HEAD
HEAD is now at 44c1cfa Bump to version 2.1.0
Cloned https://github.com/vtourraine/thirdpartymailer.git
Revision (git rev-parse @):
44c1cfaa6969963f22691aa67f88a69e3b6d651f
SUCCESS checkout https://github.com/vtourraine/thirdpartymailer.git at 2.1.0
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "thirdpartymailer",
      "name": "ThirdPartyMailer",
      "url": "https://github.com/vtourraine/thirdpartymailer.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/thirdpartymailer",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/vtourraine/thirdpartymailer.git
[1/832] Fetching thirdpartymailer
Fetched https://github.com/vtourraine/thirdpartymailer.git from cache (1.12s)
Creating working copy for https://github.com/vtourraine/thirdpartymailer.git
Working copy of https://github.com/vtourraine/thirdpartymailer.git resolved at 2.1.0 (44c1cfa)
warning: '.resolve-product-dependencies': dependency 'thirdpartymailer' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/vtourraine/thirdpartymailer.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--7754E27361AE5C74.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/5] Emitting module ThirdPartyMailer
/Users/admin/builder/spi-builder-workspace/Sources/ThirdPartyMailer/ThirdPartyMailer.swift:24:8: error: no such module 'UIKit'
22 | // THE SOFTWARE.
23 |
24 | import UIKit
   |        `- error: no such module 'UIKit'
25 |
26 | /// Tests third party mail clients availability, and opens third party mail clients in compose mode.
[4/5] Compiling ThirdPartyMailer ThirdPartyMailClient.swift
/Users/admin/builder/spi-builder-workspace/Sources/ThirdPartyMailer/ThirdPartyMailer.swift:24:8: error: no such module 'UIKit'
22 | // THE SOFTWARE.
23 |
24 | import UIKit
   |        `- error: no such module 'UIKit'
25 |
26 | /// Tests third party mail clients availability, and opens third party mail clients in compose mode.
[5/5] Compiling ThirdPartyMailer ThirdPartyMailer.swift
/Users/admin/builder/spi-builder-workspace/Sources/ThirdPartyMailer/ThirdPartyMailer.swift:24:8: error: no such module 'UIKit'
22 | // THE SOFTWARE.
23 |
24 | import UIKit
   |        `- error: no such module 'UIKit'
25 |
26 | /// Tests third party mail clients availability, and opens third party mail clients in compose mode.
BUILD FAILURE 6.0 macosSpm