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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 ReadiumFuzi, reference 4.0.0 (347aab), with Swift 6.1 for Linux on 30 Apr 2025 02:56:52 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/readium/Fuzi.git
Reference: 4.0.0
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/readium/Fuzi
 * tag               4.0.0      -> FETCH_HEAD
HEAD is now at 347aab1 Rename packages (#2)
Cloned https://github.com/readium/Fuzi.git
Revision (git rev-parse @):
347aab158ff8894966ff80469b384bb5337928cd
SUCCESS checkout https://github.com/readium/Fuzi.git at 4.0.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/readium/Fuzi.git
https://github.com/readium/Fuzi.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ReadiumFuzi",
  "name" : "ReadiumFuzi",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "ReadiumFuzi",
      "targets" : [
        "ReadiumFuzi"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReadiumFuziTests",
      "module_type" : "SwiftTarget",
      "name" : "ReadiumFuziTests",
      "path" : "Tests",
      "sources" : [
        "AtomTests.swift",
        "CSSTests.swift",
        "DefaultNamespaceXPathTests.swift",
        "HTMLTests.swift",
        "VMAPTests.swift",
        "XMLTests.swift",
        "XPathFunctionResultTests.swift"
      ],
      "target_dependencies" : [
        "ReadiumFuzi"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ReadiumFuzi",
      "module_type" : "SwiftTarget",
      "name" : "ReadiumFuzi",
      "path" : "Sources",
      "product_memberships" : [
        "ReadiumFuzi"
      ],
      "sources" : [
        "Document.swift",
        "Element.swift",
        "Error.swift",
        "Helpers.swift",
        "Node.swift",
        "NodeSet.swift",
        "Queryable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$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
[3/10] Compiling ReadiumFuzi NodeSet.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[4/10] Compiling ReadiumFuzi Queryable.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[5/10] Compiling ReadiumFuzi Helpers.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[6/10] Compiling ReadiumFuzi Node.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/10] Emitting module ReadiumFuzi
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[8/10] Compiling ReadiumFuzi Error.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[9/10] Compiling ReadiumFuzi Document.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[10/10] Compiling ReadiumFuzi Element.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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
[2/9] Compiling ReadiumFuzi Queryable.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[3/9] Compiling ReadiumFuzi Element.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[4/9] Compiling ReadiumFuzi Helpers.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[5/9] Compiling ReadiumFuzi NodeSet.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[6/9] Compiling ReadiumFuzi Document.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/9] Emitting module ReadiumFuzi
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[8/9] Compiling ReadiumFuzi Error.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
[9/9] Compiling ReadiumFuzi Node.swift
/host/spi-builder-workspace/Sources/Document.swift:23:8: error: no such module 'libxml2'
 21 |
 22 | import Foundation
 23 | import libxml2
    |        `- error: no such module 'libxml2'
 24 |
 25 | /// XML document which can be searched and queried.
BUILD FAILURE 6.1 linux