KrakenKit – Build Information – Swift Package Index

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 KrakenKit, reference master (cba32f), with Swift 6.1 for Linux on 25 Apr 2025 15:49:38 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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/krakencl/krakenkit.git
Reference: master
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/krakencl/krakenkit
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at cba32fe Add HOW TO repository notice.
Cloned https://github.com/krakencl/krakenkit.git
Revision (git rev-parse @):
cba32fe482765679b891ec6491e74f4e82574ec2
SUCCESS checkout https://github.com/krakencl/krakenkit.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/krakencl/krakenkit.git
https://github.com/krakencl/krakenkit.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-protobuf",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-protobuf.git"
    },
    {
      "identity" : "libpng",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.0.3",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/KrakenCL/LibPNG.git"
    }
  ],
  "manifest_display_name" : "KrakenKit",
  "name" : "KrakenKit",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Proto",
      "targets" : [
        "Proto"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    },
    {
      "name" : "KrakenKit",
      "targets" : [
        "KrakenKit"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Proto",
      "module_type" : "SwiftTarget",
      "name" : "Proto",
      "path" : "Sources/Proto",
      "product_dependencies" : [
        "SwiftProtobuf"
      ],
      "product_memberships" : [
        "Proto",
        "KrakenKit"
      ],
      "sources" : [
        "core/debug/debug_service.pb.swift",
        "core/debug/debugger_event_metadata.pb.swift",
        "core/framework/allocation_description.pb.swift",
        "core/framework/api_def.pb.swift",
        "core/framework/attr_value.pb.swift",
        "core/framework/cost_graph.pb.swift",
        "core/framework/device_attributes.pb.swift",
        "core/framework/function.pb.swift",
        "core/framework/graph.pb.swift",
        "core/framework/graph_transfer_info.pb.swift",
        "core/framework/iterator.pb.swift",
        "core/framework/kernel_def.pb.swift",
        "core/framework/log_memory.pb.swift",
        "core/framework/node_def.pb.swift",
        "core/framework/op_def.pb.swift",
        "core/framework/reader_base.pb.swift",
        "core/framework/remote_fused_graph_execute_info.pb.swift",
        "core/framework/resource_handle.pb.swift",
        "core/framework/step_stats.pb.swift",
        "core/framework/summary.pb.swift",
        "core/framework/tensor.pb.swift",
        "core/framework/tensor_description.pb.swift",
        "core/framework/tensor_shape.pb.swift",
        "core/framework/tensor_slice.pb.swift",
        "core/framework/types.pb.swift",
        "core/framework/variable.pb.swift",
        "core/framework/versions.pb.swift",
        "core/grappler/costs/op_performance_data.pb.swift",
        "core/kernels/boosted_trees/boosted_trees.pb.swift",
        "core/lib/core/error_codes.pb.swift",
        "core/profiler/profile.pb.swift",
        "core/profiler/tfprof_log.pb.swift",
        "core/profiler/tfprof_options.pb.swift",
        "core/profiler/tfprof_output.pb.swift",
        "core/protobuf/checkpointable_object_graph.pb.swift",
        "core/protobuf/cluster.pb.swift",
        "core/protobuf/config.pb.swift",
        "core/protobuf/control_flow.pb.swift",
        "core/protobuf/critical_section.pb.swift",
        "core/protobuf/debug.pb.swift",
        "core/protobuf/device_properties.pb.swift",
        "core/protobuf/eager_service.pb.swift",
        "core/protobuf/master.pb.swift",
        "core/protobuf/master_service.pb.swift",
        "core/protobuf/meta_graph.pb.swift",
        "core/protobuf/named_tensor.pb.swift",
        "core/protobuf/queue_runner.pb.swift",
        "core/protobuf/replay_log.pb.swift",
        "core/protobuf/rewriter_config.pb.swift",
        "core/protobuf/saved_model.pb.swift",
        "core/protobuf/saver.pb.swift",
        "core/protobuf/tensor_bundle.pb.swift",
        "core/protobuf/tensorflow_server.pb.swift",
        "core/protobuf/transport_options.pb.swift",
        "core/protobuf/worker.pb.swift",
        "core/protobuf/worker_service.pb.swift",
        "core/util/event.pb.swift",
        "core/util/memmapped_file_system.pb.swift",
        "core/util/saved_tensor_slice.pb.swift",
        "core/util/test_log.pb.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "KrakenKitTests",
      "module_type" : "SwiftTarget",
      "name" : "KrakenKitTests",
      "path" : "Tests/KrakenKitTests",
      "sources" : [
        "KrakenKitTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "KrakenKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "KrakenKit",
      "module_type" : "SwiftTarget",
      "name" : "KrakenKit",
      "path" : "Sources/KrakenKit",
      "product_dependencies" : [
        "LibPNG"
      ],
      "product_memberships" : [
        "KrakenKit"
      ],
      "sources" : [
        "DataType.swift",
        "FileWriter.swift",
        "Histogram.swift",
        "KrakenKit.swift",
        "Record.swift",
        "Summary.swift",
        "Tensor+Proto.swift"
      ],
      "target_dependencies" : [
        "Proto"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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/KrakenCL/LibPNG.git
Fetching https://github.com/apple/swift-protobuf.git
[1/57] Fetching libpng
[58/38561] Fetching libpng, swift-protobuf
Fetched https://github.com/KrakenCL/LibPNG.git from cache (7.17s)
Fetched https://github.com/apple/swift-protobuf.git from cache (7.27s)
Computing version for https://github.com/KrakenCL/LibPNG.git
Computed https://github.com/KrakenCL/LibPNG.git at 0.0.3 (7.86s)
Computing version for https://github.com/apple/swift-protobuf.git
Computed https://github.com/apple/swift-protobuf.git at 1.29.0 (0.62s)
Creating working copy for https://github.com/KrakenCL/LibPNG.git
Working copy of https://github.com/KrakenCL/LibPNG.git resolved at 0.0.3
Creating working copy for https://github.com/apple/swift-protobuf.git
Working copy of https://github.com/apple/swift-protobuf.git resolved at 1.29.0
warning: you may be able to install libpng using your system-packager:
    apt-get install libpng
warning: you may be able to install libpng using your system-packager:
    apt-get install libpng
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
[1/15] Write sources
[5/15] Copying PrivacyInfo.xcprivacy
[6/15] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[8/100] Emitting module LibPNG
/host/spi-builder-workspace/.build/checkouts/LibPNG/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/host/spi-builder-workspace/.build/checkouts/LibPNG/Sources/LibPNG/LibPNG.swift:19:8: error: could not build C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
[9/100] Compiling LibPNG LibPNG.swift
/host/spi-builder-workspace/.build/checkouts/LibPNG/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/host/spi-builder-workspace/.build/checkouts/LibPNG/Sources/LibPNG/LibPNG.swift:19:8: error: could not build C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
[10/100] Compiling SwiftProtobuf Message+JSONAdditions.swift
[11/100] Compiling SwiftProtobuf Message+JSONAdditions_Data.swift
[12/100] Compiling SwiftProtobuf Message+JSONArrayAdditions.swift
[13/100] Compiling SwiftProtobuf Message+JSONArrayAdditions_Data.swift
[14/100] Compiling SwiftProtobuf Message+TextFormatAdditions.swift
[15/100] Compiling SwiftProtobuf Message.swift
[16/100] Compiling SwiftProtobuf MessageExtension.swift
[17/100] Compiling SwiftProtobuf NameMap.swift
[18/100] Compiling SwiftProtobuf PathDecoder.swift
[19/100] Compiling SwiftProtobuf PathVisitor.swift
[20/100] Compiling SwiftProtobuf ProtoNameProviding.swift
[21/100] Compiling SwiftProtobuf ProtobufAPIVersionCheck.swift
[22/100] Compiling SwiftProtobuf ProtobufMap.swift
[23/100] Compiling SwiftProtobuf SelectiveVisitor.swift
[24/100] Compiling SwiftProtobuf SimpleExtensionMap.swift
[25/100] Compiling SwiftProtobuf StringUtils.swift
[26/100] Compiling SwiftProtobuf SwiftProtobufContiguousBytes.swift
[27/100] Compiling SwiftProtobuf SwiftProtobufError.swift
[28/100] Compiling SwiftProtobuf TextFormatDecoder.swift
[29/100] Compiling SwiftProtobuf TextFormatDecodingError.swift
[30/100] Compiling SwiftProtobuf TextFormatDecodingOptions.swift
[31/100] Compiling SwiftProtobuf TextFormatEncoder.swift
[32/100] Compiling SwiftProtobuf TextFormatEncodingOptions.swift
[33/100] Compiling SwiftProtobuf TextFormatEncodingVisitor.swift
[34/100] Compiling SwiftProtobuf TextFormatScanner.swift
[35/100] Compiling SwiftProtobuf TimeUtils.swift
[36/100] Compiling SwiftProtobuf UnknownStorage.swift
[37/100] Compiling SwiftProtobuf UnsafeRawPointer+Shims.swift
[38/100] Compiling SwiftProtobuf Varint.swift
[39/100] Compiling SwiftProtobuf Version.swift
[40/100] Compiling SwiftProtobuf Visitor.swift
[41/100] Compiling SwiftProtobuf WireFormat.swift
[42/100] Compiling SwiftProtobuf ZigZag.swift
[43/100] Compiling SwiftProtobuf any.pb.swift
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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: you may be able to install libpng using your system-packager:
    apt-get install libpng
warning: you may be able to install libpng using your system-packager:
    apt-get install libpng
[0/1] Planning build
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
[1/10] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/95] Emitting module LibPNG
/host/spi-builder-workspace/.build/checkouts/LibPNG/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/host/spi-builder-workspace/.build/checkouts/LibPNG/Sources/LibPNG/LibPNG.swift:19:8: error: could not build C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
[4/95] Compiling LibPNG LibPNG.swift
/host/spi-builder-workspace/.build/checkouts/LibPNG/Library/CPNG/module.modulemap:2:10: error: header '/usr/local/include/png.h' not found
1 | module CPNG [system] {
2 |   header "/usr/local/include/png.h"
  |          `- error: header '/usr/local/include/png.h' not found
3 |   link "png"
4 |   export *
/host/spi-builder-workspace/.build/checkouts/LibPNG/Sources/LibPNG/LibPNG.swift:19:8: error: could not build C module 'CPNG'
 17 |
 18 | import Foundation
 19 | import CPNG
    |        `- error: could not build C module 'CPNG'
 20 |
 21 | public typealias Pixel = UInt8
BUILD FAILURE 6.1 linux