Swift Package IndexBuild Information
Successful build of Serializer, reference master (2bad36), with Swift 6.1 for macOS (SPM) on 19 Aug 2026 08:29:05 UTC.
Swift 6 data race errors: 2
Build Command
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.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 InferSendableFromCapturesBuild Log
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RunAll
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Builder version: 5.0.2
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/jnkel/Serializer.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/jnkel/Serializer
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
HEAD is now at 2bad36b add canEncode method to Serializer protocol
Cloned https://github.com/jnkel/Serializer.git
Revision (git rev-parse @):
2bad36bfe5ede3f3914835b2e6c0432bf1a31853
SUCCESS checkout https://github.com/jnkel/Serializer.git at master
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Build
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Selected platform: macosSpm
Swift version: 6.1
Building package at path: $PWD
https://github.com/jnkel/Serializer.git
https://github.com/jnkel/Serializer.git
{
"dependencies" : [
],
"manifest_display_name" : "Serializer",
"name" : "Serializer",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "Serializer",
"targets" : [
"Serializer"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "SerializerTests",
"module_type" : "SwiftTarget",
"name" : "SerializerTests",
"path" : "Tests/SerializerTests",
"sources" : [
"SerializerTests.swift"
],
"target_dependencies" : [
"Serializer"
],
"type" : "test"
},
{
"c99name" : "Serializer",
"module_type" : "SwiftTarget",
"name" : "Serializer",
"path" : "Sources/Serializer",
"product_memberships" : [
"Serializer"
],
"sources" : [
"Deserialization.swift",
"Serialization.swift",
"Serializer.swift"
],
"type" : "library"
}
],
"tools_version" : "4.0"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.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-2F0A5646E1D333AE.txt
[3/6] Compiling Serializer Serialization.swift
[4/6] Emitting module Serializer
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Deserialization.swift:13:10: warning: associated value 'typeMismatch(expected:actual:)' of 'Sendable'-conforming enum 'DecodingError' has non-sendable type 'Serializable'; this is an error in the Swift 6 language mode
11 |
12 | public enum DecodingError: Error {
13 | case typeMismatch(expected: Any.Type, actual: Serializable)
| `- warning: associated value 'typeMismatch(expected:actual:)' of 'Sendable'-conforming enum 'DecodingError' has non-sendable type 'Serializable'; this is an error in the Swift 6 language mode
14 | case unkeyedContainerAtEnd
15 | case unexpectedNull
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Serializer.swift:125:13: note: consider making enum 'Serializable' conform to the 'Sendable' protocol
123 |
124 | ///A `Serializable` stores an object in a format which may be easily serialized.
125 | public enum Serializable {
| `- note: consider making enum 'Serializable' conform to the 'Sendable' protocol
126 | case null
127 |
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Deserialization.swift:19:13: warning: var 'dateFormatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
17 | }
18 |
19 | private var dateFormatter: DateFormatter = {
| |- warning: var 'dateFormatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'dateFormatter' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make var 'dateFormatter' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
20 | var formatter = DateFormatter()
21 | formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZ"
[5/6] Compiling Serializer Deserialization.swift
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Deserialization.swift:13:10: warning: associated value 'typeMismatch(expected:actual:)' of 'Sendable'-conforming enum 'DecodingError' has non-sendable type 'Serializable'; this is an error in the Swift 6 language mode
11 |
12 | public enum DecodingError: Error {
13 | case typeMismatch(expected: Any.Type, actual: Serializable)
| `- warning: associated value 'typeMismatch(expected:actual:)' of 'Sendable'-conforming enum 'DecodingError' has non-sendable type 'Serializable'; this is an error in the Swift 6 language mode
14 | case unkeyedContainerAtEnd
15 | case unexpectedNull
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Serializer.swift:125:13: note: consider making enum 'Serializable' conform to the 'Sendable' protocol
123 |
124 | ///A `Serializable` stores an object in a format which may be easily serialized.
125 | public enum Serializable {
| `- note: consider making enum 'Serializable' conform to the 'Sendable' protocol
126 | case null
127 |
/Users/admin/builder/spi-builder-workspace/Sources/Serializer/Deserialization.swift:19:13: warning: var 'dateFormatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
17 | }
18 |
19 | private var dateFormatter: DateFormatter = {
| |- warning: var 'dateFormatter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'dateFormatter' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make var 'dateFormatter' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
20 | var formatter = DateFormatter()
21 | formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZ"
[6/6] Compiling Serializer Serializer.swift
Build complete! (4.00s)
Build complete.
{
"dependencies" : [
],
"manifest_display_name" : "Serializer",
"name" : "Serializer",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "Serializer",
"targets" : [
"Serializer"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "SerializerTests",
"module_type" : "SwiftTarget",
"name" : "SerializerTests",
"path" : "Tests/SerializerTests",
"sources" : [
"SerializerTests.swift"
],
"target_dependencies" : [
"Serializer"
],
"type" : "test"
},
{
"c99name" : "Serializer",
"module_type" : "SwiftTarget",
"name" : "Serializer",
"path" : "Sources/Serializer",
"product_memberships" : [
"Serializer"
],
"sources" : [
"Deserialization.swift",
"Serialization.swift",
"Serializer.swift"
],
"type" : "library"
}
],
"tools_version" : "4.0"
}
Done.