Swift Package IndexBuild Information
Successful build of JJLISO8601DateFormatter, reference master (50d5ea), with Swift 6.1 for macOS (SPM) on 7 Feb 2026 04:39:12 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
========================================
RunAll
========================================
Builder version: 4.68.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/michaeleisel/JJLISO8601DateFormatter.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/michaeleisel/JJLISO8601DateFormatter
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
HEAD is now at 50d5ea2 bump to 0.2.0
Cloned https://github.com/michaeleisel/JJLISO8601DateFormatter.git
Revision (git rev-parse @):
50d5ea26ffd3f82e3db8516d939d80b745e168cf
SUCCESS checkout https://github.com/michaeleisel/JJLISO8601DateFormatter.git at master
========================================
Build
========================================
Selected platform: macosSpm
Swift version: 6.1
Building package at path: $PWD
https://github.com/michaeleisel/JJLISO8601DateFormatter.git
https://github.com/michaeleisel/JJLISO8601DateFormatter.git
{
"dependencies" : [
],
"manifest_display_name" : "JJLISO8601DateFormatter",
"name" : "JJLISO8601DateFormatter",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "JJLISO8601DateFormatter",
"targets" : [
"JJLISO8601DateFormatter"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "tzdb",
"module_type" : "ClangTarget",
"name" : "tzdb",
"path" : "Sources/tzdb",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"localtime.c"
],
"type" : "library"
},
{
"c99name" : "JJLInternal",
"module_type" : "ClangTarget",
"name" : "JJLInternal",
"path" : "Sources/JJLInternal",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"JJLInternal.c"
],
"target_dependencies" : [
"tzdb"
],
"type" : "library"
},
{
"c99name" : "JJLISO8601DateFormatterTests",
"module_type" : "SwiftTarget",
"name" : "JJLISO8601DateFormatterTests",
"path" : "Tests/JJLISO8601DateFormatterTests",
"sources" : [
"JJLISO8601DateFormatterTests.swift",
"JJLSafeIOTests.swift"
],
"target_dependencies" : [
"JJLISO8601DateFormatter"
],
"type" : "test"
},
{
"c99name" : "JJLISO8601DateFormatter",
"module_type" : "SwiftTarget",
"name" : "JJLISO8601DateFormatter",
"path" : "Sources/JJLISO8601DateFormatter",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"JJLISO8601DateFormatter.swift"
],
"target_dependencies" : [
"JJLInternal"
],
"type" : "library"
}
],
"tools_version" : "5.0"
}
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...
[0/4] Write sources
[1/4] Write swift-version-2F0A5646E1D333AE.txt
[2/4] Compiling JJLInternal JJLInternal.c
[3/6] Compiling tzdb localtime.c
[5/6] Emitting module JJLISO8601DateFormatter
/Users/admin/builder/spi-builder-workspace/Sources/JJLISO8601DateFormatter/JJLISO8601DateFormatter.swift:11:24: warning: static property 'nameToTimeZone' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
9 |
10 | private static let gmtTimeZone = TimeZone(identifier: "GMT")!
11 | private static var nameToTimeZone: [String: timezone_t] = [:]
| |- warning: static property 'nameToTimeZone' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'nameToTimeZone' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'nameToTimeZone' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 | private static var dictionaryLock: UnsafeMutablePointer<pthread_rwlock_t> = {
13 | let lock = UnsafeMutablePointer<pthread_rwlock_t>.allocate(capacity: 1)
/Users/admin/builder/spi-builder-workspace/Sources/JJLISO8601DateFormatter/JJLISO8601DateFormatter.swift:12:24: warning: static property 'dictionaryLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | private static let gmtTimeZone = TimeZone(identifier: "GMT")!
11 | private static var nameToTimeZone: [String: timezone_t] = [:]
12 | private static var dictionaryLock: UnsafeMutablePointer<pthread_rwlock_t> = {
| |- warning: static property 'dictionaryLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'dictionaryLock' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'dictionaryLock' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 | let lock = UnsafeMutablePointer<pthread_rwlock_t>.allocate(capacity: 1)
14 | pthread_rwlock_init(lock, nil)
[6/6] Compiling JJLISO8601DateFormatter JJLISO8601DateFormatter.swift
/Users/admin/builder/spi-builder-workspace/Sources/JJLISO8601DateFormatter/JJLISO8601DateFormatter.swift:11:24: warning: static property 'nameToTimeZone' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
9 |
10 | private static let gmtTimeZone = TimeZone(identifier: "GMT")!
11 | private static var nameToTimeZone: [String: timezone_t] = [:]
| |- warning: static property 'nameToTimeZone' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'nameToTimeZone' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'nameToTimeZone' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 | private static var dictionaryLock: UnsafeMutablePointer<pthread_rwlock_t> = {
13 | let lock = UnsafeMutablePointer<pthread_rwlock_t>.allocate(capacity: 1)
/Users/admin/builder/spi-builder-workspace/Sources/JJLISO8601DateFormatter/JJLISO8601DateFormatter.swift:12:24: warning: static property 'dictionaryLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | private static let gmtTimeZone = TimeZone(identifier: "GMT")!
11 | private static var nameToTimeZone: [String: timezone_t] = [:]
12 | private static var dictionaryLock: UnsafeMutablePointer<pthread_rwlock_t> = {
| |- warning: static property 'dictionaryLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'dictionaryLock' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'dictionaryLock' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 | let lock = UnsafeMutablePointer<pthread_rwlock_t>.allocate(capacity: 1)
14 | pthread_rwlock_init(lock, nil)
Build complete! (4.18s)
Build complete.
{
"dependencies" : [
],
"manifest_display_name" : "JJLISO8601DateFormatter",
"name" : "JJLISO8601DateFormatter",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "JJLISO8601DateFormatter",
"targets" : [
"JJLISO8601DateFormatter"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "tzdb",
"module_type" : "ClangTarget",
"name" : "tzdb",
"path" : "Sources/tzdb",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"localtime.c"
],
"type" : "library"
},
{
"c99name" : "JJLInternal",
"module_type" : "ClangTarget",
"name" : "JJLInternal",
"path" : "Sources/JJLInternal",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"JJLInternal.c"
],
"target_dependencies" : [
"tzdb"
],
"type" : "library"
},
{
"c99name" : "JJLISO8601DateFormatterTests",
"module_type" : "SwiftTarget",
"name" : "JJLISO8601DateFormatterTests",
"path" : "Tests/JJLISO8601DateFormatterTests",
"sources" : [
"JJLISO8601DateFormatterTests.swift",
"JJLSafeIOTests.swift"
],
"target_dependencies" : [
"JJLISO8601DateFormatter"
],
"type" : "test"
},
{
"c99name" : "JJLISO8601DateFormatter",
"module_type" : "SwiftTarget",
"name" : "JJLISO8601DateFormatter",
"path" : "Sources/JJLISO8601DateFormatter",
"product_memberships" : [
"JJLISO8601DateFormatter"
],
"sources" : [
"JJLISO8601DateFormatter.swift"
],
"target_dependencies" : [
"JJLInternal"
],
"type" : "library"
}
],
"tools_version" : "5.0"
}
Done.