Swift Package IndexBuild Information
Successful build of URLSessionBackport, reference main (133026), with Swift 6.3 for macOS (SPM) on 12 Apr 2026 14:29:08 UTC.
Swift 6 data race errors: 0
Build Command
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64Build Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mochidev/URLSessionBackport.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mochidev/URLSessionBackport
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 133026d Removed the last preconditionFailure
Cloned https://github.com/mochidev/URLSessionBackport.git
Revision (git rev-parse @):
133026d8723a81d7ddd293ce3d9fcadf72317517
SUCCESS checkout https://github.com/mochidev/URLSessionBackport.git at main
========================================
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",
"traits": [
"default"
],
"dependencies": [
{
"identity": "urlsessionbackport",
"name": "URLSessionBackport",
"url": "https://github.com/mochidev/URLSessionBackport.git",
"version": "unspecified",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/URLSessionBackport",
"traits": [
"default"
],
"dependencies": [
]
}
]
}
Fetching https://github.com/mochidev/URLSessionBackport.git
[1/165] Fetching urlsessionbackport
Fetched https://github.com/mochidev/URLSessionBackport.git from cache (0.64s)
Creating working copy for https://github.com/mochidev/URLSessionBackport.git
Working copy of https://github.com/mochidev/URLSessionBackport.git resolved at main (133026d)
warning: '.resolve-product-dependencies': dependency 'urlsessionbackport' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform: macosSpm
Swift version: 6.3
Building package at path: $PWD
https://github.com/mochidev/URLSessionBackport.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--6988338F2F200930.txt
[3/8] Compiling URLSessionBackport TaskDelegateHandler.swift
[4/8] Compiling URLSessionBackport URLSessionBackport.swift
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:124:88: warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
122 | } else {
123 | return try await withUnsafeThrowingContinuation { continuation in
124 | resume(session.dataTask(with: request, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
125 | }
126 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:139:84: warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
137 | } else {
138 | return try await withUnsafeThrowingContinuation { continuation in
139 | resume(session.dataTask(with: url, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
140 | }
141 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:155:109: warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
153 | } else {
154 | return try await withUnsafeThrowingContinuation { continuation in
155 | resume(session.uploadTask(with: request, fromFile: fileURL, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
156 | }
157 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:171:106: warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
169 | } else {
170 | return try await withUnsafeThrowingContinuation { continuation in
171 | resume(session.uploadTask(with: request, from: bodyData, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (Data?, URLResponse?, (any Error)?) -> Void' may introduce data races
172 | }
173 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:186:92: warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
184 | } else {
185 | return try await withUnsafeThrowingContinuation { continuation in
186 | resume(session.downloadTask(with: request, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
187 | }
188 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:201:88: warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
199 | } else {
200 | return try await withUnsafeThrowingContinuation { continuation in
201 | resume(session.downloadTask(with: url, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
202 | }
203 | }
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift:216:105: warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
214 | } else {
215 | return try await withUnsafeThrowingContinuation { continuation in
216 | resume(session.downloadTask(withResumeData: resumeData, completionHandler: continuation.taskCompletionHandler), with: delegate)
| `- warning: converting non-Sendable function value to '@Sendable (URL?, URLResponse?, (any Error)?) -> Void' may introduce data races
217 | }
218 | }
[5/8] Compiling URLSessionBackport AsyncBytes.swift
[6/8] Compiling URLSessionBackport DataAccumulator.swift
[7/8] Compiling URLSessionBackport SessionDelegateProxy.swift
[8/8] Emitting module URLSessionBackport
Build complete! (4.16s)
Build complete.
{
"dependencies" : [
],
"manifest_display_name" : "URLSessionBackport",
"name" : "URLSessionBackport",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
{
"name" : "macos",
"version" : "10.15"
},
{
"name" : "ios",
"version" : "13.0"
},
{
"name" : "watchos",
"version" : "6.0"
}
],
"products" : [
{
"name" : "URLSessionBackport",
"targets" : [
"URLSessionBackport"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "URLSessionBackportTests",
"module_type" : "SwiftTarget",
"name" : "URLSessionBackportTests",
"path" : "Tests/URLSessionBackportTests",
"sources" : [
"URLSessionBackportTests.swift"
],
"target_dependencies" : [
"URLSessionBackport"
],
"type" : "test"
},
{
"c99name" : "URLSessionBackport",
"module_type" : "SwiftTarget",
"name" : "URLSessionBackport",
"path" : "Sources/URLSessionBackport",
"product_memberships" : [
"URLSessionBackport"
],
"sources" : [
"AsyncBytes.swift",
"DataAccumulator.swift",
"SessionDelegateProxy.swift",
"TaskDelegateHandler.swift",
"URLSessionBackport.swift"
],
"type" : "library"
}
],
"tools_version" : "5.5"
}
Done.