Swift Package IndexBuild Information
Failed to build mcp-swift-sdk, reference 0.12.0 (6132fd), with Swift 6.0 for macOS (SPM) on 24 Mar 2026 13:25:41 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64Build Log
========================================
RunAll
========================================
Builder version: 4.69.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/modelcontextprotocol/swift-sdk.git
Reference: 0.12.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/modelcontextprotocol/swift-sdk
* tag 0.12.0 -> FETCH_HEAD
HEAD is now at 6132fd4 V0.12.x (#215)
Cloned https://github.com/modelcontextprotocol/swift-sdk.git
Revision (git rev-parse @):
6132fd4b5b4217ce4717c4775e4607f5c3120129
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/modelcontextprotocol/swift-sdk.git at 0.12.0
========================================
Build
========================================
Selected platform: macosSpm
Swift version: 6.0
Building package at path: $PWD
https://github.com/modelcontextprotocol/swift-sdk.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64
Building for debugging...
[0/6] Write sources
[4/6] Compiling CSystem shims.c
[5/6] Write swift-version-5BDAB9E9C0126B9D.txt
[7/44] Emitting module SystemPackage
[8/47] Compiling SystemPackage Errno.swift
[9/47] Compiling SystemPackage ErrnoWindows.swift
[10/47] Compiling SystemPackage FileDescriptor.swift
[11/47] Compiling SystemPackage Util+StringArray.swift
[12/47] Compiling SystemPackage Util.swift
[13/47] Compiling SystemPackage UtilConsumers.swift
[14/47] Compiling SystemPackage RawBuffer.swift
[15/47] Compiling SystemPackage Syscalls.swift
[16/47] Compiling SystemPackage WindowsSyscallAdapters.swift
[17/47] Compiling SystemPackage FilePathComponentView.swift
[18/47] Compiling SystemPackage FilePathComponents.swift
[19/47] Compiling SystemPackage FilePathParsing.swift
[20/47] Compiling SystemPackage FilePathString.swift
[21/47] Compiling SystemPackage FilePathSyntax.swift
[22/47] Compiling SystemPackage FilePathTemp.swift
[23/47] Compiling SystemPackage FileHelpers.swift
[24/47] Compiling SystemPackage FileOperations.swift
[25/47] Compiling SystemPackage FilePath.swift
[26/47] Compiling SystemPackage FilePermissions.swift
[27/47] Compiling SystemPackage Backcompat.swift
[28/47] Compiling SystemPackage CInterop.swift
[29/47] Compiling SystemPackage Constants.swift
[30/47] Compiling SystemPackage Exports.swift
[31/47] Compiling SystemPackage Mocking.swift
[32/47] Compiling SystemPackage MachPort.swift
[33/47] Compiling SystemPackage PlatformString.swift
[34/47] Compiling SystemPackage SystemString.swift
[35/47] Compiling SystemPackage FilePathTempPosix.swift
[36/47] Compiling SystemPackage FilePathTempWindows.swift
[37/47] Compiling SystemPackage FilePathWindows.swift
[38/47] Compiling Logging MetadataProvider.swift
[39/47] Emitting module Logging
[40/47] Compiling Logging Logging.swift
[41/47] Compiling Logging LogHandler.swift
[42/47] Compiling Logging Locks.swift
[43/47] Compiling EventSource EventSource+AsyncHTTPClient.swift
[44/47] Emitting module EventSource
[45/47] Compiling EventSource AsyncSequence+Events.swift
[46/47] Compiling EventSource EventSource.swift
[47/47] Compiling EventSource AsyncEventsSequence.swift
[48/91] Emitting module MCP
[49/95] Compiling MCP OAuthDiscovery.swift
[50/95] Compiling MCP OAuthDiscoveryClient.swift
[51/95] Compiling MCP OAuthErrors.swift
[52/95] Compiling MCP OAuthModels.swift
[53/95] Compiling MCP OAuthTokenEndpointClient.swift
[54/95] Compiling MCP StatelessHTTPServerTransport.swift
[55/95] Compiling MCP InMemoryTransport.swift
[56/95] Compiling MCP NetworkTransport.swift
[57/95] Compiling MCP StdioTransport.swift
[58/95] Compiling MCP UnitInterval.swift
[59/95] Compiling MCP OAuthURLValidator.swift
[60/95] Compiling MCP OAuthWWWAuthenticateParser.swift
[61/95] Compiling MCP PKCE.swift
[62/95] Compiling MCP TokenStorage.swift
[63/95] Compiling MCP Error.swift
[64/95] Compiling MCP ID.swift
[65/95] Compiling MCP Icon.swift
[66/95] Compiling MCP Lifecycle.swift
[67/95] Compiling MCP Messages.swift
[68/95] Compiling MCP PendingRequest.swift
[69/95] Compiling MCP OAuthAuthorizationCodeFlow.swift
[70/95] Compiling MCP OAuthAuthorizer.swift
[71/95] Compiling MCP OAuthClientRegistrar.swift
[72/95] Compiling MCP OAuthConfiguration.swift
[73/95] Compiling MCP OAuthConstants.swift
[74/95] Compiling MCP Cancellation.swift
[75/95] Compiling MCP Ping.swift
[76/95] Compiling MCP Progress.swift
[77/95] Compiling MCP RequestContext.swift
[78/95] Compiling MCP Value.swift
[79/95] Compiling MCP Versioning.swift
[80/95] Compiling MCP Client.swift
[81/95] Compiling MCP Elicitation.swift
[82/95] Compiling MCP Roots.swift
[83/95] Compiling MCP Sampling.swift
[84/95] Compiling MCP Data+Extensions.swift
[85/95] Compiling MCP Completion.swift
[86/95] Compiling MCP Logging.swift
[87/95] Compiling MCP Transport.swift
/Users/admin/builder/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:485:31: error: missing argument for parameter 'of' in call
483 | let timeout = self.sseInitializationTimeout
484 | do {
485 | try await withThrowingTaskGroup { group in
| `- error: missing argument for parameter 'of' in call
486 | group.addTask {
487 | try await Task.sleep(for: .seconds(timeout))
_Concurrency.withThrowingTaskGroup:3:24: note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
1 | @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2 | @backDeployed(before: macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0)
3 | @inlinable public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(of childTaskResultType: ChildTaskResult.Type, returning returnType: GroupResult.Type = GroupResult.self, isolation: isolated (any Actor)? = #isolation, body: (inout ThrowingTaskGroup<ChildTaskResult, any Error>) async throws -> GroupResult) async rethrows -> GroupResult where ChildTaskResult : Sendable
| `- note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
[88/95] Compiling MCP HTTPClientTransport.swift
/Users/admin/builder/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:485:31: error: missing argument for parameter 'of' in call
483 | let timeout = self.sseInitializationTimeout
484 | do {
485 | try await withThrowingTaskGroup { group in
| `- error: missing argument for parameter 'of' in call
486 | group.addTask {
487 | try await Task.sleep(for: .seconds(timeout))
_Concurrency.withThrowingTaskGroup:3:24: note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
1 | @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2 | @backDeployed(before: macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0)
3 | @inlinable public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(of childTaskResultType: ChildTaskResult.Type, returning returnType: GroupResult.Type = GroupResult.self, isolation: isolated (any Actor)? = #isolation, body: (inout ThrowingTaskGroup<ChildTaskResult, any Error>) async throws -> GroupResult) async rethrows -> GroupResult where ChildTaskResult : Sendable
| `- note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
[89/95] Compiling MCP HTTPRequestValidation.swift
/Users/admin/builder/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:485:31: error: missing argument for parameter 'of' in call
483 | let timeout = self.sseInitializationTimeout
484 | do {
485 | try await withThrowingTaskGroup { group in
| `- error: missing argument for parameter 'of' in call
486 | group.addTask {
487 | try await Task.sleep(for: .seconds(timeout))
_Concurrency.withThrowingTaskGroup:3:24: note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
1 | @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2 | @backDeployed(before: macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0)
3 | @inlinable public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(of childTaskResultType: ChildTaskResult.Type, returning returnType: GroupResult.Type = GroupResult.self, isolation: isolated (any Actor)? = #isolation, body: (inout ThrowingTaskGroup<ChildTaskResult, any Error>) async throws -> GroupResult) async rethrows -> GroupResult where ChildTaskResult : Sendable
| `- note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
[90/95] Compiling MCP HTTPServerTypes.swift
/Users/admin/builder/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:485:31: error: missing argument for parameter 'of' in call
483 | let timeout = self.sseInitializationTimeout
484 | do {
485 | try await withThrowingTaskGroup { group in
| `- error: missing argument for parameter 'of' in call
486 | group.addTask {
487 | try await Task.sleep(for: .seconds(timeout))
_Concurrency.withThrowingTaskGroup:3:24: note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
1 | @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2 | @backDeployed(before: macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0)
3 | @inlinable public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(of childTaskResultType: ChildTaskResult.Type, returning returnType: GroupResult.Type = GroupResult.self, isolation: isolated (any Actor)? = #isolation, body: (inout ThrowingTaskGroup<ChildTaskResult, any Error>) async throws -> GroupResult) async rethrows -> GroupResult where ChildTaskResult : Sendable
| `- note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
[91/95] Compiling MCP StatefulHTTPServerTransport.swift
/Users/admin/builder/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:485:31: error: missing argument for parameter 'of' in call
483 | let timeout = self.sseInitializationTimeout
484 | do {
485 | try await withThrowingTaskGroup { group in
| `- error: missing argument for parameter 'of' in call
486 | group.addTask {
487 | try await Task.sleep(for: .seconds(timeout))
_Concurrency.withThrowingTaskGroup:3:24: note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
1 | @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
2 | @backDeployed(before: macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0)
3 | @inlinable public func withThrowingTaskGroup<ChildTaskResult, GroupResult>(of childTaskResultType: ChildTaskResult.Type, returning returnType: GroupResult.Type = GroupResult.self, isolation: isolated (any Actor)? = #isolation, body: (inout ThrowingTaskGroup<ChildTaskResult, any Error>) async throws -> GroupResult) async rethrows -> GroupResult where ChildTaskResult : Sendable
| `- note: 'withThrowingTaskGroup(of:returning:isolation:body:)' declared here
[92/95] Compiling MCP Prompts.swift
[93/95] Compiling MCP Resources.swift
[94/95] Compiling MCP Server.swift
[95/95] Compiling MCP Tools.swift
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/mattt/eventsource.git
[3/271] Fetching eventsource
[134/5872] Fetching eventsource, swift-system
[191/12145] Fetching eventsource, swift-system, swift-log
Fetched https://github.com/mattt/eventsource.git from cache (1.19s)
Fetched https://github.com/apple/swift-log.git from cache (1.19s)
Fetched https://github.com/apple/swift-system.git from cache (1.19s)
Computing version for https://github.com/mattt/eventsource.git
Computed https://github.com/mattt/eventsource.git at 1.4.1 (0.45s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.10.1 (0.48s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.4 (0.51s)
Creating working copy for https://github.com/mattt/eventsource.git
Working copy of https://github.com/mattt/eventsource.git resolved at 1.4.1
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.10.1
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.4
BUILD FAILURE 6.0 macosSpm