Swift Package IndexBuild Information
Failed to build mcp-stdio-swift, reference main (1a5e0b), with Swift 6.0 for Linux on 8 Jan 2026 17:52:33 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1Build Log
========================================
RunAll
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Builder version: 4.68.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/xbill9/mcp-stdio-swift.git
Reference: main
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/xbill9/mcp-stdio-swift
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 1a5e0bc add settings.json for gemini cli
Cloned https://github.com/xbill9/mcp-stdio-swift.git
Revision (git rev-parse @):
1a5e0bc4601b79bafc196f7e1bd4bca79d0a8227
SUCCESS checkout https://github.com/xbill9/mcp-stdio-swift.git at main
========================================
Build
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Selected platform: linux
Swift version: 6.0
Building package at path: $PWD
https://github.com/xbill9/mcp-stdio-swift.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:d60f78d1b94eb114d4ebb72af8c32e902a28db13a75577d0341a88c358a803b4
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/modelcontextprotocol/swift-sdk
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Fetched https://github.com/swift-server/swift-service-lifecycle.git from cache (0.31s)
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Fetched https://github.com/modelcontextprotocol/swift-sdk from cache (0.46s)
Fetched https://github.com/apple/swift-log.git from cache (0.46s)
Computing version for https://github.com/modelcontextprotocol/swift-sdk
Computed https://github.com/modelcontextprotocol/swift-sdk at 0.10.2 (0.66s)
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Computing version for https://github.com/mattt/eventsource.git
Computed https://github.com/mattt/eventsource.git at 1.3.0 (0.62s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.8.0 (0.62s)
Computing version for https://github.com/swift-server/swift-service-lifecycle.git
Computed https://github.com/swift-server/swift-service-lifecycle.git at 2.9.1 (0.76s)
Fetching https://github.com/apple/swift-async-algorithms.git
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Fetched https://github.com/apple/swift-async-algorithms.git from cache (0.41s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.1 (0.82s)
Fetching https://github.com/apple/swift-collections.git
[1/18592] Fetching swift-collections
Fetched https://github.com/apple/swift-collections.git from cache (1.41s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.3.0 (1.14s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.3 (0.70s)
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.3
Creating working copy for https://github.com/mattt/eventsource.git
Working copy of https://github.com/mattt/eventsource.git resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.8.0
Creating working copy for https://github.com/swift-server/swift-service-lifecycle.git
Working copy of https://github.com/swift-server/swift-service-lifecycle.git resolved at 2.9.1
Creating working copy for https://github.com/apple/swift-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.1
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.3.0
Creating working copy for https://github.com/modelcontextprotocol/swift-sdk
Working copy of https://github.com/modelcontextprotocol/swift-sdk resolved at 0.10.2
Building for debugging...
[0/26] Write sources
[11/26] Compiling CSystem shims.c
[12/26] Write swift-version-24593BA9C3E375BF.txt
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[100/169] Compiling Logging Logging.swift
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[151/194] Wrapping AST for UnixSignals for debugging
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[168/194] Emitting module OrderedCollections
[169/195] Wrapping AST for OrderedCollections for debugging
[171/244] Emitting module AsyncAlgorithms
[172/250] Emitting module MCP
[173/252] Compiling AsyncAlgorithms MergeStateMachine.swift
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[239/253] Wrapping AST for AsyncAlgorithms for debugging
[241/261] Compiling ServiceLifecycle AsyncGracefulShutdownSequence.swift
[242/262] Compiling ServiceLifecycle AsyncCancelOnGracefulShutdownSequence.swift
[243/262] Emitting module ServiceLifecycle
[244/262] Compiling ServiceLifecycle GracefulShutdown.swift
[245/262] Compiling ServiceLifecycle ServiceGroupConfiguration.swift
[246/262] Compiling ServiceLifecycle ServiceRunnerError.swift
[247/262] Compiling ServiceLifecycle Service.swift
[248/262] Compiling ServiceLifecycle CancellationWaiter.swift
[249/262] Compiling ServiceLifecycle ServiceGroup.swift
[250/263] Wrapping AST for ServiceLifecycle for debugging
[260/264] Wrapping AST for MCP for debugging
[262/269] Compiling mcp_stdio_swift main.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
[263/269] Compiling mcp_stdio_swift MCPService.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
[264/269] Compiling mcp_stdio_swift JSONLogHandler.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
error: emit-module command failed with exit code 1 (use -v to see invocation)
[265/269] Emitting module mcp_stdio_swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
[266/269] Compiling mcp_stdio_swift Handlers.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
BUILD FAILURE 6.0 linux