Swift Package IndexBuild Information
Failed to build swift-midi-ui, reference main (1e697b), with Swift 6.1 for Linux on 4 Oct 2026 01:22:04 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-54344843-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1Build Log
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RunAll
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Builder version: 5.1.1
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/orchetect/swift-midi-ui.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/orchetect/swift-midi-ui
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 1e697b6 Updated package manifest with GitHub Actions env var applied to all targets
Cloned https://github.com/orchetect/swift-midi-ui.git
Revision (git rev-parse @):
1e697b6ca38445712b720603bde6bfec79bbb39c
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/orchetect/swift-midi-ui.git at main
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Build
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Selected platform: linux
Swift version: 6.1
Building package at path: $PWD
https://github.com/orchetect/swift-midi-ui.git
https://github.com/orchetect/swift-midi-ui.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1
basic-6.1-latest: Pulling from saguaro1/spi-images
Digest: sha256:bebe373f64586285d153a73cebf57004d534988a7110464fd581e50dd24c756b
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:basic-6.1-latest
Fetching https://github.com/orchetect/swift-midi-core
Fetching https://github.com/orchetect/swift-midi-io
[1/1714] Fetching swift-midi-io
[19/3736] Fetching swift-midi-io, swift-midi-core
Fetched https://github.com/orchetect/swift-midi-io from cache (0.42s)
Fetched https://github.com/orchetect/swift-midi-core from cache (0.42s)
Computing version for https://github.com/orchetect/swift-midi-io
Computed https://github.com/orchetect/swift-midi-io at 1.1.0 (0.82s)
Computing version for https://github.com/orchetect/swift-midi-core
Computed https://github.com/orchetect/swift-midi-core at 1.0.2 (0.31s)
Creating working copy for https://github.com/orchetect/swift-midi-io
Working copy of https://github.com/orchetect/swift-midi-io resolved at 1.1.0
Creating working copy for https://github.com/orchetect/swift-midi-core
Working copy of https://github.com/orchetect/swift-midi-core resolved at 1.0.2
Building for debugging...
[0/5] Write sources
[4/5] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/29] Emitting module SwiftMIDIInternals
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/.build/checkouts/swift-midi-core/Sources/SwiftMIDIInternals/Utilities/Threading and Synchronization/Main Queue Utilities.swift:13:13: error: let 'mainQueueKey' is not concurrency-safe because non-'Sendable' type 'DispatchSpecificKey<UInt8>' may have shared mutable state
11 |
12 | // We store the dispatch key and value globally so they aren't bound to the generic type
13 | private let mainQueueKey = DispatchSpecificKey<UInt8>()
| `- error: let 'mainQueueKey' is not concurrency-safe because non-'Sendable' type 'DispatchSpecificKey<UInt8>' may have shared mutable state
14 | private let mainQueueValue: UInt8 = 1
15 |
Dispatch.DispatchSpecificKey:1:20: note: generic class 'DispatchSpecificKey' does not conform to the 'Sendable' protocol
1 | final public class DispatchSpecificKey<T> {
| `- note: generic class 'DispatchSpecificKey' does not conform to the 'Sendable' protocol
2 | public init()
3 | deinit
[7/31] Compiling SwiftMIDIIO SwiftMIDIIO.swift
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/.build/checkouts/swift-midi-io/Sources/Unsupported/SwiftMIDIIO.swift:10:8: error: no such module 'CoreMIDI'
8 |
9 | // artificially cause the build to fail by attempting to import an Apple-only framework
10 | import CoreMIDI
| `- error: no such module 'CoreMIDI'
11 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[8/31] Emitting module SwiftMIDIIO
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/.build/checkouts/swift-midi-io/Sources/Unsupported/SwiftMIDIIO.swift:10:8: error: no such module 'CoreMIDI'
8 |
9 | // artificially cause the build to fail by attempting to import an Apple-only framework
10 | import CoreMIDI
| `- error: no such module 'CoreMIDI'
11 |
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.1-latest: Pulling from saguaro1/spi-images
Digest: sha256:bebe373f64586285d153a73cebf57004d534988a7110464fd581e50dd24c756b
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:basic-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/25] Compiling SwiftMIDIIO SwiftMIDIIO.swift
/host/spi-builder-workspace/.build/checkouts/swift-midi-io/Sources/Unsupported/SwiftMIDIIO.swift:10:8: error: no such module 'CoreMIDI'
8 |
9 | // artificially cause the build to fail by attempting to import an Apple-only framework
10 | import CoreMIDI
| `- error: no such module 'CoreMIDI'
11 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/25] Emitting module SwiftMIDIIO
/host/spi-builder-workspace/.build/checkouts/swift-midi-io/Sources/Unsupported/SwiftMIDIIO.swift:10:8: error: no such module 'CoreMIDI'
8 |
9 | // artificially cause the build to fail by attempting to import an Apple-only framework
10 | import CoreMIDI
| `- error: no such module 'CoreMIDI'
11 |
BUILD FAILURE 6.1 linux