Swift Package IndexBuild Information
Failed to build mlx-swift, reference 0.31.3 (61b9e0), with Swift 6.2 for Wasm on 2 Apr 2026 00:36:28 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.2-latest swift build --swift-sdk wasm32-unknown-wasip1 2>&1Build Log
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RunAll
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Builder version: 4.69.2
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/ml-explore/mlx-swift.git
Reference: 0.31.3
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/ml-explore/mlx-swift
* tag 0.31.3 -> FETCH_HEAD
HEAD is now at 61b9e01 hold evalLock during mlx_save_safetensors etc (#379)
Submodule path 'Source/Cmlx/mlx': checked out 'ce45c52505c8158ea48d2a54e8caae05efd86bfe'
Submodule path 'Source/Cmlx/mlx-c': checked out '0726ca922fc902c4c61ef9c27d94132be418e945'
Submodule 'submodules/mlx' (https://github.com/ml-explore/mlx) registered for path 'Source/Cmlx/mlx'
Submodule 'submodules/mlx-c' (https://github.com/ml-explore/mlx-c) registered for path 'Source/Cmlx/mlx-c'
Cloning into '/host/spi-builder-workspace/Source/Cmlx/mlx'...
Cloning into '/host/spi-builder-workspace/Source/Cmlx/mlx-c'...
Cloned https://github.com/ml-explore/mlx-swift.git
Revision (git rev-parse @):
61b9e011e09a62b489f6bd647958f1555bdf2896
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/ml-explore/mlx-swift.git at 0.31.3
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Build
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Selected platform: wasm
Swift version: 6.2
Building package at path: $PWD
https://github.com/ml-explore/mlx-swift.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.2-latest swift build --swift-sdk wasm32-unknown-wasip1 2>&1
wasm-6.2-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:de1420b02d93a9deec3e168cca69275e06e27da7632503e71651af6daad007b1
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.2-latest
warning: multiple Swift SDKs match target triple `wasm32-unknown-wasip1` and host triple x86_64-unknown-linux-gnu, selected one at /root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/embedded-swift-sdk.json
Fetching https://github.com/apple/swift-numerics
[1/6416] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (0.83s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.1.1 (1.33s)
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.1.1
warning: 'spi-builder-workspace': found 3 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/host/spi-builder-workspace/Source/Examples/CustomFunctionExample.swift
/host/spi-builder-workspace/Source/Examples/CustomFunctionExampleSimple.swift
/host/spi-builder-workspace/Source/Examples/Example1.swift
warning: 'spi-builder-workspace': found 3 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/host/spi-builder-workspace/Source/Examples/CustomFunctionExample.swift
/host/spi-builder-workspace/Source/Examples/CustomFunctionExampleSimple.swift
/host/spi-builder-workspace/Source/Examples/Tutorial.swift
warning: 'spi-builder-workspace': found 3 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/host/spi-builder-workspace/Source/Examples/CustomFunctionExample.swift
/host/spi-builder-workspace/Source/Examples/Example1.swift
/host/spi-builder-workspace/Source/Examples/Tutorial.swift
warning: 'spi-builder-workspace': found 3 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/host/spi-builder-workspace/Source/Examples/Example1.swift
/host/spi-builder-workspace/Source/Examples/CustomFunctionExampleSimple.swift
/host/spi-builder-workspace/Source/Examples/Tutorial.swift
Building for debugging...
[0/180] Write swift-version-24593BA9C3E375BF.txt
[1/180] Compiling _NumericsShims _NumericsShims.c
[1/180] Write sources
error: emit-module command failed with exit code 1 (use -v to see invocation)
[8/182] Emitting module RealModule
<unknown>:0: error: module compiled with Swift 6.2 cannot be imported by the Swift 6.2.4 compiler: /root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift/embedded/Swift.swiftmodule/wasm32-unknown-wasip1.swiftmodule
[9/182] Compiling RealModule AlgebraicField.swift
<unknown>:0: error: module compiled with Swift 6.2 cannot be imported by the Swift 6.2.4 compiler: /root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-RELEASE_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift/embedded/Swift.swiftmodule/wasm32-unknown-wasip1.swiftmodule
[9/182] Compiling linalg.cpp
[9/182] Compiling map.cpp
[9/182] Compiling array.cpp
[9/182] Compiling export.cpp
[9/182] Compiling error.cpp
[9/182] Compiling device.cpp
[9/182] Compiling closure.cpp
BUILD FAILURE 6.2 wasm