Swift Package IndexBuild Information
Failed to build mlx-libraries, reference 2.29.1 (9bff95), with Swift 6.3 for Wasm on 17 Apr 2026 06:46:22 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1Build Log
========================================
RunAll
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Builder version: 4.70.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/ml-explore/mlx-swift-examples.git
Reference: 2.29.1
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-examples
* tag 2.29.1 -> FETCH_HEAD
HEAD is now at 9bff95c mlx-swift 0.29.1 (#411)
Cloned https://github.com/ml-explore/mlx-swift-examples.git
Revision (git rev-parse @):
9bff95ca5f0b9e8c021acc4d71a2bbe4a7441631
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/ml-explore/mlx-swift-examples.git at 2.29.1
========================================
Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/ml-explore/mlx-swift-examples.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d69f4e7582c319245442d62a08b2d7c7fd5a0c0c69f5d2ef11d1530cd8d3329b
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest
Fetching https://github.com/huggingface/swift-transformers
Fetching https://github.com/1024jp/GzipSwift
Fetching https://github.com/ml-explore/mlx-swift
[1/1557] Fetching gzipswift
[1558/7793] Fetching gzipswift, swift-transformers
[1995/22013] Fetching gzipswift, swift-transformers, mlx-swift
Fetched https://github.com/1024jp/GzipSwift from cache (0.28s)
[580/20456] Fetching swift-transformers, mlx-swift
Fetched https://github.com/huggingface/swift-transformers from cache (1.19s)
Fetched https://github.com/ml-explore/mlx-swift from cache (1.76s)
Computing version for https://github.com/1024jp/GzipSwift
Computed https://github.com/1024jp/GzipSwift at 6.0.1 (4.06s)
Computing version for https://github.com/huggingface/swift-transformers
Computed https://github.com/huggingface/swift-transformers at 1.0.0 (0.45s)
Fetching https://github.com/huggingface/swift-jinja.git
[1/1051] Fetching swift-jinja
Fetched https://github.com/huggingface/swift-jinja.git from cache (0.41s)
Computing version for https://github.com/ml-explore/mlx-swift
Computed https://github.com/ml-explore/mlx-swift at 0.29.1 (1.16s)
Fetching https://github.com/apple/swift-numerics
[1/6416] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (0.59s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.1.1 (1.24s)
Computing version for https://github.com/huggingface/swift-jinja.git
Computed https://github.com/huggingface/swift-jinja.git at 2.3.5 (0.61s)
Fetching https://github.com/apple/swift-collections.git
[1/23569] Fetching swift-collections
Fetched https://github.com/apple/swift-collections.git from cache (1.47s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.4.1 (2.11s)
Creating working copy for https://github.com/ml-explore/mlx-swift
Working copy of https://github.com/ml-explore/mlx-swift resolved at 0.29.1
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.1.1
Creating working copy for https://github.com/1024jp/GzipSwift
Working copy of https://github.com/1024jp/GzipSwift resolved at 6.0.1
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.4.1
Creating working copy for https://github.com/huggingface/swift-jinja.git
Working copy of https://github.com/huggingface/swift-jinja.git resolved at 2.3.5
Creating working copy for https://github.com/huggingface/swift-transformers
Working copy of https://github.com/huggingface/swift-transformers resolved at 1.0.0
Building for debugging...
[0/193] Write sources
[7/193] Copying gpt2_tokenizer_config.json
[8/193] Copying t5_tokenizer_config.json
[9/193] Write sources
[19/193] Compiling system-zlib anchor.c
[20/193] Write sources
[25/193] Compiling _NumericsShims _NumericsShims.c
[26/193] Write sources
[27/193] Write swift-version-24593BA9C3E375BF.txt
[28/193] Compiling version.cpp
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:3:
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:18:8: error: no type named 'mutex' in namespace 'std'
18 | std::mutex mtx;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:20:8: error: no type named 'condition_variable' in namespace 'std'
20 | std::condition_variable cond;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:22:8: error: no type named 'thread' in namespace 'std'
22 | std::thread thread;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:28:28: error: no member named 'mutex' in namespace 'std'
28 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:39:31: error: no member named 'mutex' in namespace 'std'
39 | std::unique_lock<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:55:28: error: no member named 'mutex' in namespace 'std'
55 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:152:8: error: no type named 'condition_variable' in namespace 'std'
152 | std::condition_variable completion_cv;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:153:8: error: no type named 'mutex' in namespace 'std'
153 | std::mutex mtx;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:108:28: error: no member named 'mutex' in namespace 'std'
108 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:116:28: error: no member named 'mutex' in namespace 'std'
116 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:127:27: error: no member named 'mutex' in namespace 'std'
127 | std::unique_lock<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:43:36: error: no member named 'promise' in namespace 'std'
43 | auto p = std::make_shared<std::promise<void>>();
| ^~~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:43:48: error: expected '(' for function-style cast or type construction
43 | auto p = std::make_shared<std::promise<void>>();
| ~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:43:51: error: expected expression
43 | auto p = std::make_shared<std::promise<void>>();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:44:10: error: no member named 'future' in namespace 'std'
44 | std::future<void> f = p->get_future();
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:44:21: error: expected '(' for function-style cast or type construction
44 | std::future<void> f = p->get_future();
| ~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:44:23: error: use of undeclared identifier 'f'
44 | std::future<void> f = p->get_future();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:46:5: error: use of undeclared identifier 'f'
46 | f.wait();
| ^
18 errors generated.
[29/204] Compiling scheduler.cpp
[29/204] Compiling ops.cpp
[29/204] Compiling utils.cpp
[29/204] Compiling transforms.cpp
[29/204] Compiling linalg.cpp
[29/204] Compiling random.cpp
[29/204] Compiling primitives.cpp
BUILD FAILURE 6.3 wasm