Swift Package IndexBuild Information
Failed to build mlx-swift-lm, reference main (7e2b71), with Swift 6.3 for Wasm on 20 Apr 2026 05:53:53 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
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ml-explore/mlx-swift-lm.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/ml-explore/mlx-swift-lm
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 7e2b710 add fallback links to the readme -- docs are not yet built (#218)
Cloned https://github.com/ml-explore/mlx-swift-lm.git
Revision (git rev-parse @):
7e2b7107be52ffbfe488f3c7987d3f52c1858b4b
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/ml-explore/mlx-swift-lm.git at main
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/ml-explore/mlx-swift-lm.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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/ml-explore/mlx-swift
Fetching https://github.com/swiftlang/swift-syntax.git
[1/14220] Fetching mlx-swift
[712/89201] Fetching mlx-swift, swift-syntax
Fetched https://github.com/ml-explore/mlx-swift from cache (9.04s)
Fetched https://github.com/swiftlang/swift-syntax.git from cache (9.09s)
Computing version for https://github.com/ml-explore/mlx-swift
Computed https://github.com/ml-explore/mlx-swift at 0.31.3 (9.74s)
Fetching https://github.com/apple/swift-numerics
[1/6416] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (0.47s)
Computing version for https://github.com/swiftlang/swift-syntax.git
Computed https://github.com/swiftlang/swift-syntax.git at 603.0.0 (3.23s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.1.1 (0.40s)
Creating working copy for https://github.com/ml-explore/mlx-swift
Working copy of https://github.com/ml-explore/mlx-swift resolved at 0.31.3
Creating working copy for https://github.com/swiftlang/swift-syntax.git
Working copy of https://github.com/swiftlang/swift-syntax.git resolved at 603.0.0
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.1.1
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/603.0.0/swift-6.3-RELEASE-ubuntu_jammy_x86_64-MacroSupport.tar.gz
Downloaded https://download.swift.org/prebuilts/swift-syntax/603.0.0/swift-6.3-RELEASE-ubuntu_jammy_x86_64-MacroSupport.tar.gz (0.62s)
Building for debugging...
[0/167] Write sources
[13/167] Compiling _NumericsShims _NumericsShims.c
[14/167] Compiling version.cpp
[15/167] Write swift-version-24593BA9C3E375BF.txt
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:19:8: error: no type named 'mutex' in namespace 'std'
19 | std::mutex mtx;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:21:8: error: no type named 'condition_variable' in namespace 'std'
21 | std::condition_variable cond;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:23:8: error: no type named 'thread' in namespace 'std'
23 | std::thread thread;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:29:28: error: no member named 'mutex' in namespace 'std'
29 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:40:31: error: no member named 'mutex' in namespace 'std'
40 | std::unique_lock<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:56:28: error: no member named 'mutex' in namespace 'std'
56 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:160:8: error: no type named 'condition_variable' in namespace 'std'
160 | std::condition_variable completion_cv;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:161:8: error: no type named 'mutex' in namespace 'std'
161 | std::mutex mtx;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:112:28: error: no member named 'mutex' in namespace 'std'
112 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:120:28: error: no member named 'mutex' in namespace 'std'
120 | std::lock_guard<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.h:131:27: error: no member named 'mutex' in namespace 'std'
131 | std::unique_lock<std::mutex> lk(mtx);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:47:36: error: no member named 'promise' in namespace 'std'
47 | auto p = std::make_shared<std::promise<void>>();
| ^~~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:47:48: error: expected '(' for function-style cast or type construction
47 | auto p = std::make_shared<std::promise<void>>();
| ~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:47:51: error: expected expression
47 | auto p = std::make_shared<std::promise<void>>();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:48:10: error: no member named 'future' in namespace 'std'
48 | std::future<void> f = p->get_future();
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:48:21: error: expected '(' for function-style cast or type construction
48 | std::future<void> f = p->get_future();
| ~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:48:23: error: use of undeclared identifier 'f'
48 | std::future<void> f = p->get_future();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/scheduler.cpp:50:5: error: use of undeclared identifier 'f'
50 | f.wait();
| ^
18 errors generated.
[16/167] Compiling scheduler.cpp
[16/167] Compiling transforms.cpp
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/ops.cpp:14:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/fast_primitives.h:6:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/primitives.h:10:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/io/load.h:16:
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:40:15: error: no template named 'future' in namespace 'std'
40 | -> std::future<typename std::invoke_result_t<F, Args...>>;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:48:20: error: no member named 'thread' in namespace 'std'
48 | std::vector<std::thread> workers;
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:50:8: error: no type named 'mutex' in namespace 'std'
50 | std::mutex queue_mutex;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:51:8: error: no type named 'condition_variable' in namespace 'std'
51 | std::condition_variable condition;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:61:13: error: no template named 'future' in namespace 'std'
61 | -> std::future<typename std::invoke_result_t<F, Args...>> {
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:64:37: error: no member named 'packaged_task' in namespace 'std'
64 | auto task = std::make_shared<std::packaged_task<return_type()>>(
| ^~~~~~~~~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:8: error: no member named 'future' in namespace 'std'
67 | std::future<return_type> res = task->get_future();
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:15: error: unexpected type name 'return_type': expected expression
67 | std::future<return_type> res = task->get_future();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:28: error: use of undeclared identifier 'res'
67 | std::future<return_type> res = task->get_future();
| ^~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:69:27: error: no member named 'mutex' in namespace 'std'
69 | std::unique_lock<std::mutex> lock(queue_mutex);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:79:10: error: use of undeclared identifier 'res'
79 | return res;
| ^~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:100:27: error: no member named 'mutex' in namespace 'std'
100 | std::unique_lock<std::mutex> lock(queue_mutex);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:104:13: error: no type named 'thread' in namespace 'std'
104 | for (std::thread& worker : workers) {
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:120:33: error: no member named 'mutex' in namespace 'std'
120 | std::unique_lock<std::mutex> lock(this->queue_mutex);
| ^~~~~
[16/167] Compiling ops.cpp
[16/167] Compiling utils.cpp
[16/167] Compiling safetensors.cpp
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/linalg.cpp:8:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/primitives.h:10:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/io/load.h:16:
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:40:15: error: no template named 'future' in namespace 'std'
40 | -> std::future<typename std::invoke_result_t<F, Args...>>;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:48:20: error: no member named 'thread' in namespace 'std'
48 | std::vector<std::thread> workers;
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:50:8: error: no type named 'mutex' in namespace 'std'
50 | std::mutex queue_mutex;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:51:8: error: no type named 'condition_variable' in namespace 'std'
51 | std::condition_variable condition;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:61:13: error: no template named 'future' in namespace 'std'
61 | -> std::future<typename std::invoke_result_t<F, Args...>> {
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:64:37: error: no member named 'packaged_task' in namespace 'std'
64 | auto task = std::make_shared<std::packaged_task<return_type()>>(
| ^~~~~~~~~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:8: error: no member named 'future' in namespace 'std'
67 | std::future<return_type> res = task->get_future();
| ^~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:15: error: unexpected type name 'return_type': expected expression
67 | std::future<return_type> res = task->get_future();
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:67:28: error: use of undeclared identifier 'res'
67 | std::future<return_type> res = task->get_future();
| ^~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:69:27: error: no member named 'mutex' in namespace 'std'
69 | std::unique_lock<std::mutex> lock(queue_mutex);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:79:10: error: use of undeclared identifier 'res'
79 | return res;
| ^~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:100:27: error: no member named 'mutex' in namespace 'std'
100 | std::unique_lock<std::mutex> lock(queue_mutex);
| ^~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:104:13: error: no type named 'thread' in namespace 'std'
104 | for (std::thread& worker : workers) {
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:120:33: error: no member named 'mutex' in namespace 'std'
120 | std::unique_lock<std::mutex> lock(this->queue_mutex);
| ^~~~~
[16/167] Compiling linalg.cpp
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/random.cpp:8:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/primitives.h:10:
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/io/load.h:16:
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/threadpool.h:40:15: error: no template named 'future' in namespace 'std'
40 | -> std::future<typename std::invoke_result_t<F, Args...>>;
| ~~~~~^
[16/167] Compiling random.cpp
[16/167] Compiling primitives.cpp
BUILD FAILURE 6.3 wasm