Swift Package IndexBuild Information
Failed to build mlx-swift-lm, reference main (a2e01f), with Swift 6.1 for Wasm on 9 May 2026 01:39:28 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1Build Log
========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/DePasqualeOrg/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/DePasqualeOrg/mlx-swift-lm
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at a2e01f7 Fix model implementations
Cloned https://github.com/DePasqualeOrg/mlx-swift-lm.git
Revision (git rev-parse @):
a2e01f72b0581cbac1e1d9effb4f3aead5123619
SUCCESS checkout https://github.com/DePasqualeOrg/mlx-swift-lm.git at main
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.1
Building package at path: $PWD
https://github.com/DePasqualeOrg/mlx-swift-lm.git
https://github.com/DePasqualeOrg/mlx-swift-lm.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi -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
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
Fetching https://github.com/ml-explore/mlx-swift
[1/14250] Fetching mlx-swift
Fetched https://github.com/ml-explore/mlx-swift from cache (1.33s)
Computing version for https://github.com/ml-explore/mlx-swift
Computed https://github.com/ml-explore/mlx-swift at 0.31.3 (4.51s)
Fetching https://github.com/apple/swift-numerics
[1/6416] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (1.92s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.1.1 (2.59s)
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/ml-explore/mlx-swift
Working copy of https://github.com/ml-explore/mlx-swift resolved at 0.31.3
Building for debugging...
[0/162] Write sources
[9/162] Write swift-version-24593BA9C3E375BF.txt
[10/162] Compiling _NumericsShims _NumericsShims.c
[11/162] Write sources
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:53:8: error: no type named 'mutex' in namespace 'std'
53 | std::mutex mutex_;
| ~~~~~^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:37:21: error: expected ';' after expression
37 | std::unique_lock lk(mutex_);
| ^
| ;
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:37:10: error: no member named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
37 | std::unique_lock lk(mutex_);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:44:21: error: expected ';' after expression
44 | std::unique_lock lk(mutex_);
| ^
| ;
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:44:10: error: no member named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
44 | std::unique_lock lk(mutex_);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:69:10: error: non-const lvalue reference to type 'Allocator' cannot bind to a value of unrelated type 'CommonAllocator'
69 | return common_allocator();
| ^~~~~~~~~~~~~~~~~~
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:84:19: error: expected ';' after expression
84 | std::unique_lock lk(mutex_);
| ^
| ;
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:84:8: error: no member named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
84 | std::unique_lock lk(mutex_);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:93:19: error: expected ';' after expression
93 | std::unique_lock lk(mutex_);
| ^
| ;
/host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/backend/no_gpu/allocator.cpp:93:8: error: no member named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
93 | std::unique_lock lk(mutex_);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
10 errors generated.
[12/173] Compiling allocator.cpp
[12/173] Compiling no_cuda.cpp
[13/173] Emitting module RealModule
[13/173] Compiling no_metal.cpp
[13/173] Compiling device.cpp
[13/173] Compiling compile.cpp
[13/173] Compiling format.cc
[13/173] Compiling cuda.cpp
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1
wasm-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:276d66a16377d3ee059b2e3429cbc1154d9f01e42871e5d702fd5d8b9044d93d
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.1-latest
[0/1] Planning build
Building for debugging...
[0/150] Write sources
[2/151] Compiling version.cpp
[3/151] 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:40:14: error: no template named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
40 | std::unique_lock<std::mutex> lk(mtx);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
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: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:41:19: error: use of undeclared identifier 'lk'
41 | cond.wait(lk, [this] { return !this->q.empty() || this->stop; });
| ^
/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:131:10: error: no template named 'unique_lock' in namespace 'std'; did you mean 'unique_copy'?
131 | std::unique_lock<std::mutex> lk(mtx);
| ~~~~~^~~~~~~~~~~
| unique_copy
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/c++/v1/__algorithm/unique_copy.h:102:1: note: 'unique_copy' declared here
102 | unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
| ^
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: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.h:134:26: error: use of undeclared identifier 'lk'
134 | completion_cv.wait(lk, [this, n_tasks_old] {
| ^
/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();
| ~~~~~^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
[4/151] Compiling scheduler.cpp
[4/151] Compiling utils.cpp
[4/151] Compiling linalg.cpp
[4/151] Compiling primitives.cpp
In file included from /host/spi-builder-workspace/.build/checkouts/mlx-swift/Source/Cmlx/mlx/mlx/transforms.cpp:17:
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;
| ~~~~~^
[4/151] Compiling transforms.cpp
[4/151] Compiling safetensors.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...>>;
| ~~~~~^
[4/151] Compiling ops.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...>>;
| ~~~~~^
[4/151] Compiling random.cpp
BUILD FAILURE 6.1 wasm