Swift Package Index

Build Information

Failed to build mlx-libraries, reference main (357c97), with Swift 6.3 for Wasm on 20 Apr 2026 17:17:04 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ml-explore/mlx-swift-examples.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-examples
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 357c97f mlx-swift-examples prep for mlx-swift-lm 3.x release (#468)
Cloned https://github.com/ml-explore/mlx-swift-examples.git
Revision (git rev-parse @):
357c97fbd39abe600704b889dd114c208b0ed915
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/ml-explore/mlx-swift-examples.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/ml-explore/mlx-swift-examples.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$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
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Building for debugging...
[0/565] Write sources
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[34/565] 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.
[35/565] Compiling scheduler.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);
      |                                 ^~~~~
[35/565] Compiling linalg.cpp
[35/565] Compiling primitives.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);
      |                                 ^~~~~
[35/565] Compiling ops.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;
      |   ~~~~~^
/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);
      |                                 ^~~~~
[35/565] Compiling transforms.cpp
[35/565] Compiling utils.cpp
[35/565] Compiling yyjson.c
[35/565] Compiling random.cpp
BUILD FAILURE 6.3 wasm