Swift Package IndexBuild Information
Failed to build XGrammar, reference main (e0f2de), with Swift 6.3 for Wasm on 19 Apr 2026 20:20:22 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-6.3-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.
========================================
Checkout
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Clone URL: https://github.com/mattt/swift-xgrammar.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/mattt/swift-xgrammar
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at e0f2de3 Add CI workflow (#1)
Cloned https://github.com/mattt/swift-xgrammar.git
Revision (git rev-parse @):
e0f2de361aa4891dbca5113629bc90ab8e5c3888
SUCCESS checkout https://github.com/mattt/swift-xgrammar.git at main
========================================
Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/mattt/swift-xgrammar.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-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
Building for debugging...
[0/21] Write sources
[1/21] Compiling logging.cc
[2/21] Compiling Cxgrammar bridging.cc
[3/21] Compiling recursion_guard.cc
[4/21] Compiling config.cc
[5/21] Compiling testing.cc
[6/21] Compiling tokenizer_info.cc
[7/21] Compiling regex_converter.cc
[8/21] Compiling grammar_printer.cc
[9/21] Compiling compiled_grammar.cc
[10/21] Write swift-version-24593BA9C3E375BF.txt
[11/21] Compiling json_schema_converter.cc
In file included from /host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:27:
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:71:46: error: no template named 'shared_future' in namespace 'std'; did you mean 'shared_ptr'?
71 | auto Submit(F&& f, Args&&... args) -> std::shared_future<std::invoke_result_t<F, Args...>> {
| ~~~~~^~~~~~~~~~~~~
| shared_ptr
/root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/c++/v1/__memory/shared_ptr.h:307:38: note: 'shared_ptr' declared here
307 | class _LIBCPP_SHARED_PTR_TRIVIAL_ABI shared_ptr {
| ^
In file included from /host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:27:
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:160:20: error: no member named 'thread' in namespace 'std'; did you mean 'fread'?
160 | std::vector<std::thread> workers_;
| ^~~~~~
| fread
/root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/c++/v1/cstdio:144:9: note: 'fread' declared here
144 | using ::fread _LIBCPP_USING_IF_EXISTS;
| ^
In file included from /host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:27:
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:160:15: error: template argument for template type parameter must be a type
160 | std::vector<std::thread> workers_;
| ^~~~~~~~~~~
/root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/c++/v1/__vector/vector.h:87:17: note: template parameter is declared here
87 | template <class _Tp, class _Allocator /* = allocator<_Tp> */>
| ^
In file included from /host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:27:
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:164:8: error: no type named 'mutex' in namespace 'std'
164 | std::mutex queue_mutex_;
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:166:8: error: no type named 'condition_variable' in namespace 'std'
166 | std::condition_variable queue_condition_;
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:168:8: error: no type named 'condition_variable' in namespace 'std'
168 | std::condition_variable tasks_done_condition_;
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:36:40: error: no member named 'thread' in namespace 'std'
36 | ThreadPool(size_t num_threads = std::thread::hardware_concurrency()) {
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:44:35: error: no member named 'mutex' in namespace 'std'
44 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:75:39: error: no member named 'packaged_task' in namespace 'std'
75 | auto task = std::make_shared<std::packaged_task<return_type()>>(
| ^~~~~~~~~~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:79:10: error: no template named 'shared_future' in namespace 'std'; did you mean 'shared_ptr'?
79 | std::shared_future<return_type> res = task->get_future().share();
| ~~~~~^~~~~~~~~~~~~
| shared_ptr
/root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/c++/v1/__memory/shared_ptr.h:307:38: note: 'shared_ptr' declared here
307 | class _LIBCPP_SHARED_PTR_TRIVIAL_ABI shared_ptr {
| ^
In file included from /host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:27:
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:82:29: error: no member named 'mutex' in namespace 'std'
82 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:104:29: error: no member named 'mutex' in namespace 'std'
104 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:115:27: error: no member named 'mutex' in namespace 'std'
115 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:128:29: error: no member named 'mutex' in namespace 'std'
128 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:134:15: error: no type named 'thread' in namespace 'std'
134 | for (std::thread& worker : workers_) {
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/support/thread_pool.h:152:27: error: no member named 'mutex' in namespace 'std'
152 | std::unique_lock<std::mutex> lock(queue_mutex_);
| ^~~~~
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:430:53: error: no member named 'thread' in namespace 'std'
430 | if (num_threads > static_cast<int32_t>(std::thread::hardware_concurrency())) {
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:433:62: error: no member named 'thread' in namespace 'std'
433 | << static_cast<int32_t>(std::thread::hardware_concurrency())
| ~~~~~^
/host/spi-builder-workspace/Sources/Cxgrammar/cpp/grammar_matcher.cc:437:61: error: no member named 'thread' in namespace 'std'
437 | std::min(num_threads, static_cast<int32_t>(std::thread::hardware_concurrency()));
| ~~~~~^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
[12/21] Compiling grammar_matcher.cc
[12/21] Compiling fsm.cc
[12/21] Compiling grammar.cc
[12/21] Compiling grammar_functor.cc
[12/21] Compiling fsm_builder.cc
[12/21] Compiling grammar_compiler.cc
[12/21] Compiling grammar_parser.cc
[12/21] Compiling structural_tag.cc
BUILD FAILURE 6.3 wasm