XGrammar – Build Information – Swift Package Index

Build Information

Failed to build XGrammar, reference 0.1.0 (e0f2de), with Swift 6.4 for Android on 24 Sep 2026 17:19:25 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mattt/swift-xgrammar.git
Reference: 0.1.0
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
 * tag               0.1.0      -> FETCH_HEAD
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 0.1.0
========================================
Build
========================================
Selected platform:         android
Swift version:             6.4
Building package at path:  $PWD
https://github.com/mattt/swift-xgrammar.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1
android-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:abadcff584c273feba50641b454858d377ba30b35ea7287a94f45ebd8afd0ea0
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:android-6.4-latest
Building for debugging...
[Planning deferred tasks]
[29 / 48] Cxgrammar
[30 / 48] Cxgrammar
[31 / 48] Cxgrammar
[32 / 48] Cxgrammar
[33 / 48] Cxgrammar
[35 / 48] Cxgrammar
[36 / 48] Cxgrammar
[38 / 48] Cxgrammar
[39 / 48] Cxgrammar
[41 / 58] Cxgrammar
[43 / 58] XGrammar
[43 / 58] Cxgrammar
[44 / 58] Cxgrammar
[46 / 58] XGrammar
[52 / 58] XGrammar
[53 / 58] XGrammar-product
[54 / 58] Cxgrammar
[55 / 58] Cxgrammar
error: SwiftCompile normal aarch64 /host/spi-builder-workspace/Sources/XGrammar/Bridging.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile Bridging.swift
/host/spi-builder-workspace/Sources/XGrammar/Bridging.swift:30:32: [1;31merror: [1;39mcannot find 'strdup' in scope[0;0m
[0;36m28 |[0;0m     cStrings.reserveCapacity(strings.count)
[0;36m29 |[0;0m     for string in strings {
[0;36m30 |[0;0m         guard let duplicated = [4;39mstrdup[0;0m(string) else {
   [0;36m|[0;0m                                `- [1;31merror: [1;39mcannot find 'strdup' in scope[0;0m
[0;36m31 |[0;0m             for ptr in cStrings {
[0;36m32 |[0;0m                 if let p = ptr { free(UnsafeMutablePointer(mutating: p)) }
/host/spi-builder-workspace/Sources/XGrammar/Bridging.swift:32:34: [1;31merror: [1;39mcannot find 'free' in scope[0;0m
[0;36m30 |[0;0m         guard let duplicated = strdup(string) else {
[0;36m31 |[0;0m             for ptr in cStrings {
[0;36m32 |[0;0m                 if let p = ptr { [4;39mfree[0;0m(UnsafeMutablePointer(mutating: p)) }
   [0;36m|[0;0m                                  `- [1;31merror: [1;39mcannot find 'free' in scope[0;0m
[0;36m33 |[0;0m             }
[0;36m34 |[0;0m             throw XGrammarError.runtimeError("Failed to allocate C string.")
/host/spi-builder-workspace/Sources/XGrammar/Bridging.swift:40:30: [1;31merror: [1;39mcannot find 'free' in scope[0;0m
[0;36m38 |[0;0m     defer {
[0;36m39 |[0;0m         for ptr in cStrings {
[0;36m40 |[0;0m             if let p = ptr { [4;39mfree[0;0m(UnsafeMutablePointer(mutating: p)) }
   [0;36m|[0;0m                              `- [1;31merror: [1;39mcannot find 'free' in scope[0;0m
[0;36m41 |[0;0m         }
[0;36m42 |[0;0m     }
Failed frontend command:
/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Sources/XGrammar/Bridging.swift /host/spi-builder-workspace/Sources/XGrammar/Compiler.swift /host/spi-builder-workspace/Sources/XGrammar/Configuration.swift /host/spi-builder-workspace/Sources/XGrammar/Errors.swift /host/spi-builder-workspace/Sources/XGrammar/Formatting.swift /host/spi-builder-workspace/Sources/XGrammar/Grammar.swift /host/spi-builder-workspace/Sources/XGrammar/Matcher.swift /host/spi-builder-workspace/Sources/XGrammar/TokenizerInfo.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.dia -target aarch64-unknown-linux-android28 -Xllvm -aarch64-use-tbi -disable-objc-interop -sdk /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -sysroot /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -I /host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 6 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins/testing\#/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_android.artifactbundle/swift-android/swift-resources/usr/lib/swift-aarch64 -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/lib/clang/18 -Xcc -fmodule-map-file\=/host/spi-builder-workspace/Sources/Cxgrammar/include/module.modulemap -Xcc -fno-omit-frame-pointer -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/host/spi-builder-workspace/Sources/Cxgrammar/include -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/DerivedSources-normal/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/DerivedSources/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name XGrammar -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/XGrammar_const_extract_protocols.json -in-process-plugin-server-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/local/lib/swift/host/plugins -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.o -index-unit-output-path /XGrammar.build/Debug-android-aarch64/XGrammar-t.build/Objects-normal/aarch64/Bridging.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 android