Swift Package Index

Build Information

Failed to build SwiftMarkdown, reference main (aee5f0), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 23:17:38 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/vapor-community/markdown.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vapor-community/markdown
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at aee5f05 Use the modern CI (#16)
Cloned https://github.com/vapor-community/markdown.git
Revision (git rev-parse @):
aee5f0590bb3114298e579192b678d18ab8f4b76
SUCCESS checkout https://github.com/vapor-community/markdown.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/vapor-community/markdown.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Pre-planning 1 / 97]
[Planning deferred tasks]
[23 / 101]
[33 / 102] cmark
[64 / 113]
[67 / 115] SwiftMarkdown
[82 / 128] cmark
[99 / 128] cmark
[112 / 128] cmark
[115 / 128]
[117 / 128] SwiftMarkdown
[124 / 128] cmark
[125 / 128] SwiftMarkdown
Fetching https://github.com/brokenhandsio/cmark-gfm.git
[1/12300] Fetching cmark-gfm
Fetched https://github.com/brokenhandsio/cmark-gfm.git (1.95s)
Computing version for https://github.com/brokenhandsio/cmark-gfm.git
Computed https://github.com/brokenhandsio/cmark-gfm.git at 2.1.0 (2.61s)
Creating working copy for https://github.com/brokenhandsio/cmark-gfm.git
Working copy of https://github.com/brokenhandsio/cmark-gfm.git resolved at 2.1.0
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile SwiftMarkdown.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift:36:9: error: cannot find 'free' in scope
34 |
35 |         buffer = String(cString: buf)
36 |         free(buf)
   |         `- error: cannot find 'free' in scope
37 |     }
38 |     guard let output = buffer else {
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/admin/builder/spi-builder-workspace/Sources/SwiftMarkdown/SwiftMarkdown.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.dia -target arm64-apple-macos12.0 -disable-cross-import-overlay-search -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/PackageFrameworks -F /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftExplicitPrecompiledModules -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder -Xcc -fmodule-map-file\=/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/GeneratedModuleMaps/cmark.modulemap -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/checkouts/cmark-gfm/Sources/cmark/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SwiftMarkdown -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown_const_extract_protocols.json -disable-clang-spi -clang-target arm64-apple-macos27.0 -target-sdk-version 27.0 -target-sdk-name macosx27.0 -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.o -debug-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.swiftmodule -index-unit-output-path /SwiftMarkdown.build/Debug/SwiftMarkdown-t.build/Objects-normal/arm64/SwiftMarkdown.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm