Swift Package Index

Build Information

Failed to build FlockKit, reference 1.0.0 (b8d4f6), with Swift 6.4 for Linux on 23 Sep 2026 13:38:27 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344845-1":/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:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/avnerbarr/FlockKit.git
Reference: 1.0.0
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/avnerbarr/FlockKit
 * tag               1.0.0      -> FETCH_HEAD
HEAD is now at b8d4f66 documentation
Cloned https://github.com/avnerbarr/FlockKit.git
Revision (git rev-parse @):
b8d4f663885455cf64387cfbbb5359762cde2441
SUCCESS checkout https://github.com/avnerbarr/FlockKit.git at 1.0.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.4
Building package at path:  $PWD
https://github.com/avnerbarr/FlockKit.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:c77fcce225e223ac0fafed844619173fc6de8d62dd560eeb28db3182af6a282b
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest
Building for debugging...
[Computing dependencies]
[Planning 1 / 95]
[Planning deferred tasks]
[26 / 38] FlockKit
[34 / 41] LockTestHelper-product
[35 / 41] FlockKit
error: SwiftCompile normal x86_64 /host/spi-builder-workspace/Sources/LockTestHelper/main.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile main.swift
/host/spi-builder-workspace/Sources/LockTestHelper/main.swift:20:24: error: reference to var 'stdout' is not concurrency-safe because it involves shared mutable state
18 |             try withExclusiveWriteLock(at: path, blocking: blocking) {
19 |                 print("LOCKED_EXCLUSIVE")
20 |                 fflush(stdout)
   |                        `- error: reference to var 'stdout' is not concurrency-safe because it involves shared mutable state
21 |                 sleep(UInt32(holdSeconds))
22 |             }
/usr/include/stdio.h:144:14: note: var declared here
142 | /* Standard streams.  */
143 | extern FILE *stdin;		/* Standard input stream.  */
144 | extern FILE *stdout;		/* Standard output stream.  */
    |              `- note: var declared here
145 | extern FILE *stderr;		/* Standard error output stream.  */
146 | /* C89/C99 say they're macros.  Make them happy.  */
/host/spi-builder-workspace/Sources/LockTestHelper/main.swift:26:24: error: reference to var 'stdout' is not concurrency-safe because it involves shared mutable state
24 |             try withSharedLock(at: path, blocking: blocking) {
25 |                 print("LOCKED_SHARED")
26 |                 fflush(stdout)
   |                        `- error: reference to var 'stdout' is not concurrency-safe because it involves shared mutable state
27 |                 sleep(UInt32(holdSeconds))
28 |             }
/usr/include/stdio.h:144:14: note: var declared here
142 | /* Standard streams.  */
143 | extern FILE *stdin;		/* Standard input stream.  */
144 | extern FILE *stdout;		/* Standard output stream.  */
    |              `- note: var declared here
145 | extern FILE *stderr;		/* Standard error output stream.  */
146 | /* C89/C99 say they're macros.  Make them happy.  */
Failed frontend command:
/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Sources/LockTestHelper/main.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.dia -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/spi-builder-workspace/.build/out/Products/Debug-linux-x86_64 -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 Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /usr/lib/swift/host/plugins/testing\#/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 -enable-anonymous-context-mangled-names -file-compilation-dir /host -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/.build/out/Products/Debug-linux-x86_64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/DerivedSources-normal/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/DerivedSources/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name LockTestHelper -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/LockTestHelper_const_extract_protocols.json -in-process-plugin-server-path /usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.o -index-unit-output-path /FlockKit.build/Debug-linux-x86_64/LockTestHelper-p.build/Objects-normal/x86_64/main.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 linux