The Swift Package Index logo.Swift Package Index

Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build FSPagerView, reference 0.8.3 (13669b), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 20:08:42 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/WenchaoD/FSPagerView.git
Reference: 0.8.3
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/WenchaoD/FSPagerView
 * tag               0.8.3      -> FETCH_HEAD
HEAD is now at 13669bf Update swift-tools-version
Cloned https://github.com/WenchaoD/FSPagerView.git
Revision (git rev-parse @):
13669bf75af92b9528d62ac083c7d2d23814a703
SUCCESS checkout https://github.com/WenchaoD/FSPagerView.git at 0.8.3
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/WenchaoD/FSPagerView.git
https://github.com/WenchaoD/FSPagerView.git
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: fatalError
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: 'spi-builder-workspace': the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
error: the manifest is backward-incompatible with Swift < 6.0 because the tools-version was specified in a subsequent line of the manifest, not the first line. Either move the tools-version specification or increase the required tools-version of your manifest
BUILD FAILURE 6.1 macosSpm