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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 Croc, reference master (4f76b6), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 17:47:45 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/JKalash/Croc.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/JKalash/Croc
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 4f76b63 Swift 4.2 version bump, pod spec cleanup and some file move around
Cloned https://github.com/JKalash/Croc.git
Revision (git rev-parse @):
4f76b6392970e236f6f7c7a72c13354be785da1d
SUCCESS checkout https://github.com/JKalash/Croc.git at master
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
Fetching https://github.com/JKalash/Croc.git
[1/610] Fetching croc
Fetched https://github.com/JKalash/Croc.git from cache (1.02s)
Creating working copy for https://github.com/JKalash/Croc.git
Working copy of https://github.com/JKalash/Croc.git resolved at master (4f76b63)
error: 'croc': invalid custom path 'Sources' for target 'Croc'
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/JKalash/Croc.git
https://github.com/JKalash/Croc.git
error: invalid custom path 'Sources' for target 'Croc'
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': invalid custom path 'Sources' for target 'Croc'
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': invalid custom path 'Sources' for target 'Croc'
BUILD FAILURE 6.1 macosSpm