Assertion failed: IDEFileSystemSynchronizedGroupsAreEnabled()

[mattrighetti]

I'm getting the following stack trace error when trying to run a test on a device

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2025-02-16 19:18:20.127 xcodebuild[3333:20921] [MT] DVTAssertions: ASSERTION FAILURE in DevToolsCore/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/ProjectModel/DataModel/References/SynchronizedGroups/PBXFileSystemSynchronizedAbstractGroup.m:28
Details:  Assertion failed: IDEFileSystemSynchronizedGroupsAreEnabled()
Object:   <PBXFileSystemSynchronizedRootGroup>
Method:   +allocWithZone:
Thread:   <_NSMainThread: 0x6000036c0200>{number = 1, name = main}
Hints: 
Backtrace:
  0   -[DVTAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in DVTFoundation)
  1   _DVTAssertionHandler (in DVTFoundation)
  2   _DVTAssertionFailureHandler (in DVTFoundation)
  3   _DVTAssertionWarningHandler (in DVTFoundation)
  4   -[PBXFileSystemSynchronizedAbstractGroup initWithName:path:sourceTree:] (in DevToolsCore)
  5   -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
  6   -[PBXPListUnarchiver _decodeMutableObjectArrayFromPListArray:] (in DevToolsCore)
  7   -[PBXPListUnarchiver decodeMutableObjectArrayForKey:] (in DevToolsCore)
  8   -[PBXUnarchivingBinding readValueForObject:fromPListUnarchiver:] (in DevToolsCore)
  9   -[PBXObject _unarchiveValuesForArchiveMask:fromPListUnarchiver:] (in DevToolsCore)
 10   -[PBXObject readFromPListUnarchiver:] (in DevToolsCore)
 11   -[PBXReference readFromPListUnarchiver:] (in DevToolsCore)
 12   -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
 13   -[PBXPListUnarchiver decodeObjectForKey:] (in DevToolsCore)
 14   -[PBXUnarchivingBinding readValueForObject:fromPListUnarchiver:] (in DevToolsCore)
 15   -[PBXObject _unarchiveValuesForArchiveMask:fromPListUnarchiver:] (in DevToolsCore)
 16   -[PBXObject readFromPListUnarchiver:] (in DevToolsCore)
 17   -[PBXContainer readFromPListUnarchiver:] (in DevToolsCore)
 18   -[PBXProject readFromPListUnarchiver:] (in DevToolsCore)
 19   -[PBXPListUnarchiver _unarchiveObjectWithGlobalIDHexString:] (in DevToolsCore)
 20   -[PBXPListUnarchiver decodeRootObject] (in DevToolsCore)
 21   +[PBXProject projectWithFile:errorHandler:readOnly:] (in DevToolsCore)
 22   -[Xcode3Project initWithFilePath:extension:workspace:options:error:] (in DevToolsCore)
 23   __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke_2 (in IDEFoundation)
 24   _dispatch_client_callout (in libdispatch.dylib)
 25   _dispatch_lane_barrier_sync_invoke_and_complete (in libdispatch.dylib)
 26   DVTDispatchBarrierSync (in DVTFoundation)
 27   -[DVTDispatchLock performLockedBlock:] (in DVTFoundation)
 28   __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke (in IDEFoundation)
 29   __58-[DVTModelObjectGraph performBlockCoalescingModelChanges:]_block_invoke (in DVTFoundation)
 30   -[DVTModelGraphTransactionScope performTransaction:] (in DVTFoundation)
 31   -[DVTModelObjectGraph performBlockCoalescingModelChanges:] (in DVTFoundation)
 32   +[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:] (in IDEFoundation)
 33   -[IDEWorkspace _configureWrappedWorkspaceWithError:] (in IDEFoundation)
 34   __82+[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:]_block_invoke (in IDEFoundation)
 35   +[IDEContainer _retainedContainerAtFilePath:fileDataType:workspace:options:error:] (in IDEFoundation)
 36   +[IDEContainer retainedWrappedWorkspaceForContainerAtFilePath:fileDataType:error:] (in IDEFoundation)
 37   -[Xcode3CommandLineBuildTool _resolveInputOptionsWithTimingSection:] (in Xcode3Core)
 38   -[Xcode3CommandLineBuildTool run] (in Xcode3Core)
 39   XcodeBuildMain (in libxcodebuildLoader.dylib)
 40   -[XcodebuildPreIDEHandler loadXcode3ProjectSupportAndRunXcode3CommandLineBuildToolWithArguments:] (in xcodebuild)
 41   -[XcodebuildPreIDEHandler runWithArguments:] (in xcodebuild)
 42   main (in xcodebuild)
 43   start (in dyld)

[ffried]

@mattrighetti Can you run the following command locally without issues?
xcodebuild -project HNWidgets.xcodeproj -scheme HNWidgets -destination platform=iOS\ Simulator,name=iPhone\ 16 -sdk iphonesimulator test?

In general, this sounds more like an Xcode issue, than an issue with this action. The command above is exactly what this action runs. So I assume it's an issue with the runner (e.g. I saw you just use the default Xcode that is set up, which might not match your project) or the project.

[mattrighetti]

Yeah the command runs fine on my Mac, what I did indeed was replicate what I use locally in this action but the runner complains 🫠

[ffried]

Are you using the same Xcode version?
The macos-latest (which currently resolves to macOS 14 ARM64) is currently using Xcode 15.4 by default.

[ffried]

I've also found the following results related to the error:

• https://stackoverflow.com/questions/78984326/cocoapods-pod-init-fails-with-unknown-isa-pbxfilesystemsynchronizedrootgroup-e
• PBXFileSystemSynchronizedRootGroup causing pod init to fail with CocoaPods 1.15.2a CocoaPods/CocoaPods#12627
• PBXGroup attempted to initialize an object with unknown ISA PBXFileSystemSynchronizedRootGroup fastlane/fastlane#25607

So it sounds like an issue with the Xcode project file.

[austincondiff]

I am experiencing the same problem with the same output. I am working to convert all of our groups to folders but our test runner doesn't like that.

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Things I've tried which DID NOT work...

I've set the project format to Xcode 16.0.
I've also tried checking the "Minimize Project References" checkbox

I've tried setting IDEFileSystemSynchronizedGroupsAreEnabled like so...

echo "Building with arch: ${ARCH}"
echo "SwiftLint Version: $(swiftlint --version)"

export LC_CTYPE=en_US.UTF-8
+ export IDEFileSystemSynchronizedGroupsAreEnabled=YES

set -o pipefail && arch -"${ARCH}" xcodebuild \
           -scheme CodeEdit \
           -destination "platform=OS X,arch=${ARCH}" \
           -skipPackagePluginValidation \
           clean test | xcpretty

I've also tried converting top-level items back to groups.

I'd be very interested to find the reason why this isn't working. I will continue to investigate in the mean-time and I'll post any findings here.