Cross module compilation results in DESERIALIZATION FAILURE

Description

Compiling the attached minimal project crashes the compiler with a DESERIALIZATION FAILURE
"While finishing conformance for protocol conformance to 'PersistentModel' (in module 'SwiftData')"

The app project references the initializer of a model object in a framework module at the point of failure.

If the model object is moved into the app project the compilation succeeds.

App Module

struct PreviewData {
    static func load() {
        let collection = GameCollection()
    }
}

Framework Module

@Model
public final class GameCollection {
    public var name: String
    
    public init() {}
}

Steps to reproduce

Build the project in Xcode or from the command line.

Environment

swiftc --version
swift-driver version: 1.87.1 Apple Swift version 5.9 (swiftlang-5.9.0.128.2 clang-1500.0.40.1)
Target: arm64-apple-macosx14.0

xcodebuild -version
Xcode 15.0
Build version 15A5219j

DeserializationError.zip

1. Apple Swift version 5.9 (swiftlang-5.9.0.128.2 clang-1500.0.40.1)
2. Compiling with the current language version
3. While evaluating request TypeCheckSourceFileRequest(source_file "/Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift")
4. While evaluating request TypeCheckFunctionBodyRequest(DeserializationError.(file).PreviewData.load()@/Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift:8:17)
5. While type-checking statement at [/Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift:8:24 - line:10:5] RangeText="{
   let collection = GameCollection()
   "
6. While type-checking declaration 0x146859600 (at /Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift:9:9)
7. While evaluating request PatternBindingEntryRequest((unknown decl), 0, 0)
8. While type-checking expression at [/Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift:9:26 - line:9:41] RangeText="GameCollection("
9. While type-checking-target starting at /Users/sasha/Desktop/DeserializationError/DeserializationError/Preview Content/PreviewData.swift:9:26
10. While reading from module 'DataModel', builder version '5.9(5.9)/Apple Swift version 5.9 (swiftlang-5.9.0.128.2 clang-1500.0.40.1)', built from source, non-resilient, loaded from '/Users/sasha/Library/Developer/Xcode/DerivedData/DeserializationError-fddtiwotpphkqkahwufvkvbgvnxe/Build/Products/Debug/DataModel.framework/Modules/DataModel.swiftmodule/arm64-apple-macos.swiftmodule'
11. While finishing conformance for protocol conformance to 'PersistentModel' (in module 'SwiftData') for type 'GameCollection'
12. *** DESERIALIZATION FAILURE ***
    *** If any module named here was modified in the SDK, please delete the ***
    *** new swiftmodule files from the SDK and keep only swiftinterfaces. ***
    module 'DataModel', builder version '5.9(5.9)/Apple Swift version 5.9 (swiftlang-5.9.0.128.2 clang-1500.0.40.1)', built from source, non-resilient, loaded from '/Users/sasha/Library/Developer/Xcode/DerivedData/DeserializationError-fddtiwotpphkqkahwufvkvbgvnxe/Build/Products/Debug/DataModel.framework/Modules/DataModel.swiftmodule/arm64-apple-macos.swiftmodule'
    serialized conformances do not match requirement signature

Stack dump:

Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var LLVM_SYMBOLIZER_PATH to point to it):
0 swift-frontend 0x00000001037b5d04 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1 swift-frontend 0x000000010175c4d4 llvm::sys::RunSignalHandlers() + 112
2 swift-frontend 0x00000001037b6500 SignalHandler(int) + 352
3 libsystem_platform.dylib 0x000000018f06da24 _sigtramp + 56
4 libsystem_pthread.dylib 0x000000018f03ecc0 pthread_kill + 288
5 libsystem_c.dylib 0x000000018ef4ea50 abort + 180
6 swift-frontend 0x00000001043e8928 swift::TypeBase::getRValueType() + 0
7 swift-frontend 0x000000010288da08 clang::ASTDeclReader::VisitTemplateTemplateParmDecl(clang::TemplateTemplateParmDecl*) + 0
8 swift-frontend 0x000000010427cd1c swift::ModuleFile::fatal(llvm::Error) const + 44
9 swift-frontend 0x00000001028fa238 bool std::__1::__insertion_sort_incomplete<llvm::less_first&, std::__1::pair<clang::FileID, clang::ASTWriter::DeclIDInFileInfo*>>(std::__1::pair<clang::FileID, clang::ASTWriter::DeclIDInFileInfo>, std::__1::pair<clang::FileID, clang::ASTWriter::DeclIDInFileInfo>, llvm::less_first&) + 0
10 swift-frontend 0x00000001042eafac swift::ProtocolConformance::getWitnessDecl(swift::ValueDecl) const + 92
11 swift-frontend 0x0000000105f1cd80 (anonymous namespace)::LookupResultBuilder::add(swift::ValueDecl*, swift::DeclContext*, swift::ValueDecl*, swift::Type, bool) (.llvm.8548534310393107942) + 648
12 swift-frontend 0x0000000105f1d518 swift::TypeChecker::lookupMember(swift::DeclContext*, swift::Type, swift::DeclNameRef, swift::SourceLoc, swift::OptionSet<swift::NameLookupFlags, unsigned int>) + 372
13 swift-frontend 0x00000001054ecce8 swift::constraints::ConstraintSystem::lookupMember(swift::Type, swift::DeclNameRef, swift::SourceLoc) + 452
14 swift-frontend 0x0000000102e2db88 swift::constraints::ConstraintSystem::performMemberLookup(swift::constraints::ConstraintKind, swift::DeclNameRef, swift::Type, swift::FunctionRefKind, swift::constraints::ConstraintLocator*, bool) + 3176
15 swift-frontend 0x00000001050516c0 swift::constraints::ConstraintSystem::simplifyMemberConstraint(swift::constraints::ConstraintKind, swift::Type, swift::DeclNameRef, swift::Type, swift::DeclContext*, swift::FunctionRefKind, llvm::ArrayRefswift::constraints::OverloadChoice, swift::OptionSet<swift::constraints::ConstraintSystem::TypeMatchFlags, unsigned int>, swift::constraints::ConstraintLocatorBuilder) + 3940
16 swift-frontend 0x0000000102e28e04 swift::constraints::ConstraintSystem::simplifyConstructionConstraint(swift::Type, swift::FunctionType*, swift::OptionSet<swift::constraints::ConstraintSystem::TypeMatchFlags, unsigned int>, swift::DeclContext*, swift::FunctionRefKind, swift::constraints::ConstraintLocator*) + 900
17 swift-frontend 0x0000000102e461d8 swift::constraints::ConstraintSystem::simplifyApplicableFnConstraint(swift::Type, swift::Type, llvm::Optionalswift::constraints::TrailingClosureMatching, swift::OptionSet<swift::constraints::ConstraintSystem::TypeMatchFlags, unsigned int>, swift::constraints::ConstraintLocatorBuilder) + 3564
18 swift-frontend 0x0000000105076728 swift::constraints::ConstraintSystem::addConstraintImpl(swift::constraints::ConstraintKind, swift::Type, swift::Type, swift::constraints::ConstraintLocatorBuilder, bool) + 1612
19 swift-frontend 0x0000000105035d18 swift::constraints::ConstraintSystem::addConstraint(swift::constraints::ConstraintKind, swift::Type, swift::Type, swift::constraints::ConstraintLocatorBuilder, bool) + 80
20 swift-frontend 0x0000000102de7c28 (anonymous namespace)::ConstraintGenerator::visitApplyExpr(swift::ApplyExpr*) + 728
21 swift-frontend 0x0000000104f9008c (anonymous namespace)::ConstraintWalker::walkToExprPost(swift::Expr*) (.llvm.2195760730715066887) + 740
22 swift-frontend 0x0000000102dc29b0 swift::constraints::ConstraintSystem::generateConstraints(swift::Expr*, swift::DeclContext*, bool) + 248
23 swift-frontend 0x0000000104f8a968 swift::constraints::ConstraintSystem::generateConstraints(swift::constraints::SyntacticElementTarget&, swift::FreeTypeVariableBinding) + 1264
24 swift-frontend 0x000000010510a48c swift::constraints::ConstraintSystem::solve(swift::constraints::SyntacticElementTarget&, swift::FreeTypeVariableBinding) + 932
25 swift-frontend 0x0000000105b62e7c swift::TypeChecker::typeCheckTarget(swift::constraints::SyntacticElementTarget&, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>) + 680
26 swift-frontend 0x000000010339c00c swift::TypeChecker::typeCheckExpression(swift::constraints::SyntacticElementTarget&, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>) + 436
27 swift-frontend 0x00000001033a353c swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>) + 368
28 swift-frontend 0x0000000105b64164 swift::TypeChecker::typeCheckPatternBinding(swift::PatternBindingDecl*, unsigned int, swift::Type, swift::OptionSet<swift::TypeCheckExprFlags, unsigned int>) + 256
29 swift-frontend 0x00000001061c57bc swift::PatternBindingEntryRequest::evaluate(swift::Evaluator&, swift::PatternBindingDecl*, unsigned int, bool) const + 3760
30 swift-frontend 0x0000000103432a58 llvm::Expectedswift::PatternBindingEntryRequest::OutputType swift::Evaluator::getResultUncachedswift::PatternBindingEntryRequest(swift::PatternBindingEntryRequest const&) + 648
31 swift-frontend 0x0000000105b98288 swift::PatternBindingEntryRequest::OutputType swift::evaluateOrDefaultswift::PatternBindingEntryRequest(swift::Evaluator&, swift::PatternBindingEntryRequest, swift::PatternBindingEntryRequest::OutputType) + 56
32 swift-frontend 0x0000000105dba598 (anonymous namespace)::DeclChecker::visit(swift::Decl*) (.llvm.8758870092475618849) + 6424
33 swift-frontend 0x0000000103479270 swift::TypeChecker::typeCheckDecl(swift::Decl*, bool) + 220
34 swift-frontend 0x000000010363b8a4 swift::ASTVisitor<(anonymous namespace)::StmtChecker, void, swift::Stmt*, void, void, void, void>::visit(swift::Stmt*) (.llvm.6636653444114463613) + 296
35 swift-frontend 0x00000001061716e8 bool (anonymous namespace)::StmtChecker::typeCheckStmtswift::BraceStmt(swift::BraceStmt*&) (.llvm.6636653444114463613) + 316
36 swift-frontend 0x00000001036337e8 swift::TypeCheckFunctionBodyRequest::evaluate(swift::Evaluator&, swift::AbstractFunctionDecl*) const + 2160
37 swift-frontend 0x0000000103d4d968 swift::TypeCheckFunctionBodyRequest::OutputType swift::evaluateOrDefaultswift::TypeCheckFunctionBodyRequest(swift::Evaluator&, swift::TypeCheckFunctionBodyRequest, swift::TypeCheckFunctionBodyRequest::OutputType) + 884
38 swift-frontend 0x00000001036f5900 swift::TypeCheckSourceFileRequest::evaluate(swift::Evaluator&, swift::SourceFile*) const + 608
39 swift-frontend 0x00000001036fa3d0 llvm::Expectedswift::TypeCheckSourceFileRequest::OutputType swift::Evaluator::getResultUncachedswift::TypeCheckSourceFileRequest(swift::TypeCheckSourceFileRequest const&) + 664
40 swift-frontend 0x00000001036f0df0 swift::TypeCheckSourceFileRequest::OutputType swift::evaluateOrDefaultswift::TypeCheckSourceFileRequest(swift::Evaluator&, swift::TypeCheckSourceFileRequest, swift::TypeCheckSourceFileRequest::OutputType) + 228
41 swift-frontend 0x00000001024be920 swift::CompilerInstance::performSema() + 160
42 swift-frontend 0x0000000106462db4 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 464
43 swift-frontend 0x0000000100e39b10 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4568
44 swift-frontend 0x0000000105da3dd4 swift::mainEntry(int, char const**) + 4116
45 dyld 0x000000018ecc5058 start + 2224
Command SwiftCompile failed with a nonzero exit code

[DaveakX]

Do you by any chance have a string based enum in GameCollection ? I've seen the same error with the latest beta and the workaround was to switch back to what was required in the first betas, switching to just storing a string and having a transient property deal with the enum get/set.

The actual GameCollection class has several properties that have all been adjusted to conform to the current beta sharp edges. The code shown above & in the attached minimal project has only a single String property.

The issue seems to be isolated to the serialization of init.

I created a static method to invoke the initializer & things seem to work as expected when calling the method from another module.

In GameCollection.swift:

public static func create() -> GameCollection {
    GameCollection()
}

[patterueldev]

The issue seems to be isolated to the serialization of init.

I created a static method to invoke the initializer & things seem to work as expected when calling the method from another module.

In GameCollection.swift:

public static func create() -> GameCollection {
    GameCollection()
}

I don't know if my comment is relevant, but this worked in my project.
I'm so stressed why I can't suddenly build my app, and I reduced my test files to minimal until I got to a point where I identified that the culprit behind my package not building is because of the instantiation of my model e.g.
Category(name: "Sports")
where @Model class category { ... }

But thanks to you, I somehow was managed to salvage my code, I thought I have to completely give up SwiftData. I guess I'll settle with this until the guys at swift actually fixes this, if this is actually an issue and they are on the roadmap to fix it.

[rkhamilton]

I also ran into this same compiler crash in my project. I had defined my ModelObjects in a package, and attempted to use them in another package. I get the same DESERIALIZATION FAILURE.

Thank you for identifying the workaround to use a public static func wrapper for the initializer. This allowed me to keep moving forward with my project as well.

This crash appeared for me in Xcode 15 beta 6, and is still present in beta 7. I've sent in feedback FB13038974, but also wanted to pile on here.

[cianiandreadev]

Thank you guys. Same issues here (iOS 17 beta 6 & 7).

I have my persistency layer in a Swift Package and same serialization problem when using it in main apps (both Mac, iOS and Watch OS).

Nice to know that at least I'm not alone! 😆

Fixed in:

% swiftc --version
swift-driver version: 1.87.1 Apple Swift version 5.9 (swiftlang-5.9.0.128.108 clang-1500.0.40.1)
Target: arm64-apple-macosx14.0

% xcodebuild -version
Xcode 15.0
Build version 15A240d

[up4154]

Fixed in:

% swiftc --version
swift-driver version: 1.87.1 Apple Swift version 5.9 (swiftlang-5.9.0.128.108 clang-1500.0.40.1)
Target: arm64-apple-macosx14.0

% xcodebuild -version
Xcode 15.0
Build version 15A240d

hey i have the same version but still facing the same issue along with Command SwiftCompile failed with a nonzero exit code