Another example can be found here
*** DESERIALIZATION FAILURE (please include this section in any bug report) ***
serialized conformances do not match requirement signature
0 swift 0x00000001058b578a PrintStackTraceSignalHandler(void*) + 42
1 swift 0x00000001058b4b46 SignalHandler(int) + 966
2 libsystem_platform.dylib 0x00007fff70ebdf5a _sigtramp + 26
3 libsystem_platform.dylib 0x000000011609e558 _sigtramp + 2770208280
4 libsystem_c.dylib 0x00007fff70ce8312 abort + 127
5 swift 0x0000000102fe99de swift::ModuleFile::fatal(llvm::Error) + 2062
6 swift 0x0000000103005fcb swift::ModuleFile::finishNormalConformance(swift::NormalProtocolConformance*, unsigned long long) + 7403
7 swift 0x0000000103311692 swift::NormalProtocolConformance::getTypeWitnessAndDecl(swift::AssociatedTypeDecl*, swift::LazyResolver*, swift::SubstOptions) const + 66
8 swift 0x0000000103310f68 swift::ProtocolConformance::getTypeWitnessAndDecl(swift::AssociatedTypeDecl*, swift::LazyResolver*, swift::SubstOptions) const + 472
9 swift 0x0000000103311103 swift::ProtocolConformance::getTypeWitnessAndDecl(swift::AssociatedTypeDecl*, swift::LazyResolver*, swift::SubstOptions) const + 883
10 swift 0x0000000103326357 getMemberForBaseType(llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>, swift::Type, swift::Type, swift::AssociatedTypeDecl*, swift::Identifier, swift::SubstOptions) + 1207
11 swift 0x0000000103325bc8 llvm::Optional<swift::Type> llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>::callback_fn<substType(swift::Type, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>, swift::SubstOptions)::$_18>(long, swift::TypeBase*) + 1400
12 swift 0x000000010331ed59 swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 137
13 swift 0x0000000103324d83 substType(swift::Type, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>, swift::SubstOptions) + 211
14 swift 0x0000000103325a84 llvm::Optional<swift::Type> llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>::callback_fn<substType(swift::Type, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>, swift::SubstOptions)::$_18>(long, swift::TypeBase*) + 1076
15 swift 0x000000010331ed59 swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 137
16 swift 0x0000000103324d83 substType(swift::Type, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>, swift::SubstOptions) + 211
17 swift 0x0000000102d32539 (anonymous namespace)::SILTypeSubstituter::visitType(swift::CanType) + 89
18 swift 0x0000000102d328e2 (anonymous namespace)::SILTypeSubstituter::substSILFunctionType(swift::CanTypeWrapper<swift::SILFunctionType>) + 754
19 swift 0x0000000102d32de3 swift::SILFunctionType::substGenericArgs(swift::SILModule&, llvm::ArrayRef<swift::Substitution>) + 275
20 swift 0x0000000102d49cc3 swift::TryApplyInst::create(swift::SILDebugLocation, swift::SILValue, llvm::ArrayRef<swift::Substitution>, llvm::ArrayRef<swift::SILValue>, swift::SILBasicBlock*, swift::SILBasicBlock*, swift::SILFunction&, swift::SILOpenedArchetypesState&, swift::GenericSpecializationInformation const*) + 67
21 swift 0x000000010301a325 swift::SILDeserializer::readSILInstruction(swift::SILFunction*, swift::SILBasicBlock*, swift::SILBuilder&, unsigned int, llvm::SmallVectorImpl<unsigned long long>&) + 56517
22 swift 0x000000010300be30 swift::SILDeserializer::readSILFunction(llvm::PointerEmbeddedInt<unsigned int, 31>, swift::SILFunction*, llvm::StringRef, bool, bool) + 5712
23 swift 0x000000010301edad swift::SILDeserializer::getAllSILFunctions() + 893
24 swift 0x00000001030b70a4 swift::SerializedSILLoader::getAllForModule(swift::Identifier, swift::FileUnit*) + 196
25 swift 0x0000000101f1aa0b performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 30459
26 swift 0x0000000101f11894 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 7908
27 swift 0x0000000101ec62c5 main + 18917
28 libdyld.dylib 0x00007fff70c3c115 start + 1
29 libdyld.dylib 0x0000000000000062 start + 2403090254
Stack dump:
0. Program arguments: /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -merge-modules -emit-module /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FluentCache~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FluentCacheEntry~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FluentCacheMigration~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/DatabaseConnection~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Exports~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FluentError~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Migration~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/MigrationConfig~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/MigrationContainer~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/MigrationLog~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryMigrationConfig~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaMigrationConfig~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Identifier~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Model~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SoftDeletable~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Timestampable~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Pivot~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryBuilder+CRUD~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryBuilder+Execute~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryBuilder~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/DatabaseQuery~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Comparison~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Filter~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FilterMethod~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/GroupRelation~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SubsetScope~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryAction~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryAggregate~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryField~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryJoin~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryRange~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QueryResultStream~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QuerySort~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/QuerySupporting~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Children~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Parent~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Siblings~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/DatabaseSchema~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaAction~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaBuilder~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaCreator~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaField~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaReference~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaSupporting~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/SchemaUpdater~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/FluentProvider~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/DatabaseTransaction~partial.swiftmodule /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/TransactionSupporting~partial.swiftmodule -parse-as-library -sil-merge-partial-modules -disable-diagnostic-passes -disable-sil-perf-optzns -target x86_64-apple-macosx10.10 -enable-objc-interop -sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -I /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Products/Debug -F /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Products/Debug -F /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -enable-testing -g -module-cache-path /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/ModuleCache -swift-version 4 -enforce-exclusivity=checked -Onone -D SWIFT_PACKAGE -D Xcode -serialize-debugging-options -Xcc -I/Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/swift-overrides.hmap -Xcc -I/Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Products/Debug/include -Xcc -I/Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/DerivedSources/x86_64 -Xcc -I/Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/DerivedSources -Xcc -working-directory/Users/joannisorlandos/Documents/Vapor/fluent -emit-module-doc-path /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Fluent.swiftdoc -module-name Fluent -emit-objc-header-path /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Fluent-Swift.h -o /Users/joannisorlandos/Library/Developer/Xcode/DerivedData/Fluent-bfxtpijryoomwsgclfvoaxqqtfql/Build/Intermediates.noindex/Fluent.build/Debug/Fluent.build/Objects-normal/x86_64/Fluent.swiftmodule
1. While reading from 'Fluent'
2. While finishing conformance for type 'FluentCacheEntry<D>'
3. While ... to 'Model' in module 'Fluent'```