public final class Action<Input, Error: Swift.Error> {

extension Action {

public enum ActionError<Error: Swift.Error>: Swift.Error {
  case disabled

/tmp/test.swift:6:16: error: expected '}' at end of enum
  case disabled
               ^
/tmp/test.swift:5:58: note: to match this opening '{'
public enum ActionError<Error: Swift.Error>: Swift.Error {
                                                         ^
/tmp/test.swift:6:16: error: expected '}' at end of extension
  case disabled
               ^
/tmp/test.swift:3:18: note: to match this opening '{'
extension Action {
                 ^
/tmp/test.swift:3:1: error: declaration is only valid at file scope
extension Action {
^
/tmp/test.swift:6:16: error: expected '}' in class
  case disabled
               ^
/tmp/test.swift:1:54: note: to match this opening '{'
public final class Action<Input, Error: Swift.Error> {
                                                     ^
/tmp/test.swift:3:1: error: constrained extension must be declared on the unspecialized generic type 'Action' with constraints specified by a 'where' clause
extension Action {
^         ~~~~~~
Stack dump:
0.  Program arguments: /Users/nathanhawes/workspace/open-swift-source-compat-suite-master/build/compat_macos/swift-macosx-x86_64/bin/swift -frontend -c -primary-file /tmp/test.swift -target x86_64-apple-darwin18.0.0 -enable-objc-interop -color-diagnostics -module-name test -o /var/folders/jn/jqt21vpn01d0m1k3ygry46hh0000gn/T/test-39ecac.o 
0  swift                    0x00000001125c0a18 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1  swift                    0x00000001125bfbb8 llvm::sys::RunSignalHandlers() + 248
2  swift                    0x00000001125c1032 SignalHandler(int) + 258
3  libsystem_platform.dylib 0x00007fff744e6b3d _sigtramp + 29
4  libsystem_platform.dylib 0x0000000000000088 _sigtramp + 2343671144
5  swift                    0x00000001100ab13a swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 1082
6  swift                    0x00000001100aae9b swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 411
7  swift                    0x00000001100ab449 swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 1865
8  swift                    0x00000001100a12f8 swift::Type::transform(llvm::function_ref<swift::Type (swift::Type)>) const + 40
9  swift                    0x000000010fd11eea swift::constraints::ConstraintSystem::openFunctionType(swift::AnyFunctionType*, unsigned int, swift::constraints::ConstraintLocatorBuilder, llvm::DenseMap<swift::GenericTypeParamType*, swift::TypeVariableType*, llvm::DenseMapInfo<swift::GenericTypeParamType*>, llvm::detail::DenseMapPair<swift::GenericTypeParamType*, swift::TypeVariableType*> >&, swift::DeclContext*, swift::DeclContext*, bool) + 362
10 swift                    0x000000010fd139a5 swift::constraints::ConstraintSystem::getTypeOfMemberReference(swift::Type, swift::ValueDecl*, swift::DeclContext*, bool, swift::FunctionRefKind, swift::constraints::ConstraintLocatorBuilder, swift::DeclRefExpr const*, llvm::DenseMap<swift::GenericTypeParamType*, swift::TypeVariableType*, llvm::DenseMapInfo<swift::GenericTypeParamType*>, llvm::detail::DenseMapPair<swift::GenericTypeParamType*, swift::TypeVariableType*> >*) + 1701
11 swift                    0x000000010fdba0a3 std::__1::tuple<llvm::Optional<swift::RequirementMatch>, swift::Type, swift::Type> llvm::function_ref<std::__1::tuple<llvm::Optional<swift::RequirementMatch>, swift::Type, swift::Type> ()>::callback_fn<swift::matchWitness(swift::TypeChecker&, llvm::DenseMap<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*>, swift::RequirementEnvironment, llvm::DenseMapInfo<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*> >, llvm::detail::DenseMapPair<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*>, swift::RequirementEnvironment> >&, swift::ProtocolDecl*, swift::ProtocolConformance*, swift::DeclContext*, swift::ValueDecl*, swift::ValueDecl*)::$_0>(long) + 1171
12 swift                    0x000000010fda7552 swift::matchWitness(swift::TypeChecker&, swift::DeclContext*, swift::ValueDecl*, swift::ValueDecl*, llvm::function_ref<std::__1::tuple<llvm::Optional<swift::RequirementMatch>, swift::Type, swift::Type> ()>, llvm::function_ref<llvm::Optional<swift::RequirementMatch> (swift::Type, swift::Type)>, llvm::function_ref<swift::RequirementMatch (bool, llvm::ArrayRef<swift::OptionalAdjustment>)>) + 2306
13 swift                    0x000000010fda8cf9 swift::matchWitness(swift::TypeChecker&, llvm::DenseMap<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*>, swift::RequirementEnvironment, llvm::DenseMapInfo<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*> >, llvm::detail::DenseMapPair<std::__1::pair<swift::GenericSignature const*, swift::ClassDecl const*>, swift::RequirementEnvironment> >&, swift::ProtocolDecl*, swift::ProtocolConformance*, swift::DeclContext*, swift::ValueDecl*, swift::ValueDecl*) + 1017
14 swift                    0x000000010fdb09a4 swift::ConformanceChecker::resolveWitnessViaDerivation(swift::ValueDecl*) + 180
15 swift                    0x000000010fdad31e swift::ConformanceChecker::checkConformance(swift::MissingWitnessDiagnosisKind) + 686
16 swift                    0x000000010fdabf89 swift::MultiConformanceChecker::checkIndividualConformance(swift::NormalProtocolConformance*, bool) + 6089
17 swift                    0x000000010fdaa66f swift::MultiConformanceChecker::checkAllConformances() + 111
18 swift                    0x000000010fdb3cd0 swift::TypeChecker::checkConformancesInContext(swift::DeclContext*, swift::IterableDeclContext*) + 2912
19 swift                    0x000000010fdf2c62 typeCheckFunctionsAndExternalDecls(swift::SourceFile&, swift::TypeChecker&) + 178
20 swift                    0x000000010fdf3b98 swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) + 1944
21 swift                    0x000000010fb19a94 swift::CompilerInstance::parseAndTypeCheckMainFileUpTo(swift::SourceFile::ASTStage_t, swift::PersistentParserState&, swift::DelayedParsingCallbacks*, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>) + 420
22 swift                    0x000000010fb18963 swift::CompilerInstance::parseAndCheckTypesUpTo(swift::CompilerInstance::ImplicitImports const&, swift::SourceFile::ASTStage_t) + 435
23 swift                    0x000000010fb182df swift::CompilerInstance::performSemaUpTo(swift::SourceFile::ASTStage_t) + 511
24 swift                    0x000000010f00c9e5 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 1445
25 swift                    0x000000010f00b524 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3028
26 swift                    0x000000010efc4a34 main + 660
27 libdyld.dylib            0x00007fff742fd085 start + 1
28 libdyld.dylib            0x000000000000000d start + 2345676681
<unknown>:0: error: unable to execute command: Segmentation fault: 11
<unknown>:0: error: compile command failed due to signal 11 (use -v to see invocation)