Revert "[SILGen] Fix the type of closure thunks that are passed const reference structs"

[slavapestov]

Unfortunately this breaks swift-nio in the source compat suite:

https://ci.swift.org/job/swift-main-source-compat-suite-debug/910/artifact/swift-source-compat-suite/FAIL_swift-nio_5.0_BuildSwiftPackage.log

error: compile command failed due to signal 6 (use -v to see invocation)
Assertion failed: ((!asForeign || thunkType) && "thunk type needed for foreign type for closures"), function SILDeclRef, file SILDeclRef.cpp, line 177.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.	Program arguments: /Users/ec2-user/jenkins/workspace-private/swift-main-source-compat-suite-debug/build/compat_macos/install/toolchain/usr/bin/swift-frontend -frontend -c /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AddressedEnvelopeTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AddressedEnvelopeTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequenceTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequenceTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequences/NIOAsyncSequenceProducer+HighLowWatermarkBackPressureStrategyTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequences/NIOAsyncSequenceTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequences/NIOAsyncWriterTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/AsyncSequences/NIOThrowingAsyncSequenceTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/BaseObjectsTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/BaseObjectsTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferLengthPrefixTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferLengthPrefixTests.swift -primary-file /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferTest+XCTest.swift -primary-file /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferTest.swift -primary-file /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ChannelOptionStorageTest+XCTest.swift -primary-file /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ChannelOptionStorageTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/CircularBufferTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/CircularBufferTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/CustomChannelTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/CustomChannelTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/DispatchQueue+WithFutureTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/DispatchQueue+WithFutureTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/IOErrorTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/IOErrorTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/IntegerTypesTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/IntegerTypesTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/LinuxTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/LinuxTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/MarkedCircularBufferTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/MarkedCircularBufferTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/NIOAnyDebugTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/NIOAnyDebugTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/NIOCloseOnErrorHandlerTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/NIOCloseOnErrorHandlerTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/RecvByteBufAllocatorTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/RecvByteBufAllocatorTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/SingleStepByteToMessageDecoderTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/SingleStepByteToMessageDecoderTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TimeAmount+DurationTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TimeAmount+DurationTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TimeAmountTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TimeAmountTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TypeAssistedChannelHandlerTests+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/TypeAssistedChannelHandlerTests.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/UtilitiesTest+XCTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/UtilitiesTest.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/XCTest+AsyncAwait.swift /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/XCTest+Extensions.swift -supplementary-output-file-map /var/folders/bb/hcrjxg1s0b96pfst0ymhmp240000gn/T/TemporaryDirectory.Jtf6jZ/supplementaryOutputs-4 -target x86_64-apple-macosx13.0 -enable-objc-interop -sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -I /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/Modules -I /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -enable-testing -g -debug-info-format=dwarf -dwarf-version=4 -module-cache-path /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/ModuleCache -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -empty-abi-descriptor -disable-sandbox -Xcc -working-directory -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio -resource-dir /Users/ec2-user/jenkins/workspace-private/swift-main-source-compat-suite-debug/build/compat_macos/install/toolchain/usr/lib/swift -enable-anonymous-context-mangled-names -file-compilation-dir /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio -Xcc -fmodule-map-file=/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/checkouts/swift-atomics/Sources/_AtomicsShims/include/module.modulemap -Xcc -I -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/checkouts/swift-atomics/Sources/_AtomicsShims/include -Xcc -fmodule-map-file=/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/CNIOLinux.build/module.modulemap -Xcc -I -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Sources/CNIOLinux/include -Xcc -fmodule-map-file=/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/CNIODarwin.build/module.modulemap -Xcc -I -Xcc /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Sources/CNIODarwin/include -Xcc -isysroot -Xcc /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -Xcc -F -Xcc /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -Xcc -fPIC -Xcc -g -module-name NIOCoreTests -in-process-plugin-server-path /Users/ec2-user/jenkins/workspace-private/swift-main-source-compat-suite-debug/build/compat_macos/install/toolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Users/ec2-user/jenkins/workspace-private/swift-main-source-compat-suite-debug/build/compat_macos/install/toolchain/usr/lib/swift/host/plugins -plugin-path /Users/ec2-user/jenkins/workspace-private/swift-main-source-compat-suite-debug/build/compat_macos/install/toolchain/usr/local/lib/swift/host/plugins -target-sdk-version 14.2 -target-sdk-name macosx14.2 -external-plugin-path /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins#/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins#/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -parse-as-library -o /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/NIOCoreTests.build/ByteBufferTest+XCTest.swift.o -o /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/NIOCoreTests.build/ByteBufferTest.swift.o -o /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/NIOCoreTests.build/ChannelOptionStorageTest+XCTest.swift.o -o /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/NIOCoreTests.build/ChannelOptionStorageTest.swift.o -index-store-path /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/.build/x86_64-apple-macosx/debug/index/store -index-system-modules
1.	Apple Swift version 6.1-dev (LLVM 36eb110968adc58, Swift 606641834035f11)
2.	Compiling with effective version 5.10
3.	While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferTest.swift")
4.	While silgen emitFunction SIL function "@$s12NIOCoreTests14ByteBufferTestC025testAllocationOfReallyBigcD0yyKF".
 for 'testAllocationOfReallyBigByteBuffer()' (at /Users/ec2-user/jenkins/workspace/swift-main-source-compat-suite-debug/swift-source-compat-suite/project_cache/swift-nio/Tests/NIOCoreTests/ByteBufferTest.swift:1327:5)
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           0x00000001099a5ea8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 40
1  swift-frontend           0x00000001099a4048 llvm::sys::RunSignalHandlers() + 248
2  swift-frontend           0x00000001099a650e SignalHandler(int) + 270
3  libsystem_platform.dylib 0x00007ff80e3525ed _sigtramp + 29
4  swift-frontend           0x0000000103323600 $s3SIL8FunctionC8registeryyFZySo07BridgedB0V_SvSitcfU_ + 128
5  libsystem_c.dylib        0x00007ff80e24bb45 abort + 123
6  libsystem_c.dylib        0x00007ff80e24ae5e err + 0
7  swift-frontend           0x0000000109e58473 swift::SILDeclRef::SILDeclRef(llvm::PointerUnion<swift::ValueDecl*, swift::AbstractClosureExpr*, swift::FileUnit*>, bool, bool, bool, clang::Type const*) (.cold.1) + 35
8  swift-frontend           0x000000010451c092 swift::SILDeclRef::SILDeclRef(llvm::PointerUnion<swift::ValueDecl*, swift::AbstractClosureExpr*, swift::FileUnit*>, bool, bool, bool, clang::Type const*) + 434
9  swift-frontend           0x0000000103c6d676 (anonymous namespace)::RValueEmitter::visitFunctionConversionExpr(swift::FunctionConversionExpr*, swift::Lowering::SGFContext) + 3014
10 swift-frontend           0x0000000103c62d14 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 740
11 swift-frontend           0x0000000103c5847c swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) + 60
12 swift-frontend           0x0000000103bfc66c (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, std::__1::optional<swift::AnyFunctionType::Param>) + 4236
13 swift-frontend           0x0000000103be9488 (anonymous namespace)::ArgEmitter::emitSingleArg(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern, std::__1::optional<swift::AnyFunctionType::Param>) + 296
14 swift-frontend           0x0000000103bfa905 (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 261
15 swift-frontend           0x0000000103c088cc (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, swift::ForeignInfo const&) && + 1068
16 swift-frontend           0x0000000103c08017 (anonymous namespace)::CallEmission::emitArgumentsForNormalApply(swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, swift::ForeignInfo const&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, std::__1::optional<swift::SILLocation>&) + 1191
17 swift-frontend           0x0000000103bee3a2 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 2178
18 swift-frontend           0x0000000103beb4d3 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 51
19 swift-frontend           0x0000000103c62a79 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 73
20 swift-frontend           0x0000000103c5521c swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::__1::optional<swift::SILLocation>) + 172
21 swift-frontend           0x0000000103c3fe34 swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int, bool) + 1700
22 swift-frontend           0x0000000103c47a53 swift::ASTVisitor<swift::Lowering::SILGenFunction, void, void, void, void, void, void>::visit(swift::Decl*) + 147
23 swift-frontend           0x0000000103d06bbc swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 5932
24 swift-frontend           0x0000000103d05485 swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) + 21
25 swift-frontend           0x0000000103c82b97 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 487
26 swift-frontend           0x0000000103bd6cdc swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 6716
27 swift-frontend           0x0000000103bd7c77 swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) + 263
28 swift-frontend           0x0000000103bd5278 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 184
29 swift-frontend           0x0000000103d1f295 (anonymous namespace)::SILGenType::visitFuncDecl(swift::FuncDecl*) + 21
30 swift-frontend           0x0000000103d1b752 (anonymous namespace)::SILGenType::emitType() + 290
31 swift-frontend           0x0000000103d1b629 swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) + 25
32 swift-frontend           0x0000000103bda6e3 swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) + 179
33 swift-frontend           0x0000000103bdacf4 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const + 804
34 swift-frontend           0x0000000103d04e73 swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) + 115
35 swift-frontend           0x0000000103be049d swift::ASTLoweringRequest::OutputType swift::Evaluator::getResultUncached<swift::ASTLoweringRequest, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()>(swift::ASTLoweringRequest const&, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()) + 333
36 swift-frontend           0x0000000103bdb454 swift::performASTLowering(swift::FileUnit&, swift::Lowering::TypeConverter&, swift::SILOptions const&, swift::IRGenOptions const*) + 100
37 swift-frontend           0x00000001034dd4a5 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 693
38 swift-frontend           0x00000001034ec34f withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) + 143
39 swift-frontend           0x00000001034df920 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 944
40 swift-frontend           0x00000001034dedfb swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 2699
41 swift-frontend           0x0000000103295799 swift::mainEntry(int, char const**) + 2569
42 dyld                     0x00007ff80dfcb41f start + 1903

Reverts #75491

[slavapestov]

@ahatanaka Do you mind taking a look?

[slavapestov]

@swift-ci Please test source compatibility

[slavapestov]

@swift-ci Please smoke test