func defaultValue<T>() -> T {
    fatalError()
}

struct S<T> {
    let value1: T = defaultValue()
    let value2: Int
}

func main() {
    _ = S<Int>(value2: 1)
}

Assertion failed: (fieldTy->isEqual(field->getParentInitializer()->getType()) && "Checked by sema"), function emitImplicitValueConstructor, file /Users/kateinoigakukun/projects/swift-source/swift/lib/SILGen/SILGenConstructor.cpp, line 144.
Stack dump:
0.  Program arguments: /Users/yuutas4/projects/swift-source/build/Xcode-DebugAssert/swift-macosx-x86_64/Debug/bin/swift -frontend -c -primary-file Sources/sil_crash/sil_crash.swift -target x86_64-apple-darwin18.2.0 -enable-objc-interop -color-diagnostics -module-name sil_crash -o /var/folders/36/f44c1x4d081f4l5zmx_68x5w0000gn/T/sil_crash-a611e0.o
1.  While silgen emitConstructor SIL function "@$s9sil_crash1SV6value2ACyxGSi_tcfC".
 for 'init(value2:)' (at Sources/sil_crash/sil_crash.swift:5:8)
0  swift                    0x000000011706205c llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 60
1  swift                    0x00000001170625b9 PrintStackTraceSignalHandler(void*) + 25
2  swift                    0x000000011705fb86 llvm::sys::RunSignalHandlers() + 118
3  swift                    0x000000011706355e SignalHandler(int) + 190
4  libsystem_platform.dylib 0x00007fff67a4bb3d _sigtramp + 29
5  swift                    0x000000011114072d llvm::DenseMapInfo<swift::Type>::getHashValue(swift::Type) + 29
6  libsystem_c.dylib        0x00007fff679091c9 abort + 127
7  libsystem_c.dylib        0x00007fff678d1868 basename_r + 0
8  swift                    0x000000010f94845a emitImplicitValueConstructor(swift::Lowering::SILGenFunction&, swift::ConstructorDecl*) + 2762
9  swift                    0x000000010f94622b swift::Lowering::SILGenFunction::emitValueConstructor(swift::ConstructorDecl*) + 155
10 swift                    0x000000010f8d44fb swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*)::$_4::operator()(swift::SILFunction*) const + 539
11 swift                    0x000000010f8b56ff void emitOrDelayFunction<swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*)::$_4>(swift::Lowering::SILGenModule&, swift::SILDeclRef, swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*)::$_4&&, bool) + 831
12 swift                    0x000000010f8b4cd3 swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*) + 947
13 swift                    0x000000010fa9c5f7 (anonymous namespace)::SILGenType::visitConstructorDecl(swift::ConstructorDecl*) + 39
14 swift                    0x000000010fa9b96c swift::ASTVisitor<(anonymous namespace)::SILGenType, void, void, void, void, void, void>::visit(swift::Decl*) + 876
15 swift                    0x000000010fa93f3e (anonymous namespace)::SILGenType::emitType() + 158
16 swift                    0x000000010fa93e6a swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) + 42
17 swift                    0x000000010f8df228 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visitStructDecl(swift::StructDecl*) + 40
18 swift                    0x000000010f8bc401 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 225
19 swift                    0x000000010f8bbf4e swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) + 622
20 swift                    0x000000010f8bcdea swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*) + 538
21 swift                    0x000000010f8bd7bb swift::performSILGeneration(swift::FileUnit&, swift::SILOptions&) + 59
22 swift                    0x000000010e40bae7 generateSILModules(swift::CompilerInvocation&, swift::CompilerInstance&) + 887
23 swift                    0x000000010e4024b2 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 1554
24 swift                    0x000000010e4010b5 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 2421
25 swift                    0x000000010e3396b2 run_driver(llvm::StringRef, llvm::ArrayRef<char const*>) + 914
26 swift                    0x000000010e3380f3 main + 2723
27 libdyld.dylib            0x00007fff67860ed9 start + 1
28 libdyld.dylib            0x000000000000000d start + 2558128437
<unknown>:0: error: unable to execute command: Abort trap: 6
<unknown>:0: error: compile command failed due to signal 6 (use -v to see invocation)