protocol Initializable {
  init()
}
struct Generic<T: Initializable> {
  init(_ value: T = T()) {}
}
struct InitializableImpl: Initializable {
  init() {}
}
func testInitializable() {
  // The ".init" is required to avoid SR-3806.
  _ = Generic<InitializableImpl>.init()

Assertion failed: (!ParamInfos.empty()), function claimNextParameter, file /Volumes/Data/swift-public/swift/lib/SILGen/SILGenApply.cpp, line 2961.
0  swiftc                   0x00000001088847a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1  swiftc                   0x00000001088839c6 llvm::sys::RunSignalHandlers() + 86
2  swiftc                   0x0000000108884df9 SignalHandler(int) + 361
3  libsystem_platform.dylib 0x000000010b4f4fba _sigtramp + 26
4  libsystem_platform.dylib 0x0000ffff00001fa0 _sigtramp + 4105228288
5  libsystem_c.dylib        0x000000010b27bf8b abort + 127
6  libsystem_c.dylib        0x000000010b2446e6 basename_r + 0
7  swiftc                   0x0000000105eb1bfa (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 5370
8  swiftc                   0x0000000105eb3ad2 (anonymous namespace)::ArgEmitter::emitShuffle(swift::Expr*, swift::Expr*, llvm::ArrayRef<swift::TupleTypeElt>, swift::ConcreteDeclRef, llvm::ArrayRef<swift::Expr*>, llvm::ArrayRef<int>, llvm::ArrayRef<unsigned int>, swift::Type, swift::Lowering::AbstractionPattern) + 4354
9  swiftc                   0x0000000105eb2865 (anonymous namespace)::ArgEmitter::emitExpanded(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 2197
10 swiftc                   0x0000000105eb082f (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 303
11 swiftc                   0x0000000105eafe84 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<std::__1::pair<swift::Lowering::LValue, swift::SILLocation> >&, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus const&) && + 452
12 swiftc                   0x0000000105e9c747 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 5863
13 swiftc                   0x0000000105e9ab43 swift::Lowering::SILGenFunction::emitApplyExpr(swift::Expr*, swift::Lowering::SGFContext) + 51