crash.log

/Users/stevej/src/CutieBaby/CutieBaby/GameScene.swift:12:6: error: unimplemented IR generation feature non-fixed multi-payload enum layout
enum Tree<T>:TreeLike {
     ^
0  swift                    0x0000000101e6f028 llvm::sys::PrintStackTrace(__sFILE*) + 40
1  swift                    0x0000000101e6f514 SignalHandler(int) + 452
2  libsystem_platform.dylib 0x00007fff89c395aa _sigtramp + 26
3  libsystem_platform.dylib 000000000000000000 _sigtramp + 1983670896
4  swift                    0x0000000101ce7290 llvm::ConstantFoldGetElementPtr(llvm::Constant*, bool, llvm::ArrayRef<llvm::Value*>) + 112
5  swift                    0x0000000101cef6f3 llvm::ConstantExpr::getGetElementPtr(llvm::Constant*, llvm::ArrayRef<llvm::Value*>, bool) + 51
6  swift                    0x0000000101252c0b llvm::IRBuilder<true, llvm::ConstantFolder, llvm::IRBuilderDefaultInserter<true> >::CreateConstInBoundsGEP2_32(llvm::Value*, unsigned int, unsigned int, llvm::Twine const&) + 123
7  swift                    0x00000001012a6e7e swift::irgen::ElementLayout::project(swift::irgen::IRGenFunction&, swift::irgen::Address, swift::Optional<swift::irgen::NonFixedOffsetsImpl*>, llvm::Twine const&) const + 654
8  swift                    0x0000000101272ad3 swift::irgen::projectTupleElementAddress(swift::irgen::IRGenFunction&, swift::irgen::Address, swift::SILType, unsigned int) + 147
9  swift                    0x000000010129ab8a swift::SILVisitor<(anonymous namespace)::IRGenSILFunction, void>::visit(swift::ValueBase*) + 27402
10 swift                    0x000000010129384b swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) + 10267
11 swift                    0x000000010120d288 swift::irgen::IRGenModule::emitGlobalTopLevel() + 200
12 swift                    0x000000010128048c performIRGeneration(swift::IRGenOptions&, swift::Module*, swift::SILModule*, llvm::StringRef, llvm::LLVMContext&, swift::SourceFile*, unsigned int) + 1900
13 swift                    0x0000000101280e83 swift::performIRGeneration(swift::IRGenOptions&, swift::SourceFile&, swift::SILModule*, llvm::StringRef, llvm::LLVMContext&, unsigned int) + 51
14 swift                    0x00000001011e554c frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 5308
15 swift                    0x00000001011e294d main + 1677
16 libdyld.dylib            0x00007fff8df405fd start + 1

recursive_enum.swift

protocol TreeLike {}
enum Tree<T>:TreeLike {
  case Empty
  case Leaf(T)
  case Node(TreeLike, TreeLike)
}