message: [SwiftASTContext] Stop asking size for types that don't exist in memory.
  <rdar://problem/47194104>
diff: @@ -5922,9 +5922,6 @@ SwiftASTContext::GetBitSize(lldb::opaque_compiler_type_t type,
  const swift::TypeKind type_kind = swift_can_type->getKind();
  switch (type_kind) {
  - case swift::TypeKind::LValue:
  - case swift::TypeKind::UnboundGeneric:
  - case swift::TypeKind::GenericFunction:
  case swift::TypeKind::Function:
  return GetPointerByteSize() * 8;
  default:
  