Retrieving optional member value fails if None is assigned in linear history

[heinezen]

When the value of an optional nyan member is retrieved but the value is None, the retrieval currently fails with the error

Traceback (most recent call last):
 -> ? [0x555555569845]
 -> __libc_start_main+0x8b [0x7ffff742a28b]
 -> ? [0x7ffff742a1ca]
 -> ? [0x55555556ca68]
 -> ? [0x55555556bfa6]
 -> ? [0x555555569f94]
 -> std::optional<std::shared_ptr<nyan::Object> > nyan::Object::get_optional<nyan::Object, true>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long) const+0x44 [0x7ffff7e7d144]
 -> std::optional<std::shared_ptr<nyan::ObjectValue> > nyan::Object::get_optional<nyan::ObjectValue, true>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long) const+0x5e [0x7ffff7e7f6c2]
 -> nyan::Object::get_value(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long) const+0x43 [0x7ffff7e7ca79]
 -> nyan::Object::calculate_value(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long) const+0x2cf [0x7ffff7e7d52b]
 -> nyan::Value::apply(nyan::Member const&)+0x51 [0x7ffff7ed920d]
 -> nyan::None::apply_value(nyan::Value const&, nyan::nyan_op)+0x69 [0x7ffff7ebcd03]
 -> nyan::InternalError::InternalError(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x2e [0x7ffff7e6148c]
 -> nyan::Error::Error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, bool)+0xed [0x7ffff7e60a83]
 -> nyan::Backtrace::analyze()+0x64 [0x7ffff7e60508]
nyan::InternalError:
None can't get an applied value - assign Value directly to member instead

Note that this only happens when None is assigned in a parent member.

How to reproduce

nyan data:

First():
    member : optional(int) = None

Second(First):
    pass

Code:

Object second = db.get_object("Second");
std::optional<int> member_val = second.get_optional<int, true>("member");

Expected Result

optional member values can be retrieved without crashes.