Value Struct with Unsafe Union

[v3xro]

This seems to be problematic:

attribute "fs_unsafeUnion";
attribute "fs_valueStruct";

struct Inner (fs_valueStruct) {
  flag: int8;
}

struct Inner2 (fs_valueStruct) {
  flag2: int16;
}

union Middle (fs_unsafeUnion) {
  Inner inner,
  Inner2 inner_two
}

struct Outer (fs_valueStruct) {
  a: int8,
  flags: Middle
}

I get (with latest version): error: structs may contain only scalar or struct fields. Since the middle union is unsafe and itself a fixed-sized struct, it should theoretically be possible to represent this?

[v3xro]

Actually nevermind this is a flatc limitation upstream - currently no handling of unions where the error originates https://github.com/google/flatbuffers/blame/27325e002a36b3de2999906a77ff13a14fb09471/src/idl_parser.cpp#L951