for v2.072.0-b2

```sh
struct embed(T) {
                T embed_instance ;
    @property payload() {
                return embed_instance ;
        }
}
class Bufferz {
        alias owner this ;
                Buffer* _owner ;
auto owner() {
                return _owner ;
        }

}

struct Buffer {
                alias range this ;
                embed!Bufferz _range ;
                auto range() {
                        return _range.payload ;
                }
                ref slice() {
Slice;
                }
        pragma(inline)
{
        }

}
```

(In reply to changlon from comment #1)

Reduced/simplified further:

----
class Bufferz
{
    alias owner this;
    Buffer owner() { return Buffer.init; }
}

struct Buffer
{
    alias range this;
    Bufferz range() { return Bufferz.init; }
    void slice() { error; }
}
----

You marked this as a regression, but you didn't specify which previous version of dmd doesn't have the problem. For a bug to be a regression, the code must have worked at some point. Downgrading to "normal".

Compiling this with dmd 2.081 issues:

Error: undefined identifier embed_instance

and no seg fault. Closing as fixed