Keyword scope as qualifier on destructors

[Nordlöw via Digitalmars-d-learn]

What effect does `scope`-qualification have for destructors such 
as

    ~this() @trusted scope;
used here

https://github.com/dlang/dmd/pull/7284/files#diff-da63c10313833b6da044c7e5e3a85c03R67

?