Attribute propragation should work properly:

It's just hilarious:

```d
nothrow:

struct Foo
{
    int bar()
    {
        return 0;
    }
}

void main()
{
    Foo().bar(); // ERROR: function onlineapp.Foo.bar is not nothrow
}
```

https://run.dlang.io/is/0N3633

See also: https://github.com/dlang/DIPs/pull/137, https://github.com/dlang/dmd/pull/9076