```d
import std.traits;

enum myuda;

class A { @myuda int x; }

class B : A
{
    @myuda int some;
    void foo() { foreach (s; getSymbolsByUDA!(typeof(this), myuda)) {} }
}

void main() { (new B).foo(); }
```

% rdmd uda_symbols.d
/usr/include/dmd/phobos/std/traits.d-mixin-7250(7250): Error: template instance/AliasSeq!(some, x) AliasSeq!(some, x) is nested in both B and A
/usr/include/dmd/phobos/std/traits.d(7259): Error: template instance std.traits.getSymbolsByUDA!(B, myuda).toSymbols!("some", "x") error instantiating uda_symbols.d(10):        instantiated from here: getSymbolsByUDA!(B, myuda)