Where does the 'override' qualifier go with trailing return types?

like this:

class I
{
    virtual auto Func() -> void = 0;
};

class C : public I
{
    auto Func() -> void override;
};

It works in gcc since 4.8.1:
https://godbolt.org/z/TbTTwa

According to the standard, 8.4.1, a declarator for a function includes the trailing-return-type, and a class function definition contains "declarator virt-specifier-seq_opt". The second one, virt-specifier-seq, is one of final or override, so those come after the trailing return type. (I.e. Clang gets it right.)