Both examples:

int main()
{
    return cast(int)(.0>>0);
}


int main()
{
    return cast(int)(.0>>>0);
}


result in an ICE in the compiler. Whereas


int main()
{
    return cast(int)(.0<<0);
}

is handled perfectly fine.

As this is not supposed to be compilable, I assume that the error type isn't being handled as it should be.

Regards