try-finally statement with only a debug statement in finally body causes assertion failure

test looks like this:

void main()
{
    try
    {
    }
    finally
    {
        debug {} // the debug statement body can be anything
    }
}

it should be noted that the code works when compiled with -debug

Fixed in [652].

This seems to be a general issue with the DMD frontend. For {} finalbody would have been != null, but for { debug {} } it *is* NULL.