The "Assign Return Value to New Variable" hint appears twice on the same expression, under certain circumstances. Example:

    import java.util.Collections;
    import static java.util.Collections.*;

    public class Test
    {
        public Object getFoo() { return null; }

        {
            getFoo();
            emptyList();
            this.getFoo();
            Collections.emptyList();
        }
    }

1) Move the caret on the "getFoo" word of the first getFoo() invocation
2) Press Alt+Enter -> the hint appears (once)
3) Press Escape to close the hint
4) Press Alt+Enter again -> now the hint appears twice
Further repetitions stay at two occurrences of the hint.

This also happens when the caret is on the first "emptyList", on "this" or on "Collections". It does not happen on the prefixed "getFoo" and the prefixed "emptyList".

(NB 6.9 Beta)