ST_Intersection give results that are inconsistent with ST_Distance

[nbvfgh]

SELECT ST_Distance(geom.a, geom.b), ST_AsText(ST_Intersection(geom.a, geom.b))
    FROM (SELECT ST_GeomFromText('POLYGON ((2 0, 0 2, 0 0, 2 0))') As a,
    ST_GeomFromText('POINT(0.4 1.6)') As b) As geom;
-- expected: {0, POINT(0.4, 1.6)}
-- actual  : {0, POINT EMPTY}

ST_Intersection: Returns a geometry representing the point-set intersection of two geometries. In other words, that portion of geometry A and geometry B that is shared between the two geometries.

The distance from POINT(0.4 1.6)) to LINESTRING(2 0, 0 2) is 0, but the ST_Intersection(a, b) returns EMPTY.

[nbvfgh]

bug tracker: libgeos/geos#1207