three.js: THREE.Line from THREE.ShapeGeometry is missing a line segment

Not sure but I think this is a bug or I at least expected something else…

I made a fiddle here to demonstrate…

// definition of a shape ( a 40x40 square)
shape = new THREE.Shape();
shape.moveTo( 0, 0 );
shape.lineTo( 40, 0 );
shape.lineTo( 40, 40 );
shape.lineTo( 0, 40 );
shape.lineTo( 0, 0 );

// convert the shape to geometry
var geometry = shape.makeGeometry();

// material
var material = new THREE.LineBasicMaterial( { color: 0xff0000, linewidth: 2 } );

// line
line = new THREE.Line( geometry,  material );
scene.add( line );

The last segment seems to be missing…