CPGraphicsContext showing 2 non closed triangles and 2 non closed arcs built using CGPath

- (void)drawRect:(CGRect)rect
{
    var ctx = [[CPGraphicsContext currentContext] graphicsPort];
    
    CGContextSetFillColor(ctx, [CPColor redColor]);

    var path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 50,50);
    CGPathAddLineToPoint(path, NULL, 50,150);
    CGPathAddLineToPoint(path, NULL, 150,150);
    CGContextAddPath(ctx, path);
    
    path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 250,60);
    CGPathAddLineToPoint(path, NULL, 250,160);
    CGPathAddLineToPoint(path, NULL, 350,160);
    CGContextAddPath(ctx, path);

    var path = CGPathCreateMutable();
    CGPathAddArc(path, NULL, 100,250,50,0,Math.PI,1);
    CGContextAddPath(ctx, path);
    
    path = CGPathCreateMutable();
    CGPathAddArc(path, NULL, 300,260,50,0,Math.PI,1);
    CGContextAddPath(ctx, path);

    CGContextFillPath(ctx);
}

NSGraphicsContext showing 2 non closed triangles and 2 non closed arcs built using CGPath

- (void)drawRect:(NSRect)rect
{
    CGContextRef ctx = [[NSGraphicsContext currentContext] graphicsPort];
    
    CGContextSetRGBFillColor(ctx, 1, 0, 0, 1);
	
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 50,50);
    CGPathAddLineToPoint(path, NULL, 50,150);
    CGPathAddLineToPoint(path, NULL, 150,150);
    CGContextAddPath(ctx, path);
    
    path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 250,60);
    CGPathAddLineToPoint(path, NULL, 250,160);
    CGPathAddLineToPoint(path, NULL, 350,160);
    CGContextAddPath(ctx, path);
	
    path = CGPathCreateMutable();
    CGPathAddArc(path, NULL, 100,250,50,0,M_PI,1);
    CGContextAddPath(ctx, path);
    
    path = CGPathCreateMutable();
    CGPathAddArc(path, NULL, 300,260,50,0,M_PI,1);
    CGContextAddPath(ctx, path);
	
    CGContextFillPath(ctx);	
}