Crash

When I run the following script, nodebox crashes. It doesn't always crash right away, and sometimes I get to see the output, but it crashes every time. I would really appreciate any insight.

def circle(x,y,r):
    d = 2*r
    return oval(x-r,y-r,d,d, draw=False)
    
 
def sunshape(x,y,r1,r2=100,segments=7,width=.4):
    a = circle(x,y,r1)
    b = circle(x,y,r2)
    
    autoclosepath(False)
    beginpath()
    
    for i in range(segments):
        t1 = float(i)/segments
        t2 = float(i+width)/segments
        
        a1 = a.point(t1)
        a2 = a.point(t2)
        b1 = b.point(t1)
        b2 = b.point(t2)
        
        moveto(a1.x, a1.y)
        lineto(a2.x, a2.y)
        lineto(b2.x, b2.y)
        lineto(b1.x, b1.y)
        lineto(a1.x, a1.y)
    
    p = endpath(draw = False)
    p = p.union(a)
    return p
    
q = sunshape(150,200,50)
 
fill(0.4,0.2,0,0.2)
stroke(0.6,0.2,0,0.3)
strokewidth(3)
drawpath(q)

The crash happens when calling p.union(a). A memory problem in the underlying GPC module occurs. Unfortunately C-code is a little harder to evaluate so the bug hasn't been fixed yet. We'll have a look at it.

Thanks Tom. Is there a bug report with GPC or some sort of resolution in the works? Is there anything unusual about the paths in my script that make GPC fail?Thanks for your help.

Does anyone have any more information regarding this bug? Thanks,