[Gmsh] extruding Compound Line fails

[Nico Schlömer]

Hi all,

I'm trying to extrude a compound line, but inexplicably I'm getting
the error message

Impossible to extrude entity 5 (of type 214)

============ *snip* ============
// Points
p1 = newp;
Point(p1) = {0, 0.369615, 0.559808, 0.1};
p2 = newp;
Point(p2) = {0, 0.412917, 0.584808, 0.1};
p3 = newp;
Point(p3) = {0, 0.344615, 0.603109, 0.1};
p4 = newp;
Point(p4) = {0, 0.394615, 0.516506, 0.1};
p5 = newp;
Point(p5) = {0, 0.326314, 0.534808, 0.1};
// Circle arcs
c1 = newreg;
Circle(c1) = {p2, p1, p3};
c2 = newreg;
Circle(c2) = {p3, p1, p5};
c3 = newreg;
Circle(c3) = {p5, p1, p4};
c4 = newreg;
Circle(c4) = {p4, p1, p2};
l1 = newreg;
Compound Line(l1) = {c1,c2,c3,c4};
ex1[] = Extrude{{0.0,-0.5,0.866025403784}, {0.0,-0.15,0.259807621135},
2*Pi/3}{Line{l1};};
============ *snap* ============

What's going wrong?

--Nico