Cannot read property '0' of undefined while rotating the map

[ghost]

Hi ofrohn,

the following error will freeze the celestial map so I can't rotate the map anymore. I am trying to figure out when it happens..it seems to happen when I am using the mouse wheel to zoom in/out and, at the same time, the mouse pointer exits from the region's map.

celestial.js:880 Uncaught TypeError: Cannot read property '0' of undefined
at Function.forward.invert (celestial.js:880)
at Function.Ct.n.invert.t.invert.e.invert (d3.min.js:1)
at Function.e [as invert] (d3.min.js:2)
at position (celestial.js:2551)
at HTMLCanvasElement. (celestial.js:2437)
at HTMLCanvasElement.t (d3.min.js:1)
at d3.min.js:1
at l (d3.min.js:3)
at HTMLCanvasElement.p (d3.min.js:3)
at HTMLCanvasElement.__onwheel.zoom (d3.min.js:1)
forward.invert @ celestial.js:841
Ct.n.invert.t.invert.e.invert @ d3.min.js:1
e @ d3.min.js:2
position @ celestial.js:3738
(anonymous) @ celestial.js:3631
t @ d3.min.js:1
(anonymous) @ d3.min.js:1
l @ d3.min.js:3
p @ d3.min.js:3
(anonymous) @ d3.min.js:1

This is another error that happens when the mouse pointer exits from the map's region while I am rotating the map (i.e. while I am holding down the left mouse button). By the way, it doesn't make the celestial map crash.
Uncaught TypeError: Cannot read property '0' of undefined
at Function.forward.invert (celestial.js:880)
at Function.Ct.n.invert.t.invert.e.invert (d3.min.js:1)
at Function.e [as invert] (d3.min.js:2)
at position (celestial.js:2551)
at HTMLCanvasElement. (celestial.js:2449)
at HTMLCanvasElement.t (d3.min.js:1)
at d3.min.js:1
at c (d3.min.js:3)
at n (d3.min.js:3)
at d3.min.js:1
forward.invert @ celestial.js:841
Ct.n.invert.t.invert.e.invert @ d3.min.js:1
e @ d3.min.js:2
position @ celestial.js:3738
(anonymous) @ celestial.js:3637
t @ d3.min.js:1
(anonymous) @ d3.min.js:1
c @ d3.min.js:3
n @ d3.min.js:3
(anonymous) @ d3.min.js:1

Any help will be great. Thank you in advance.

[ofrohn]

I clicked, dragged and zoomed with the mouse all over the place like a ninny, but couldn,t trigger the error on any test environment available to me.
However, the fault has to be in the invert method of the projection, so I tried ignoring invalid coordinate values, and hope D3 throws them away too.
Can you check if the issue still appears? If not, fixing it may take some time, because
Function.Ct.n.invert.t.invert.e.invert (d3.min.js:1)
D3 sure has some interesting ways to do things!