LWPOLYLINE, is closed, one vertex = error

[verner-lall]

I have a dxf file exported from autocad. For some reason there's like 9 lwpolylines in there that have only one vertex and the closed attribute.
{ type: 'LWPOLYLINE', vertices: [ { x: 294.598692, y: 168.66373 } ], layer: '0', colorNumber: 7, closed: true, transforms: [] }
Now I understand this could be a pointless entity, but it throws an error in entityToPolyline.js on line 110, because the resulting polyline array is empty, so no polyline[0][0] or [0][1] values exist.

Should we catch this sort of error in this library? LibreCAD and AutoCAD have no problems opening this file.

[bjnortier]

I'll add a test case for this. I think the policy should be that warnings are generated for these kind of "illegal" entities, but that it shouldn't fail

[bjnortier]

Published as 3.1.0. You can close this issue is you're satisfied

[bjnortier]

FYI there's been a fix for another issue, #21, which will change the behaviour for this case slightly.

From 3.1.1, if a "closed" polyline with one vertex is encountered, the result will be a polyline with two vertices at the same position. I believe this is better than returning an empty polyline.