#487 Layer 0 lines are all extended into infinity when switching layers

[Norbert van Nobelen]

In 2.0.7 Linux, but also already observed in 1.0.X when switching layers all lines in layer 0 are extended into infinite length.
Lines do intersect and can be deleted. Lines can not be divided or trimmed.
This happens semi random. Key behavior seems to be the switching of layers. This destruction of layer 0 can happen from starting LibreCAD to working with it for prolonged period.

Current solution:
Save many times, keep backup copies of files (in case of accidental overwrite of a file with a corrupted layer 0 file.

Example file will be added once the issue occurs again (seems to be once to twice a day)

[Dongxu Li]

looks like you enabled "Help layer":

http://wiki.librecad.org/index.php/LibreCAD_users_Manual#Help_Layers

[Norbert van Nobelen]

Tested it and it looks like you are (partially/completely) right. This is in my opinion very unclear behavior. If you accidentally hit the "printer" icon, this behavior occurs.

Partially: The behavior as described in the link does not look like that anymore in V2.0.7 linux. Instead you have to click the "printer" icon on the layer list to get the behavior. The lines become of infinite length. I completely fail to see the usefullness of this behavior instead of confusing the user.

Possible solution:
Change request: Add a warning (with disable warning option for people who know this behavior) when clicking this "printer" icon in the layer list by accident.

[Norbert van Nobelen]

I created a change request as replacement of this issue: Can you please close this issue #487? Thanks :)