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Subject: [geda-user] More about the polygon bug
From: Stefan Salewski <mail AT ssalewski DOT de>
To: geda-user AT delorie DOT com
Date: Tue, 14 Jan 2014 19:39:07 +0100
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The second file is the simplest test case I could come up with: a 
> single 0603 resistor and a single line segment. It can't get much 
> simpler than that.

Again, after applying the vim macro the bug is gone.

Even more interesting: As we have seen, the bug temporary disappears
when we delete a line and insert it again by undo operation. Obviously
next step: generate gerbers after undo. My result: Bug is gone. So my
guess is, it may really be more something like a rounding bug than a
wrong (dicer?) algorithm. Other idea: It depends on how elements are
stored inside pcb program, i.e. undo/redo may move elements to bottom of
a list. 

I still suffer from the GL bug -- after a few times loading pcb files
PCB program refuses to draw something, even after restarting, and
glxgears was extremly slow, so that I had to restart my computer. That
may be a real difficult to detect bug. The polygon bug should be not too
difficult for someone with some knowledge of internal PCB program, i.e.
what happens when undo/redo occurs.

Gabriel, please test your gerbers after undo/redo.

Best regards,

Stefan