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-rw-r--r--gerber/render/render.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/gerber/render/render.py b/gerber/render/render.py
index a5ae38e..41b632c 100644
--- a/gerber/render/render.py
+++ b/gerber/render/render.py
@@ -132,6 +132,8 @@ class GerberContext(object):
self._invert = invert
def render(self, primitive):
+ if not primitive:
+ return
color = (self.color if primitive.level_polarity == 'dark'
else self.background_color)
if isinstance(primitive, Line):