fix NoneType error in auto_fill travel (#3659)

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/stitches/auto_fill.py b/lib/stitches/auto_fill.py
index d5dd1d7d..bcde63e7 100644
--- a/lib/stitches/auto_fill.py
+++ b/lib/stitches/auto_fill.py
@@ -894,6 +894,10 @@ def travel(shape, travel_graph, edge, running_stitch_length, running_stitch_tole
         path = [InkstitchPoint.from_tuple(point) for point in path]
     if len(path) > 1:
         path = clamp_path_to_polygon(path, shape)
+    elif not path:
+        # This may happen on very small shapes.
+        # Simply return nothing as we do not want to error out
+        return []
 
     points = even_running_stitch(path, running_stitch_length, running_stitch_tolerance)
     stitches = [Stitch(point) for point in points]