fix a couple crashes

2 files changed, 7 insertions, 0 deletions

diff --git a/lib/stitch_plan/stitch_plan.py b/lib/stitch_plan/stitch_plan.py
index 0fa87d71..a7cd60e8 100644
--- a/lib/stitch_plan/stitch_plan.py
+++ b/lib/stitch_plan/stitch_plan.py
@@ -45,6 +45,10 @@ def patches_to_stitch_plan(patches, collapse_len=3.0 * PIXELS_PER_MM):
             color_block.add_stitch(stop=True)
             color_block = stitch_plan.new_color_block(color_block.color)
 
+    if len(color_block) == 0:
+        # last block ended in a stop, so now we have an empty block
+        del stitch_plan.color_blocks[-1]
+
     stitch_plan.filter_duplicate_stitches()
     stitch_plan.add_ties()
 
diff --git a/lib/svg/svg.py b/lib/svg/svg.py
index 5552abd8..48b1343a 100644
--- a/lib/svg/svg.py
+++ b/lib/svg/svg.py
@@ -37,6 +37,9 @@ def color_block_to_realistic_stitches(color_block, svg):
     paths = []
 
     for point_list in color_block_to_point_lists(color_block):
+        if not point_list:
+            continue
+
         color = color_block.color.visible_on_white.darker.to_hex_str()
         start = point_list[0]
         for point in point_list[1:]: