Avoid Graphviz error when hiding all pins (#375)

Fixes #257
wireviz · Jun 14, 2024 · 2f4fe11 · 2f4fe11
1 parent 2d38267
commit 2f4fe11
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
@@ -253,6 +253,9 @@ def create_graph(self) -> Graph:
 
                 pinhtml.append("  </table>")
 
+                if len(pinhtml) == 2:  # Table start and end with no rows between?
+                    pinhtml = ["<!-- all pins hidden -->"]  # Avoid Graphviz error
+
                 html = [
                     row.replace("<!-- connector table -->", "\n".join(pinhtml))
                     for row in html