From 107cd3edb05ef7327d6925aa352082f1168473e0 Mon Sep 17 00:00:00 2001
From: SoftFever <softfeverever@gmail.com>
Date: Sun, 9 Feb 2025 19:59:30 +0800
Subject: [PATCH] fix a crash bug when generating support (#8357)

---
 src/clipper/clipper.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/clipper/clipper.hpp b/src/clipper/clipper.hpp
index aee1a02f8f..359ce32819 100644
--- a/src/clipper/clipper.hpp
+++ b/src/clipper/clipper.hpp
@@ -337,7 +337,7 @@ public:
     TEdge *p_edge = edges.data();
     i = 0;
     for (const Path &pg : paths_provider) {
-      if (num_edges[i]) {
+      if (num_edges[i] && !pg.empty()) {
         bool res = AddPathInternal(pg, num_edges[i] - 1, PolyTyp, Closed, p_edge);
         if (res) {
           p_edge += num_edges[i];