--- a/lemon/path.h	2026-11-07 21:45:29.164271929 +0100
+++ b/lemon/path.h	2026-11-07 21:49:25.131534571 +0100
@@ -228,7 +228,7 @@
       int len = path.length();
       head.reserve(len);
       for (typename CPath::RevArcIt it(path); it != INVALID; ++it) {
-        head.push_back(it);
+        head.push_back(static_cast<const Arc&>(it));
       }
     }