try address sanitizer

Author: geneotech

src/rectpack2D/finders_interface.h

@@ -102,7 +102,7 @@ namespace rectpack2D {
 		auto ith_order = [&orders, n = count_valid_subjects](const std::size_t i) {
 			return order_type(
 				orders.get() + i       * n,
-				orders.get() + (i + 1) * n
+				orders.get() + (i + 2) * n
 			);
 		};