From a4388010bd289f15d57044b208a2aa2116f76332 Mon Sep 17 00:00:00 2001
From: "zhimin.zeng" <zhimin.zeng@bambulab.com>
Date: Wed, 5 Mar 2025 15:48:13 +0800
Subject: [PATCH] FIX: fix slice core dumped problem

enable timelapse and the first layer has no toolchange
jira: STUDIO-10698

Change-Id: Ia503efe4a143fe98f67cd3913b7745d74b113170
---
 src/libslic3r/GCode/WipeTower.cpp | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/libslic3r/GCode/WipeTower.cpp b/src/libslic3r/GCode/WipeTower.cpp
index ca6f773b0..a15c151eb 100644
--- a/src/libslic3r/GCode/WipeTower.cpp
+++ b/src/libslic3r/GCode/WipeTower.cpp
@@ -3779,11 +3779,10 @@ void WipeTower::generate_new(std::vector<std::vector<WipeTower::ToolChangeResult
         // generate tool change
         bool insert_wall = false;
         int  insert_finish_layer_idx = -1;
+        if (wall_idx != -1 && m_enable_timelapse_print) {
+            timelapse_wall = only_generate_out_wall(true);
+        }
         for (int i = 0; i < int(layer.tool_changes.size()); ++i) {
-            if (i == 0 && m_enable_timelapse_print) {
-                timelapse_wall = only_generate_out_wall(true);
-            }
-
             ToolChangeResult wall_gcode;
             if (i == 0 && (layer.tool_changes[i].old_tool == wall_idx)) {
                 finish_layer_tcr = finish_layer_new(m_enable_timelapse_print ? false : true, false, false);
@@ -3811,7 +3810,7 @@ void WipeTower::generate_new(std::vector<std::vector<WipeTower::ToolChangeResult
         // insert finish block
         if (wall_idx != -1) {
             if (layer.tool_changes.empty()) {
-                finish_layer_tcr = finish_layer_new(true, false, false);
+                finish_layer_tcr = finish_layer_new(m_enable_timelapse_print ? false : true, false, false);
             }
 
             for (WipeTowerBlock& block : m_wipe_tower_blocks) {
@@ -3891,7 +3890,7 @@ void WipeTower::generate_new(std::vector<std::vector<WipeTower::ToolChangeResult
                 layer_result[insert_finish_layer_idx] = merge_tcr(layer_result[insert_finish_layer_idx], finish_layer_tcr);
         }
 
-        if (m_enable_timelapse_print) {
+        if (m_enable_timelapse_print && !timelapse_wall.gcode.empty()) {
             layer_result.insert(layer_result.begin(), std::move(timelapse_wall));
         }
         result.emplace_back(std::move(layer_result));