From 499c2d45dfac06827cf7486e1c66b2c49280a01f Mon Sep 17 00:00:00 2001
From: supermerill <merill@free.fr>
Date: Wed, 20 Oct 2021 22:06:41 +0200
Subject: [PATCH] Fix crash when layer_height is 0 supermerill/SuperSlicer#1664

---
 src/libslic3r/PrintConfig.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 94864a683..223f409eb 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -6208,8 +6208,11 @@ std::set<const DynamicPrintConfig*> DynamicPrintConfig::update_phony(const std::
 
 //note: width<-> spacing conversion is done via float, so max 6-7 digit of precision.
 std::set<const DynamicPrintConfig*> DynamicPrintConfig::value_changed(const t_config_option_key& opt_key, const std::vector<DynamicPrintConfig*> config_collection) {
-
     if (opt_key == "layer_height") {
+        const ConfigOptionFloat* layer_height_option = find_option<ConfigOptionFloat>("layer_height", this, config_collection);
+        //if bad layer height, slip to be able to go to the check part without outputing exceptions.
+        if (layer_height_option && layer_height_option->value < EPSILON)
+            return {};
         if (!update_phony(config_collection).empty())
             return { this };
         return {};