From 6014f3fb43502ce9dcbfd2abb6f087f6eef76033 Mon Sep 17 00:00:00 2001
From: ocidburn <79639602+ocidburn@users.noreply.github.com>
Date: Sat, 5 Sep 2026 22:05:11 +0200
Subject: [PATCH] Fix: guard the fifth null deref of the same kind, on the
 project-settings path (#15451)

---
 src/libslic3r/Config.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index a2756a9f8e..394cfb5b74 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -1049,7 +1049,8 @@ int ConfigBase::load_from_json(const std::string &file, ConfigSubstitutionContex
                 std::vector<std::string>& different_settings = this->option<ConfigOptionStrings>("different_settings_to_system", true)->values;
                 size_t size = different_settings.size();
                 if (size == 0) {
-                    size = this->option<ConfigOptionStrings>("filament_settings_id")->values.size() + 2;
+                    const auto *filament_ids = this->option<ConfigOptionStrings>("filament_settings_id");
+                    size = (filament_ids ? filament_ids->values.size() : 0) + 2;
                     different_settings.resize(size);
                 }