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Fix crashes when loading old 3MF project (#11933)

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Enhance backward compatibility for filament extruder variants in 3MF project files
Fix crashes when loading old 3MF project
This commit is contained in:
SoftFever
2026-01-13 09:40:42 +08:00
committed by GitHub
parent 7bab2c2785
commit ccb7416a6d
3 changed files with 23 additions and 0 deletions
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7
src/libslic3r/PresetBundle.cpp
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@@ -3315,6 +3315,13 @@ void PresetBundle::load_config_file_config(const std::string &name_or_path, bool
filament_self_indice[index] = index + 1;
}
std::vector<int> filament_self_indice = std::move(config.option<ConfigOptionInts>("filament_self_index")->values);
// ORCA: Initialize filament_extruder_variant for backward compatibility with old 3mf files
// that don't have this option saved or have it with default single-element value
ConfigOptionStrings* filament_extruder_variant_opt = config.option<ConfigOptionStrings>("filament_extruder_variant");
if (!filament_extruder_variant_opt || filament_extruder_variant_opt->size() < num_filaments) {
std::vector<std::string>& filament_extruder_variant = config.option<ConfigOptionStrings>("filament_extruder_variant", true)->values;
filament_extruder_variant.resize(num_filaments, "Direct Drive Standard");
}
if (config.option("extruder_variant_list")) {
//3mf support multiple extruder logic
size_t extruder_count = config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();

4
src/libslic3r/PrintConfig.cpp
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@@ -8041,6 +8041,10 @@ size_t DynamicPrintConfig::get_parameter_size(const std::string& param_name, siz
static void extend_extruder_variant(DynamicPrintConfig& config, const unsigned int num_extruders)
{
// 1. Make sure the `extruder_variant_list` is the same length as extruder cnt
if (!config.has("extruder_variant_list")) {
config.set_key_value("extruder_variant_list",
new ConfigOptionStrings(std::vector<std::string>(num_extruders, "Direct Drive Standard")));
}
auto extruder_variant_opt = dynamic_cast<ConfigOptionStrings*>(config.option("extruder_variant_list"));
assert(extruder_variant_opt != nullptr);
extruder_variant_opt->resize(num_extruders, extruder_variant_opt); // Use the first option as the default value, so all extruders have the same variant

12
task.md Normal file
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@@ -0,0 +1,12 @@
Analyze the bug that it failed to load project(3mf) from old version.
It failed pass below check in PresetBundle::load_config_file_config function, hence throw error.
if (config.option("extruder_variant_list")) {
//3mf support multiple extruder logic
size_t extruder_count = config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
extruder_variant_count = config.option<ConfigOptionStrings>("filament_extruder_variant", true)->size();
if ((extruder_variant_count != filament_self_indice.size())
|| (extruder_variant_count < num_filaments)) {
assert(false);
BOOST_LOG_TRIVIAL(error) << __FUNCTION__ << boost::format(": invalid config file %1%, can not find suitable filament_extruder_variant or filament_self_index") % name_or_path;
throw Slic3r::RuntimeError(std::string("Invalid configuration file: ") + name_or_path);
}