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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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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);
}