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fix: bounds-check the toolchange flush-volume and HRC per-filament lookups (#15289)

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* fix: bounds-check the toolchange flush-volume and HRC per-filament lookups

GCode::set_extruder's toolchange flush-volume lookup and
GCodeProcessor::update_slice_warnings's HRC check index per-filament and
per-extruder arrays (flush_volumes_matrix, the filament map, the nozzle list)
by filament/extruder id. When a config leaves one of those arrays shorter than
the filament count (partial or legacy multi-extruder projects, minimal
configs), the reads run off the end: silent on a normal STL, a hard abort under
_GLIBCXX_ASSERTIONS.

Route both reads through bounds checks: the flush lookup falls back to no flush,
matching the existing unknown-old-filament branch beside it, and the HRC check
skips an unmapped filament, mirroring the required_nozzle_HRC guard on the line
above. When the arrays are sized to the filament count the values are unchanged,
so correctly-specified configs are unaffected.

* ci: retrigger checks
This commit is contained in:
Kris Austin
2026-09-15 09:46:31 -03:00
committed by GitHub
parent bd1304443c
commit ac3997c0d1
2 changed files with 6 additions and 4 deletions
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src/libslic3r/GCode/GCodeProcessor.cpp
+2 -2
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@@ -7596,8 +7596,8 @@ void GCodeProcessor::update_slice_warnings()
if (used_filaments[idx] < m_result.required_nozzle_HRC.size())
filament_hrc = m_result.required_nozzle_HRC[used_filaments[idx]];
int filament_extruder_id = m_filament_maps[used_filaments[idx]];
int extruder_hrc = nozzle_hrc_lists[filament_extruder_id];
int filament_extruder_id = used_filaments[idx] < m_filament_maps.size() ? m_filament_maps[used_filaments[idx]] : -1;
int extruder_hrc = (filament_extruder_id >= 0 && (size_t) filament_extruder_id < nozzle_hrc_lists.size()) ? nozzle_hrc_lists[filament_extruder_id] : 0;
BOOST_LOG_TRIVIAL(debug) << __FUNCTION__ << boost::format(": Check HRC: filament:%1%, hrc=%2%, extruder:%3%, hrc:%4%") % used_filaments[idx] % filament_hrc % filament_extruder_id % extruder_hrc;