invalidate UI render instance cache when freeing model instances#7514
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Fixes a startup assertion failure in Star Fox: Event Horizon, where a Lua call to gr.freeAllModels() wiped Polygon_model_instances but left the UI render instance cache holding stale indices. The next state transition called model_clear_cached_ui_render_instances() which asserted in model_delete_instance(). Closes scp-fs2open#7513 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Goober5000
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fix
wookieejedi
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Jun 9, 2026
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Fixes a startup assertion failure in Star Fox: Event Horizon, where a Lua call to gr.freeAllModels() wiped Polygon_model_instances but left the UI render instance cache holding stale indices. The next state transition called model_clear_cached_ui_render_instances() which asserted in model_delete_instance().
Closes #7513