Miguel de Icaza
8a9fd16112
I believe the crash is a stale-lifetime bug in 3D picking. Viewport::_process_picking() caches last_object / last_id for multiple queued input events at the same pointer position. If the first _input_event callback removes the picked CollisionObject3D or current Camera3D from the tree, the next queued event can still reuse that cached target and call _collision_object_3d_input_event(), which immediately does get_global_transform on an object that is no longer safe to query. The patch does four things: 1. It rejects captured 3D pick targets that are no longer is_inside_tree() before reuse at viewport.cpp (similar changes exist in the code): 2. It re-fetches the cached same-position object from ObjectDB, verifies it still matches the cached pointer, and verifies it is still in the tree before dispatching. 3. It skips _mouse_exit() for a hovered 3D object that has already left the tree at viewport.cpp. 4. It adds a final guard inside _collision_object_3d_input_event() so even a future caller cannot query transforms on removed nodes or cameras at viewport.cpp.
Godot Engine
2D and 3D cross-platform game engine
Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel. Games can be exported with one click to a number of platforms, including the major desktop platforms (Linux, macOS, Windows), mobile platforms (Android, iOS), as well as Web-based platforms and consoles.
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Before being open sourced in February 2014, Godot had been developed by Juan Linietsky and Ariel Manzur for several years as an in-house engine, used to publish several work-for-hire titles.
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