I didn't make any changes in the project settings or something, but I did change some GDScript. After I did that, every time I open a different scene in the scene dock the Engine crashes. This right here is the backtrace:
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handle_crash: Program crashed with signal 11
Engine version: Godot Engine v4.2.2.stable.official (15073afe3856abd2aa1622492fe50026c7d63dc1)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] /lib/x86_64-linux-gnu/libc.so.6(+0x3c050) [0x7fbfbac9c050] (??:0)
[2] godot::SceneTree::get_edited_scene_root() const (??:0)
[3] OrchestratorMainView::_on_scene_tab_changed(int) (??:0)
[4] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x3b38b48] (??:0)
[5] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x3ba02d0] (??:0)
[6] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x15aca36] (??:0)
[7] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x3ba02d0] (??:0)
[8] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x2391ef6] (??:0)
[9] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x23a255d] (??:0)
[10] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x20cdda5] (??:0)
[11] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x2126a2e] (??:0)
[12] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x212884e] (??:0)
[13] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x21376e9] (??:0)
[14] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x420ac0e] (??:0)
[15] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x493d3f] (??:0)
[16] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x3963f82] (??:0)
[17] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x396575f] (??:0)
[18] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x497bfd] (??:0)
[19] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x41e8a6] (??:0)
[20] /lib/x86_64-linux-gnu/libc.so.6(+0x2724a) [0x7fbfbac8724a] (??:0)
[21] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85) [0x7fbfbac87305] (??:0)
[22] /home/marty/Schreibtisch/Godot_v4.2.2-stable_linux.x86_64() [0x42a59a] (??:0)
-- END OF BACKTRACE --
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I can also share the project files if that would be useful (I plan on open-sourcing it either way). I am using Debain 12 (GNU/Linux) using Gnome. In the backtrace I used Godot 4.2.2, but until just now where the crashes set in, I was using the latest Godot 4.3 dev6 build. So these crashes don't occur because of the dev builds.
Signal 11 is a segmentation fault on Linux systems. It means your program (Godot) is trying to access memory that doesn't belong to it. If it showed up in Dev6, it would most certainly help to file a formal bug report.
That may also help you narrow the issue down on your end, but this is part of why you never want to risk using a dev build on a real project. They just aren't done yet.