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.
I don't think this community will be of much help with a Segmentation Fault.
Ideally you would report this along with a minimal project where it happens. In your case, since you don't really know how it started, stripping back as much as you can from your project and uploading that would probably be helpful for the devs.
In the report you should be very clear which version you were using when it happened the first time (4.3 dev6?), and which other version also keeps crashing after this (4.2.2?).