Executing CodeEdit functions crashes Godot

[qarmin]

Godot version

4.0.beta.custom_build. a4c2d8d

System information

Ubuntu 22.10 - AMD RX 470, Gnome shell 43 X11

Issue description

When executing

 extends Node
func _process(delta):

	var temp_variable382 = CodeEdit.new()
	add_child(temp_variable382)
	temp_variable382.set_highlight_matching_braces_enabled(true)
	temp_variable382.begin_complex_operation()
	temp_variable382.do_indent()
	temp_variable382.do_indent()
	temp_variable382.unindent_lines()
	temp_variable382.undo()
	temp_variable382.queue_free()

Godot crashes:

 Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] ./godot.linuxbsd.editor.dev.x86_64.san(+0x3aae9adc) [0x55b4d2828adc] (/home/runner/work/Qarminer/Qarminer/godot/platform/linuxbsd/crash_handler_linuxbsd.cpp:57)
[2] /lib/x86_64-linux-gnu/libc.so.6(+0x42520) [0x7f98667c4520] (??:0)
[3] CowData<char32_t>::get(int) const (/home/runner/work/Qarminer/Qarminer/godot/./core/templates/cowdata.h:155 (discriminator 7))
[4] String::operator[](int) const (/home/runner/work/Qarminer/Qarminer/godot/./core/string/ustring.h:224)
[5] TextEdit::_notification(int) (/home/runner/work/Qarminer/Qarminer/godot/scene/gui/text_edit.cpp:616 (discriminator 3))
[6] TextEdit::_notificationv(int, bool) (/home/runner/work/Qarminer/Qarminer/godot/./scene/gui/text_edit.h:42 (discriminator 14))
[7] CodeEdit::_notificationv(int, bool) (/home/runner/work/Qarminer/Qarminer/godot/scene/gui/code_edit.h:37 (discriminator 3))
[8] Object::notification(int, bool) (/home/runner/work/Qarminer/Qarminer/godot/core/object/object.cpp:792)
[9] CanvasItem::_redraw_callback() (/home/runner/work/Qarminer/Qarminer/godot/scene/main/canvas_item.cpp:136)
[10] void call_with_variant_args_helper<CanvasItem>(CanvasItem*, void (CanvasItem::*)(), Variant const**, Callable::CallError&, IndexSequence<>) (/home/runner/work/Qarminer/Qarminer/godot/./core/variant/binder_common.h:298 (discriminator 4))
[11] void call_with_variant_args<CanvasItem>(CanvasItem*, void (CanvasItem::*)(), Variant const**, int, Callable::CallError&) (/home/runner/work/Qarminer/Qarminer/godot/./core/variant/binder_common.h:393)
[12] CallableCustomMethodPointer<CanvasItem>::call(Variant const**, int, Variant&, Callable::CallError&) const (/home/runner/work/Qarminer/Qarminer/godot/./core/object/callable_method_pointer.h:105)
[13] Callable::callp(Variant const**, int, Variant&, Callable::CallError&) const (/home/runner/work/Qarminer/Qarminer/godot/core/variant/callable.cpp:64)
[14] MessageQueue::_call_function(Callable const&, Variant const*, int, bool) (/home/runner/work/Qarminer/Qarminer/godot/core/object/message_queue.cpp:230)
[15] MessageQueue::flush() (/home/runner/work/Qarminer/Qarminer/godot/core/object/message_queue.cpp:277)
[16] SceneTree::process(double) (/home/runner/work/Qarminer/Qarminer/godot/scene/main/scene_tree.cpp:470 (discriminator 4))
[17] Main::iteration() (/home/runner/work/Qarminer/Qarminer/godot/main/main.cpp:3159)
[18] OS_LinuxBSD::run() (/home/runner/work/Qarminer/Qarminer/godot/platform/linuxbsd/os_linuxbsd.cpp:880)
[19] ./godot.linuxbsd.editor.dev.x86_64.san(main+0x58f) [0x55b4d2828488] (/home/runner/work/Qarminer/Qarminer/godot/platform/linuxbsd/godot_linuxbsd.cpp:75)
[20] /lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f98667abd90] (??:0)
[21] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f98667abe40] (??:0)
[22] ./godot.linuxbsd.editor.dev.x86_64.san(_start+0x25) [0x55b4d2827e35] (??:?)

This example was found by Godot fuzzer - Qarminer, so it is quite unlikelly that this code could be used in real project, but still this should be handled gracefully.

Memory leaks or asan backtraces are visibe when using Godot build with sanitizers support - https://github.com/qarmin/GodotBuilds/actions (linux -> linux-editor-sanitizers)

Steps to reproduce

Above

Minimal reproduction project

N/A

[MewPurPur]

Complex operations must be ended before doing UndoRedo, so the crash might be related to this. queue_free() shouldn't have anything to do with the crash.