### Godot version

4.0 beta 10

### System information

Windows 10

### Issue description

Godot crashes when i accidently name 2 items in an enum the same

EDIT:
The editor freeze for some seconds, then both editor- and console-window dissapear

### Steps to reproduce

Write

```gdscript
enum {
    A,
}
```

and then add a second line with another A:

```gdscript
enum {
    A,
    A # <- crash
}
```

Does not always immediatly happen if i copy&paste items.
Does not happen when i change the script in another editor and open the script in Godot.

### Minimal reproduction project

[enum.zip](https://github.com/godotengine/godot/files/10313759/enum.zip)

#include "gdscript_analyzer.h"
#include "core/config/engine.h"
#include "core/config/project_settings.h"
#include "core/core_string_names.h"
#include "core/io/file_access.h"
#include "core/io/resource_loader.h"
#include "core/object/class_db.h"
#include "core/object/script_language.h"
#include "core/templates/hash_map.h"
#include "gdscript.h"
#include "gdscript_utility_functions.h"
#include "scene/resources/packed_scene.h"
#define UNNAMED_ENUM "<anonymous enum>"
#define ENUM_SEPARATOR "::"
static MethodInfo info_from_utility_func(const StringName &p_function) {