### 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)

}
					if (setter_function == nullptr) {
						push_error(vformat(R"(Setter "%s" not found.)", member.variable->setter_pointer->name), member.variable);
					} else if (setter_function->parameters.size() != 1) {
						push_error(vformat(R"(Function "%s" cannot be used as setter because of its signature.)", setter_function->identifier->name), member.variable);
					} else if (!is_type_compatible(member.variable->datatype, setter_function->parameters[0]->datatype, true)) {
						push_error(vformat(R"(Function with argument type "%s" cannot be used as setter for a property of type "%s".)", setter_function->parameters[0]->datatype.to_string(), member.variable->datatype.to_string()), member.variable);
					} else {
						has_valid_setter = true;
#ifdef DEBUG_ENABLED
						if (member.variable->datatype.builtin_type == Variant::FLOAT && setter_function->parameters[0]->datatype.builtin_type == Variant::INT) {
							parser->push_warning(member.variable, GDScriptWarning::NARROWING_CONVERSION);
						}
#endif
					}
				}
				if (member.variable->datatype.is_variant() && has_valid_getter && has_valid_setter) {
					if (!is_type_compatible(getter_function->datatype, setter_function->parameters[0]->datatype, true)) {
						push_error(vformat(R"(Getter with type "%s" cannot be used along with setter of type "%s".)", getter_function->datatype.to_string(), setter_function->parameters[0]->datatype.to_string()), member.variable);
					}
				}
#ifdef DEBUG_ENABLED
				parser->ignored_warning_codes = previously_ignored;
#endif 
			}
		}
	}
	parser->current_class = previous_class;
}
void GDScriptAnalyzer::resolve_class_body(GDScriptParser::ClassNode *p_class, bool p_recursive) {