### 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)

GDScriptParser::DataType true_type;
	if (p_ternary_op->true_expr) {
		true_type = p_ternary_op->true_expr->get_datatype();
	} else {
		true_type.kind = GDScriptParser::DataType::VARIANT;
	}
	GDScriptParser::DataType false_type;
	if (p_ternary_op->false_expr) {
		false_type = p_ternary_op->false_expr->get_datatype();
	} else {
		false_type.kind = GDScriptParser::DataType::VARIANT;
	}
	if (true_type.is_variant() || false_type.is_variant()) {
		result.kind = GDScriptParser::DataType::VARIANT;
	} else {
		result = true_type;
		if (!is_type_compatible(true_type, false_type)) {
			result = false_type;
			if (!is_type_compatible(false_type, true_type)) {
				result.type_source = GDScriptParser::DataType::UNDETECTED;
				result.kind = GDScriptParser::DataType::VARIANT;
#ifdef DEBUG_ENABLED
				parser->push_warning(p_ternary_op, GDScriptWarning::INCOMPATIBLE_TERNARY);
#endif
			}
		}
	}
	p_ternary_op->set_datatype(result);
}
void GDScriptAnalyzer::reduce_unary_op(GDScriptParser::UnaryOpNode *p_unary_op) {