### Godot version

4.0 -> latest

**I've tested all this versions:**
4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4
4.1, 4.1.1
4.2 dev 4

in all this versions problem exists.

### System information

Fedora 38, macOS

### Issue description

I have found a very strange bug while generating translations. The presence of a method modifying the dictionary's content causes the editor to crash during the generation of the translation template.

The mere presence of an uninvoked method causes a crash.

**Edit: The issue occurs not only with singletons. Any script containing a method that modifies any dictionary leads to a crash.**

### Steps to reproduce

**Project -> Project Settings -> Localizations -> Generate POT -> Add (Add your singleton)**

```
extends Node

var session_data = {
	"coins" : 0,
	"power": 0
}

var shop_items = [
	{
		"id": "max_hp",
		"name": tr("First Shop Item"),
		"desc": tr("Great tool."),
	}
]

func add_power(val: int):
	session_data["power"] += val
```

_⚠️ Problem is in add_power method, not in shop_items._


**Project -> Project Settings -> Localizations -> Generate POT -> Generate**

And... Crash.


[Nagranie ekranu z 2023-09-14 13-10-42.webm](https://github.com/godotengine/godot/assets/5132385/6a00805a-34c8-408e-9b00-eb5875301312)



### Minimal reproduction project

[translation_gm_crash.zip](https://github.com/godotengine/godot/files/12104763/translation_gm_crash.zip)

_Just open project and go to: Project -> Project Settings -> Localizations -> Generate POT -> Generate_

StringName assignee_name;
	if (p_assignment->assignee->type == GDScriptParser::Node::IDENTIFIER) {
		assignee_name = static_cast<const GDScriptParser::IdentifierNode *>(p_assignment->assignee)->name;
	} else if (p_assignment->assignee->type == GDScriptParser::Node::SUBSCRIPT) {
		assignee_name = static_cast<const GDScriptParser::SubscriptNode *>(p_assignment->assignee)->attribute->name;
	}
	if (assignment_patterns.has(assignee_name) && _is_constant_string(p_assignment->assigned_value)) {
		
		ids->push_back(p_assignment->assigned_value->reduced_value);
	} else if (assignee_name == fd_filters && p_assignment->assigned_value->type == GDScriptParser::Node::CALL) {
		
		
		const GDScriptParser::CallNode *call_node = static_cast<const GDScriptParser::CallNode *>(p_assignment->assigned_value);
		if (call_node->arguments[0]->type == GDScriptParser::Node::ARRAY) {
			const GDScriptParser::ArrayNode *array_node = static_cast<const GDScriptParser::ArrayNode *>(call_node->arguments[0]);
			
			for (int i = 0; i < array_node->elements.size(); i++) {
				_extract_fd_constant_strings(array_node->elements[i]);
			}
		}
	} else {
		
		_assess_expression(p_assignment->assigned_value);
	}
}
void GDScriptEditorTranslationParserPlugin::_extract_from_call(const GDScriptParser::CallNode *p_call) {