### Godot version

4.0.2

### System information

Ubuntu 22.04.1 LTS

### Issue description

So far I've found these ones:

![Screenshot from 2023-05-10 17-56-42](https://github.com/godotengine/godot/assets/85438892/b161b14a-cb7d-46fe-8398-816bf354a929)
![Screenshot from 2023-05-10 18-01-02](https://github.com/godotengine/godot/assets/85438892/b0fefcfb-4246-4ebb-ae7b-dd798d7a1d63)

But there are likely more like them. They are invalid, at least in the context I encountered them here (at the beginning of a regular line of script)

### Steps to reproduce

Type `Anchor` in the code editor.

### Minimal reproduction project

N/A
GDScriptParser::CompletionContext c = p_context;
		c.current_line = last_assign_line;
		r_type.assigned_expression = last_assigned_expression;
		if (_guess_expression_type(c, last_assigned_expression, r_type)) {
			return true;
		}
	}
	if (is_function_parameter && p_context.current_function && p_context.current_function->source_lambda == nullptr && p_context.current_class) {
		
		GDScriptParser::DataType base_type = p_context.current_class->base_type;
		while (base_type.is_set()) {
			switch (base_type.kind) {
				case GDScriptParser::DataType::CLASS:
					if (base_type.class_type->has_function(p_context.current_function->identifier->name)) {
						GDScriptParser::FunctionNode *parent_function = base_type.class_type->get_member(p_context.current_function->identifier->name).function;
						if (parent_function->parameters_indices.has(p_identifier->name)) {
							const GDScriptParser::ParameterNode *parameter = parent_function->parameters[parent_function->parameters_indices[p_identifier->name]];
							if ((!id_type.is_set() || id_type.is_variant()) && parameter->get_datatype().is_hard_type()) {
								id_type = parameter->get_datatype();
							}
							if (parameter->initializer) {
								GDScriptParser::CompletionContext c = p_context;
								c.current_function = parent_function;
								c.current_class = base_type.class_type;
								c.base = nullptr;
								if (_guess_expression_type(c, parameter->initializer, r_type)) {
									return true;
								}
							}
						}