### 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
if (p_context.type != GDScriptParser::COMPLETION_SUPER_METHOD) {
						r_type.type = p_context.current_class->get_datatype();
					} else {
						r_type.type = p_context.current_class->base_type;
					}
					found = true;
				}
			} break;
			case GDScriptParser::Node::IDENTIFIER: {
				const GDScriptParser::IdentifierNode *id = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
				found = _guess_identifier_type(p_context, id, r_type);
			} break;
			case GDScriptParser::Node::DICTIONARY: {
				
				const GDScriptParser::DictionaryNode *dn = static_cast<const GDScriptParser::DictionaryNode *>(p_expression);
				Dictionary d;
				bool full = true;
				for (int i = 0; i < dn->elements.size(); i++) {
					GDScriptCompletionIdentifier key;
					if (_guess_expression_type(p_context, dn->elements[i].key, key)) {
						if (!key.type.is_constant) {
							full = false;
							break;
						}
						GDScriptCompletionIdentifier value;
						if (_guess_expression_type(p_context, dn->elements[i].value, value)) {
							if (!value.type.is_constant) {
								full = false;
								break;
							}