### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
Vector<Expression> expression;
	
	while (true) {
		Node *expr = nullptr;
		TkPos prepos = _get_tkpos();
		Token tk = _get_token();
		TkPos pos = _get_tkpos();
		bool is_const = false;
		if (tk.type == TK_PARENTHESIS_OPEN) {
			
			expr = _parse_and_reduce_expression(p_block, p_function_info);
			if (!expr) {
				return nullptr;
			}
			tk = _get_token();