### 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
}
									}
									if (tk.type != TK_PARENTHESIS_CLOSE) {
										_set_expected_error(")");
										return ERR_PARSE_ERROR;
									}
									new_hint = ShaderNode::Uniform::HINT_RANGE;
								} break;
								case TK_HINT_INSTANCE_INDEX: {
									if (custom_instance_index != -1) {
										_set_error(vformat(RTR("Can only specify '%s' once."), "instance_index"));
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									if (tk.type != TK_PARENTHESIS_OPEN) {
										_set_expected_after_error("(", "instance_index");
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									if (tk.type == TK_OP_SUB) {
										_set_error(RTR("The instance index can't be negative."));
										return ERR_PARSE_ERROR;
									}
									if (!tk.is_integer_constant()) {
										_set_error(RTR("Expected an integer constant."));
										return ERR_PARSE_ERROR;
									}
									custom_instance_index = tk.constant;
									current_uniform_instance_index_defined = true;
									if (custom_instance_index >= MAX_INSTANCE_UNIFORM_INDICES) {