Compilation error with block lambda expression in RHS with non-exec-model

rule Hello1
  when
    $list : List()
    $p : Person()
  then
    $list.stream().forEach((i) -> {System.out.println("Here");});
    modify($p) {
        setAge(100);
    };
end

Rule Compilation error : [Rule name='Hello1']
	$p cannot be resolved to a variable
	Syntax error, insert ";" to complete Statement
	The method setAge(int) is undefined for the type Rule_Hello1952063464

$list.stream().forEach(i ->  System.out.println("Here"));