Closed agent arguments

Hi,

I detected a spurious behaviour of agents if the program
had been compiled by SE2.*. Consider the following class:

class X creation make

feature
  make is
    do
      n := 3
      func := agent run(n)  -- closed_arg=5 at agent creation time
      n := 5
      func.call([])         -- uses new value of `n' for closed_arg
    end

  n: INTEGER
  func: PROCEDURE[ANY,TUPLE]

  run(i: INTEGER) is
    do
      print(i.out);  print("%N")
    end

end

When running, the program prints 5 while one would
expect 3 (and 3 is also the output if compiled by SE1.1).
Is this a bug or a new language feature?
In case of the latter, where has it been described?

Best regards