error[E02011]: invalid 'friend' declaration
  ┌─ tests/move_check/naming/friend_decl_out_of_account_addr.move:7:5
  │
7 │     friend 0x2::M;
  │     ^^^^^^^^^^^^^^
  │     │      │
  │     │      Cannot declare modules out of the current address as a friend
  │     Invalid friend declaration